HERE - Town of San Anselmo

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Town of San Anselmo
Local Hazard Mitigation and Climate
Adaptation Plan
February 17, 2016
1
Introduction and background ....................................................................................................................... 3
Purpose of the Plan ................................................................................................................................... 3
Definition of Hazard and Hazard Mitigation ............................................................................................. 4
Definition of Climate Change and Climate Adaptation............................................................................. 4
The Planning Process .................................................................................................................................... 5
2015 Planning Team.................................................................................................................................. 5
Plan Update Public Involvement ............................................................................................................... 5
Plan Update Review of existing plans and reports ................................................................................... 6
2015 Plan preparation .............................................................................................................................. 7
Background ................................................................................................................................................... 7
Town Overview ......................................................................................................................................... 7
Development Trends................................................................................................................................. 8
Assets, Infrastructure and Critical Facilities .............................................................................................. 8
Existing Emergency Response and Hazard Mitigation ............................................................................ 10
2015 Risk Assessment- Identification of Hazards ....................................................................................... 11
Dam Failure Hazard Profile ..................................................................................................................... 13
Drought Hazard Profile ........................................................................................................................... 16
Earthquake Hazard Profile ...................................................................................................................... 18
Landslide Hazard Profile ......................................................................................................................... 24
Flooding & Severe Winter Storms Hazard Profile ................................................................................... 27
Wildfire Hazard Profile ............................................................................................................................ 38
Hazardous Material Incident Hazard Profile ........................................................................................... 42
Mitigation Strategy ..................................................................................................................................... 44
Local Hazard Mitigation Goals ................................................................................................................ 44
2015 Strategy Development ................................................................................................................... 45
Evaluation of Progress from 2010 Plan ................................................................................................... 45
Evaluation of On-Going Mitigation Strategy Programs .......................................................................... 46
New Mitigation High-Priority Strategies ................................................................................................. 47
Very High Priority Strategies ................................................................................................................... 48
High Priority Strategies ........................................................................................................................... 50
Complete Strategy Table......................................................................................................................... 53
Future Plan Maintenance Process .............................................................................................................. 68
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Future Monitoring, Evaluating, and Updating the Plan .......................................................................... 68
Incorporation into Existing Planning Mechanisms ................................................................................. 68
Continued Public Involvement ................................................................................................................ 68
Appendices.................................................................................................................................................. 68
Resolution of Adoption ........................................................................................................................... 68
Public Meetings and Outreach Documentation ..................................................................................... 69
Country Fair Day Survey and Results ...................................................................................................... 70
Plan Development Team Meeting Documentation ................................................................................ 74
Stakeholders ........................................................................................................................................... 81
Works Cited ................................................................................................................................................. 83
Introduction and background
Purpose of the Plan
Through partnerships and community engagement, the purpose if this plan is to identify and reduce the
vulnerability to natural hazards in order to protect the health, safety, quality of life, environment, and
economy of the Town of San Anselmo and its neighboring communities. By updating and improving the
existing hazard mitigation plan we endeavor to improve local hazard preparedness, response, recovery
and resiliency.
The plan identifies flooding, earthquakes, wildfires, landslides, dam inundation, hazardous material
incidents, and drought as natural hazards that the Town may experience. San Anselmo has a long history
of flooding and remains extremely susceptible to future events but the way forward is still unclear. In
the wake of the 2015 Measure D defeating the possibility of using Memorial Park for a flood control
detention basin, the community is clearly still searching for acceptable solutions to flooding. Moreover,
this plan is an important exercise to recognize and evaluate the suite of other hazards that exist. Our
tree-covered landscape could become fuel for fires that could char and destroy our land and homes. Our
scenic hillsides can fall victim to unrelenting winter rains, causing landslides, mudslides and erosion. Like
all of the Bay Area, we are also always at risk from earthquake. Planning is needed to minimize the
potential for loss of life, injury and property damage from any natural disaster.
This plan also acknowledges global climate change as potentially destabilizing the health, safety, quality
of life, environment, and economy of the Town over the long temp and includes strategies for improving
the resiliency of our community in the face of a trend towards increased average air temperatures and
weather extremes over the long term.
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This document is intended to implement the Federal Emergency Management Agency’s (FEMA)
Mitigation Planning regulations (44 CFR 201), the federal Disaster Mitigation Act of 2000, and the
Floodplain Management Plan requirements of FEMA’s Community Rating System (CRS). The Town is
required to have a FEMA-approved hazard mitigation plan to be eligible for disaster recovery assistance
and mitigation funding. This plan was also adopted to qualify the Town for increased funding for certain
disaster recovery projects under the California Disaster Assistance Act.
This document is also intended to be adopted as the safety element of San Anselmo’s General Plan in
accordance with the California Disaster Assistance Act (Assembly Bill 2140), thereby keeping the Town’s
projects eligible for full reimbursement.
Definition of Hazard and Hazard Mitigation
A “hazard” is defined by FEMA as “any event or condition with the potential to cause fatalities, injuries,
property damage, infrastructure damage, agricultural loss, environmental damage, business
interruption, or other loss.” Hazard mitigation is defined by FEMA as “any sustained action taken to
reduce or eliminate long-term risk to people and property from natural hazards and their effects.”
Hazard mitigation is aimed at breaking the cycle of damage, reconstruction, and repeated damage.
Hazard mitigation is different than emergency preparedness, which focuses on emergency response in a
disaster (equipment, food, shelter, etc.).
Definition of Climate Change and Climate Adaptation
For the purpose of this plan, climate change refers to the deviation of normal weather patterns affecting
San Anselmo. Climate scientists, as headed by the Intergovernmental Panel on Climate Change (IPCC),
are predominately in agreement that weather patterns are changing on a global scale due to the
increase in anthropogenic greenhouse gasses and global warming. IPCC estimates that the sea level will
rise between a half-meter (1.6 feet) and 1 meter (3.2 feet) by the end of the century （IPCC，2015）.
The Marin County 2015 Climate Action Plan cites California research anticipating a rise of up to 5.5 feet
during that time. Other research and monitoring has demonstrated that Marin County has experienced
a shift towards warmer weather and increased precipitation in the last century although whether
precipitation will increase of decrease is unclear. (source Marin County 2015 Climate action plan). In
2011 San Anselmo adopted a Climate Action Plan, which outlines actions the Town can take to reduce its
greenhouse gas emissions. （TSA，2011）
San Anselmo has begun to include strategies for climate adaptation into its Hazard Mitigation planning
process, particularly the more unanimous effects of warming temperatures. Warming temperatures
combined with more infill development and the heat-island effect have the potential to exacerbate the
effects of drought and wildfires here. At 50 feet above sea level, San Anselmo is barely high enough to
avoid these impacts of rising sea levels for the 5-year period of this plan. Nearby communities
downstream should begin experiencing deleterious effects of sea level rise first.
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The Planning Process
2015 Planning Team
This update to the San Anselmo LHMP was directed by a planning team consisting of Town Staff with the
representatives from the Police, Fire, Building, Planning, Public Works, and Administration Departments
listed below. The team met in person four times during 2015 (see documentation in appendix). Other
forms of involvement include provision of the Larkspur LHMP by Central Marin Police. Team members
from each department participated in every public meeting. This is the fourth iteration of a FEMAapproved Hazard mitigation plan, and the third version of the multi-hazard LHMP, so we are effectively
collaborating with the planning teams of the past as well. Only the Town Manager was involved in the
previous (2010) LHMP.
The planning team:
Name
Title
Department
Debra Stutsman
Town Manager
Town Administration
Dan Mahoney
Battalion Chief
Ross Valley Fire
Mike Norton
Lieutenant
Central Marin Police
Elise Semonian
Planning Director
Planning
Sean Condry
Public Works Director
Public Works
Sarah Price
Planning Technician
DPW/Planning
Gerhard Epke
Consulting Project Manager
DPW
Plan Update Public Involvement
San Anselmo engaged the public in the hazard mitigation planning process and provided opportunities
for the public to comment during the drafting stage and prior to plan approval. The planning team
identified stakeholders in the planning area, including neighboring communities, local and regional
agencies involved in hazard mitigation activities, as well as businesses, academia, and other private and
non-profit interests, and gave them an opportunity to be involved in the planning process.
The planning team used the Town Manager’s weekly newsletter and fliers, as well as emails to
stakeholders, to advertise the first two public meetings. Documentation for all of the public meetings is
included in the Appendix.
The first public meeting, an agenda item during the Town Council meeting on July 28 2015, was an
introduction to the local hazard mitigation planning process, climate adaptation and resiliency, and
discussion of the Town assets and risk assessments that had been drafted. No action was taken. Two
members of the public spoke favorably about the importance of the plan.
The second public meeting was a booth at the Town’s Country Fair Day Event. The planning team
created a 5-question online survey and handed out stickers with a link. The booth also distributed a
variety of hazard information such as FEMA brochures, fire department coloring books, and had a large
flood map available for viewing and discussion. 14 people completed the survey (see Appendix). A third
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public meeting was held at the Flood Committee Meeting November 19, 2015. Staff presented the draft
flood mitigation strategies. A fourth public meeting was held at the San Anselmo Planning Commission
on February 1, 2016. One member of the public spoke favorably about the draft plan. A fifth public
meeting was held at the San Anselmo Town Council February 9, 2016. At this meeting one member of
the public spoke favorably about the draft plan, the Town Council approved sending this plan to
California Office of Emergency Services (CalOEMA) and FEMA for approval. See the second Appendix for
San Anselmo Town webpage addresses linking to the public meeting agendas, staff reports, and
minutes.
This Plan will be formally adopted by the San Anselmo Town Council after it get approval from CalOEMA
that it satisfies the requirements mentioned above. The plan adoption documents will be contained in
the Appendices.
Plan Update Review of existing plans and reports
This is an update of San Anselmo’s 2010 Local Hazard Mitigation Plan （TSA，2011）, which was
adopted in 2011. The 2010 Local Hazard Mitigation Plan was an annex to the Association of Bay Area
Governments (ABAG) multi-jurisdictional Local Hazard Mitigation Plan for the San Francisco Bay Area
titled Taming Natural Disasters. Taming Natural Disasters expires in March 2016 and will not be
renewed for San Anselmo to reference. This plan incorporates the most important information from the
previous plan- in particular it contains and updates the spreadsheet of specific mitigation strategies
from 2010. This narrative portion of this plan, however, was mostly rewritten as it is no longer
connected to any larger multi-jurisdictional plan. The previous San Anselmo LHMP was closely reviewed
during the planning process, as were other local Hazard Plans, such as the recently completed freestanding plan in Town of Ross （Ross，2012） .
Marin County Office of Emergency Services is in the early stages of creating a multijurisdictional Hazard
Mitigation Plan for the entire County, as an update to its 2012 Local Hazard Mitigation Plan （MCOES）.
If this happens within the 5-year term of this plan, it is intended that this plan gets included as an annex
specific to San Anselmo.
The primary planning document for the Town is the San Anselmo General Plan which was adopted in
19892. The Housing Element was updated in 2015. San Anselmo’s General Plan does not have a Safety
Element thus in order to comply with California Assembly Bill 2140, the Town Council will be asked to
approve a resolution amending the General Plan by adoption of this LHMP as a chapter thereof.
http://www.townofsananselmo.org/DocumentCenter/View/3721)
The City of Larkspur’s ‘Updated All Hazard Mitigation Plan’6 was completed last year, and is relevant
since we now share a police department （Larkspur，2014）.
The other plans and documents, reviewed by the planning team are listed and hyperlinked in the Source
Document List Appendix.
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2015 Plan preparation
The process of updating this Hazard Mitigation and Climate Adaptation Plan was guided by a ‘Meeting
Roadmap’ developed by the ABAG resilience program （ABAG，2015）. San Anselmo staff attended a
series of three regional workshops over the course of six months on Community Engagement, Hazard &
Risk Assessment, and Mitigation and Adaptation Strategy.
The planning team met five times over seven months, beginning on May 21, 2015, to draft the plan.
Prior to drafting the plan, the planning team reviewed existing studies and plans and reached out to the
stakeholders listed in the Appendix.
Background
Town Overview
San Anselmo’s General Plan Housing Element was updated in 2015 and provides background
information and current demographics for the Town.
The 2010 U.S. Census reports that the Town of San Anselmo has 12,336 residents which is a decrease of
42 people over 10 years. The Town’s population has remained around this number since the 1960s.
There are about 5,542 housing units in San Anselmo.
Existing development in San Anselmo is primarily low density single-family residential. The Town has
several commercial areas including downtown. As of 2015, the Town receives about $850,000- 6 %, of
its general fund revenue from sales taxes and an additional $700,000 for roads through Measure D.
The median income and house values in San Anselmo are mixed. According to the 2010 U.S. Census,
median household income is $92,760. Average home prices are between $900,000 and $1 million and
the Town Building Department estimates that construction costs are average between $250- $350 per
square foot. About 66 percent of the Town’s households are estimated to be moderate and above
moderate income while 34 percent are considered lower income. About 13 percent of the households in
San Anselmo are estimated to be extremely low income, 10 percent are estimated to be very low
income, 11 percent are estimated to be low income.
The climate in San Anselmo is mild and dry during summer, temperatures tend to be in the 70's, and
cool during winter when temperatures tend to be in the 50's. The warmest month of the year is July
with an average maximum temperature of 90 degrees Fahrenheit. The coldest month of the year is
December with an average minimum temperature of 35 degrees Fahrenheit. The annual average
precipitation in San Anselmo is about 35 inches however due to the geography precipitation varies from
45 inches on the slopes of Mount Tamalpais to 25 in the eastern ridges. The wettest month of the year is
December with an average rainfall of 7.6 inches （Weather Channel）.
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Figures from www.city-data.com/city/San-Anselmo-California
Development Trends
The community has few undeveloped lots and is largely “built out.” The Town does not anticipate a
significant increase in population. The Town General Plan plans for land uses to remain the same in the
future: primarily single-family residential. Should a major disaster event occur that results in the
demolition of existing housing units, it is possible that parcels may be further subdivided for the
development of additional housing units. Future development, like current development, will consist
primarily of replacement and remodeling of existing residential structures.
Assets, Infrastructure and Critical Facilities
In order to describe the risk associated with each hazard, we need to first define the Town ASSETS we
are trying to protect. First and foremost are people- lives and livelihoods of our residents, merchants,
visitors, and people connected to the Town. Social assets such as interpersonal networks are invaluable
during emergencies and warrant further discussion.
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Environmental assets are also paramount yet difficult to quantify. One of the main themes being
promoted by ABAG for this plan is resilience and climate adaptation. Data for these themes are coarse,
but they boil down to healthy environments.
The current focus is on quantifiable and physical assets such as money and infrastructure. According to
the Marin County Assessor’s office the assessed value of all 6,000 buildings in Town is $1.37 billion. The
replacement cost could easily be an order of magnitude higher since many old structures have not been
reassessed in several decades and municipal infrastructure is not included.
The Town owns and maintains some of the most important infrastructure related to hazard mitigation
including Buildings (Town Hall, Library, Isabel Cook Community Center, Robson Harrington House,
Corporation Yard), Transportation System (Streets, Bridges, Sidewalks, Streetlights, Parking Lots, Bus
Stops, Traffic Signals), Parks & Openspace (Memorial Park, Creek Park, Lansdale Playground, Sorich Park,
Hawthorne Canyon, Faude Park, Robson Park, Oak Springs) and most of the Stormdrain Network
Some Town-owned buildings are considered critical facilities because of their role in emergency
response. San Anselmo’s critical facilities are:
Town Offices, Police Department, Council Chambers - 525 San Anselmo Avenue
Ross Valley Fire Department Station #19- 777 San Anselmo Avenue- built in 1976
Ross Valley Fire Department Station #20- 150 Butterfield Road- built in 1961
Town Corporation Yard – End of San Francisco Blvd
The original San Anselmo Town Hall and adjacent fire station were constructed in 1911. The library on
Tunstead Avenue was built four years later with funds from a Carnegie grant. In 1961 a second fire
station was constructed at 150 Butterfield Road. In 1976 the downtown fire station was moved down
the street to its present location at 777 San Anselmo Avenue (Fire Station #19), and the Town Hall
building was renovated to its present configuration with police downstairs and administration upstairs.
These buildings are all located in the FEMA Special Flood Hazard Zone A.
After extensive damage during the 2005 flood, Town Hall and the library were retrofitted with flood
gates and a pump system to keep it operational as the Emergency Operation Center during floods. Fire
Station #19 was also seriously damaged and rebuilt with flood gates.
The Town owns and maintains fifteen bridges which are essential to transportation, particularly
emergency service, in Town. Six of the smaller bridges, such as Broadmoor, Morningside, and Mountain
View Avenues are technically considered culverts by Caltrans and thus are not eligible for state funding
assistance. Of the other nine bridges, three –Madrone Avenue, Nokomis Avenue, and Center Boulevardhave been deemed functionally obsolete and are thus scheduled for replacement by Caltrans on the
next 3-5 years.
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The Town receives all of its potable water from the Marin Municipal Water District (MMWD). Seventyfive percent of the supply is from rainfall collected in 7 reservoirs in Marin. The remaining 25% is from
the Russian River in Sonoma County under contract with the Sonoma County Water Agency. The
MMWD’s potable water distribution system includes water mains, pump stations, and water storage
tanks. The District treats water at three treatment plants, including the Bon Tempe Treatment Plant
near Town. Pipelines are made of various materials, depending on when and where they were installed.
Since the late 1970s, the District has installed only welded steel and polyvinyl chloride (plastic) mains
due to their expected life spans of 100 years or more. MMWD has ongoing programs to replace older
water mains.2
Wastewater is collected and conveyed through a sewer pipeline system operated and maintained by the
Ross Valley Sanitary District. The District operates and maintains collection sewer lines and 20 pumping
stations which collect, pump and transport wastewater to Central Marin Sanitary Agency for treatment.
Approximately 95% of the District’s collection system was installed prior to 1955. The Ross Valley
Sanitary District in an October 2011 memo indicates that their two hundred miles of public sewer pipe,
and an additional two hundred miles of private laterals, are “mostly past their life expectancy and will
cost $400-500 million to replace.” The RVSD plans to rehabilitate up to two percent (four miles) of the
gravity sewer system each year. （RVSD，2013）
Electricity and gas are supplied by Pacific Gas and Electric (PG&E) infrastucture. There is a 12” natural
gas transmission pipeline in Town which runs along Red Hill Avenue from the Miracle Mile in San Rafael
terminating at the Hub, at which point a regulator distributes the flow of gas to local distribution lines.
In the years since the major gas line explosion in San Bruno, PG&E has significantly increased its
investment in infrastructure maintenance and public safety. PG&E works with local emergency
responders on plan development and training. The company’s 2014 gas safety and emergency response
plans can be found online. （Wickham，2016）
https://www.pge.com/includes/docs/pdfs/safety/systemworks/gas/GasSafetyPlan_2014.pdf
The Town has a road network of primarily local streets. There are no freeways in the Town. Several of
the town streets in hillside areas are not accepted or maintained by the Town. Sir Francis Drake
Boulevard is an arterial route that bisects the Town and is an important transportation route for San
Anselmo and the surrounding communities.
There are no hospitals in San Anselmo but several ancillary health-related facilities (including medical
offices, pharmacies, and specialty clinics, etc.) some of which are in the Special Flood Hazard Area
(SFHA) aka the 100-year flood zone. Three gas stations exist along Sir Francis Drake Boulevard.
The San Anselmo Post Office is located at 121 San Anselmo Avenue, within the floodplain.
Existing Emergency Response and Hazard Mitigation
San Anselmo’s two fire stations, numbers 19 and 20, are part of the Ross Valley Fire Department which
has additional stations in adjacent Towns and responds to emergencies. Paramedics are embedded in
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engine crews operating out of stations 19 and 20. A paramedic ambulance managed by the Ross Valley
Paramedic Authority is based at Station 18, in Ross. A hazardous materials spill response vehicle is
stationed at Station 19, in downtown San Anselmo. Fire safety education is an important part of RVFD’s
service and includes home and business inspections, vegetation management, ensuring access and
clearance, and home construction/remodel plan checks. San Anselmo is a partner in Community
Emergency Response Team (CERT) training program. Community education is ongoing and includes
group CPR instruction, flood and wildfire education, a yearly Disaster Awareness Fair, and Get Ready
community preparedness training.
In 2013 San Anselmo’s police department was consolidated with Twin Cities Police to form Central
Marin Police Department. Central Marin Police continue to operate out of San Anselmo Town Hall
however the main station is in Larkspur. Marin County Sheriff now share use of the former San Anselmo
Police Station downtown. Marin County Sheriff and Office of Emergency Services (OES) are
headquartered at 1600 Los Gamos Drive, at the corner of Highway 101 and Lucas Valley Road.
The San Anselmo Building, Public Works and Planning Departments enforce the most recent California
Building Code and the San Anselmo Municipal Code, which contains numerous provisions designed to
protect property from hazards and preserve the natural environment. The Town Municipal Code
includes requirements for grading permits, regulates development in the floodplain and also stormwater
management.
The Town zoning regulations- design review requirements and guidelines, which include many
provisions specific to preventing development from creating hazards, reducing the risk of hazards on
development, and for protection of the environment.
2015 Risk Assessment- Identification of Hazards
This section identifies and describes all natural hazards that can affect San Anselmo. In order to identify
the type of hazards that may affect Town, the planning team considered the historical natural hazards,
the potential impacts of climate change, conducted internet research and considered recent State,
regional and County hazard mitigation plans. The planning team considered the range of hazards that
could affect the Town listed in the table below. Hazards highlighted were considered relevant and
profiled in detail.
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San Anselmo Hazards Preliminary Assessment
Hazard
Avalanche
Coastal Erosion
Coastal Storm
Dam Failure
Profiled?
No
No
No
Yes
Drought
Earthquake
Expansive Soils
Yes
Yes
No
Levee Failure
Flood
Hailstorm
Hurricane
Land Subsidence
Landslide
No
Yes
No
No
No
Yes
Severe Winter Storm
Yes
Tornado
Tsunami
No
No
Volcano
Wildfire
No
Yes
Windstorm
Hazardous material
incident
No
Yes
Terrorism
No
Explanation
The weather in San Anselmo is not cold enough for snow.
The Town has no coastal areas.
The Town has no coastal areas.
The Phoenix Lake Dam in the Marin Municipal Water District
(Marin County) outfalls into a portion of San Anselmo.
Marin has experienced droughts.
The Town is located in a seismically active region.
Areas of Mt. Baldy have a “moderate” risk. However, there is
no development in the area.
There are no levees in or near the Town.
Areas of the community are located in flood prone areas.
Hailstorms are not known to occur in the Town.
No hurricanes occur in the area.
Not a hazard in the Town.
The Town is vulnerable to landslides and slope instability,
particularly after prolonged rainfall.
Severe winter storms are considered in the flood risk
assessment although large storms often coincide with
other hazards such as landslides and flooding, but also
include trees falling and infrastructure damage.
No tornadoes occur in the area.
Based on available “worst case scenario” mapping by the
Association of Bay Area Governments, the Town of San
Anselmo is not within an area that is anticipated to be directly
affected by a tsunami.
Not a hazard in the Town.
The Town may be subject to wildfires. The Town is adjacent to
large areas of undeveloped land and the climate, vegetation
and topography lead to fire risks.
Not a hazard in the Town. See Severe Winter Storm.
The Town of San Anselmo follows the Marin County Hazardous
Materials Area Plan. The Area Plan is the principal guide for
agencies of Marin County, its incorporated cities, and other
local entities in mitigating hazardous materials emergencies.
The small residential Town is unlikely to be a target of
terrorism that rises to the level of a community hazard.
The Town will analyze other hazards that are not addressed in this plan if they are determined to be of
greater significance in the future. The Disaster Mitigation Act of 2000 does not mandate that the Town
include human-caused hazards in the hazard mitigation planning and, aside from Hazardous Material
Incidents, they have been excluded from this hazard mitigation plan because the size and characteristics
of the residential community make it unlikely that a human-caused hazard will create a significant risk to
the Town.
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The impacts of climate change on hazards are discussed in the individual sections, where applicable.
Climate change has never been directly responsible for any declared disasters in San Anselmo. The
potential effects of climate change are varied and include warmer and more varied weather patterns
and sea level rise. Based on ABAG maps, a 55 inch sea level rise will not be a direct hazard for the Town
of San Anselmo. However, sea level rise may exacerbate flooding in the Town. In November 2010 the
San Anselmo Town Council approved a Climate Action Plan that details Town actions to reduce
greenhouse gas emissions.
Dam Failure Hazard Profile
Hazard Description
Dam failure refers to the physical collapse of a dam which impounds a reservoir of water, thereby
resulting in inundation of the downstream area. Dam failures are relatively rare but can result from a
number of natural or manmade causes such as earthquakes.
Phoenix Lake Dam, owned by the Marin Municipal Water District (MMWD), is on the west side of the
Town of Ross. The State of California Department of Dam Safety indicates the dam was built in 1907 and
has a capacity of 612 Acre Feet. The dam is an earthen fill dam constructed in 1906 using the hydraulic
fill method. It is 95 feet high and 350 feet long with approximately 411 acre-feet storage capacity. （
MCDPW）
Location & Extent
Phoenix Lake flows to Ross Creek which joins Corte Madera Creek in the Town of Ross and flows into the
San Francisco Bay. State law requires dam owners to develop maps depicting areas that might be
inundated by dam failure. The maps were developed using engineering hydrology principals and
represent the best estimate of where the water would flow if the dam completely failed with a full
reservoir. The inundation pathway is based on completely emptying the reservoir and does not include
runoff from storms. Dam inundation maps do not indicate the depth of inundation and may represent
only an inch of water over some inundation areas. No recent maps have been made of the inundation
area. Development downstream of the dam and upgrades to the dam may have altered the inundation
area since the 1970s. The inundation map provides an estimate of the general location and extent of the
dam failure inundation area.
The mapped inundation area within the Town of San Anselmo is limited to one block, or approximately
30 parcels, between Bolinas and Belle Avenues. MMWD indicates that, “while the instantaneous failure
of the embankment, or any failure for that matter, is very unlikely, water from such a failure would
reach [San Anselmo] in less than ½ hour. Since the volume of water in the lake is small, any such
flooding would pass quickly, and likely be relatively shallow, however, in extreme circumstances some
damage would undoubtedly occur.”
Previous occurrences
A dam has never failed in the San Francisco Bay Area.
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Probability of future events
San Anselmo’s neighboring Town, Ross, is directly downstream, of Phoenix Lake. The Town of Ross
General Plan Safety Element provides:
In 1974, a seismic stability analysis of Phoenix Lake Dam was conducted for the Marin Municipal Water
District. The purpose of this study was to assess the risk of seismically induced flooding associated with
failure of Phoenix Lake Dam. The earth dam was constructed just prior to the 1906 earthquake, which
created a landslide on the inside portion of the dam embankment. The slope stability analysis conducted
in 1974 concluded that the dam spillway could settle from 4 – 6 feet during an earthquake with a Richter
magnitude of 8.5 generated along the San Andreas Fault. The 1906 San Francisco earthquake had a
Richter magnitude of 8.3.
In response to this assessment, the Marin Municipal Water District has widened the spillway by 5 to 6
feet and has lowered the spillway by 6 feet. Accordingly, these improvements to the dam have reduced
the flood risk to one flood in 30,000 years.
According to MMWD, “the dam has been modified several times in the last 100 years including
increased height of fill, outlet works changes, an embankment buttress fill in the 1960s and a new
spillway, designed for a spillway design flood with a recurrence interval of once in 10,000 years or so,
and an increase in freeboard in the mid-1980s.” The dam is inspected yearly by the California Division of
Safety of Dams and has been rated by that agency as acceptable for continued operation. Their rating
for the facility is 3C, there is a potential for damage should the dam fail but that the dam is in good
condition for its age.
The Phoenix Lake Dam is over 100 years old. According to ABAG, when a dam in known to have a failure
potential, the water level is reduced to allow for partial collapse without loss of water as required by the
State Division of Safety of Dams and by safety protocols established by dam owners.
In 2011, the California Department of Water Resources awarded a $7.66 million grant to the Marin
County Flood Control District’s Ross Valley Watershed Flood Protection program to fund a $19.7 million
project to retrofit for the Phoenix Lake reservoir into a facility that will function as a flood control
detention basin in addition to its current use as a water supply storage facility and public recreation
area. This project will be developed in partnership with the Marin Municipal Water District, who
currently owns and operates Phoenix Lake. The project would seismically retrofit the dam and construct
other improvements to the hydraulic and recreational infrastructures of the lake. The project would
bring the dam up to modern safety standards. In addition, new inundation maps are likely to be
prepared as the project is reviewed.
Assessment of Town Vulnerability
The Town of San Anselmo does not believe the dam poses a significant hazard to the community
because the risk of dam failure is low and such a small portion of the Town is located within the
inundation zone.
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San Anselmo Dam Inundation AreaBetween Belle and Bolinas Avenue
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Drought Hazard Profile
A drought is a long period (typically two or three years) with below average rainfall that results in water
supply shortages. Town of San Anselmo receives water from the Marin Municipal Water District
(MMWD), which gets 75 percent of its water from local reservoirs and 25 percent from the Sonoma
County Water Agency. MMWD has a long-term water supply and management plan that includes a
drought analyses and impacts of climate change. As of 2014 MMWD also has a Drought Resiliency Task
Force.
The information in this section is obtained from the 2010 Water Management Plan, 2015 Urban Water
Management Plan Water Demand Analysis and Water Conservation Measures Update, and MMWD’s
website.
Description
MMWD has precautions to avoid or minimize droughts. During a declared shortage, MMWD would issue
notifications to its customers to conserve water. If the length of service interruption were to be for an
extended period of time, MMWD would determine if the situation is localized or widespread and
develop a specific plan to provide water for health and safety during the situation. During extended
periods of water shortage the District has worked with other water suppliers to provide modest
amounts of water.
Location & Extent
The entire Town of San Anselmo is subject to drought, which would be associated with a drought
throughout Marin County and watersheds and reservoir systems of MMWD. Alternatively, as is currently
the case in 2015, the State of California is experiencing a severe drought throughout the Sacramento
and San Joaquin watersheds. This situation does not affect San Anselmo hydrologically, but the
regulatory response- mandating municipal cutbacks- do impact the Town.
Previous occurrences of the hazard
California is currently experiencing an unprecedented drought beginning in 2012. In January 2014, the
Governor declared a State of Emergency in California in response to current drought conditions. 2015
has surpassed 1977 as the driest year on record in California. This was MMWD’s drought of record. A
more prolonged drought punctuated with brief periods of rainfall occurred from 1987 through 1992.
While California has experienced prolonged droughts in the past, notably 1973, 1976-77, 1987-1991,
and 2007-09, California faces an uncertain water future as climate change will likely increase the
number and severity of future droughts. The magnitude of this change is currently unknown, but we do
know that the way we consume and manage water will need to change in the future.
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Droughts are usually associated with the hazard of impacts on agriculture, which can impact people
indirectly. Since there is no agriculture in San Anselmo, prolonged periods of drought do not cause crop
losses. Lack of water affects the Town creeks, groundwater supply, threatened species (Steelhead), and
the Town’s ability to suppress wildfires. A drought may result in dry vegetation that is susceptible to
ignition and wildfires. A drought in San Anselmo can affect residents and businesses that rely on water
and can result in financial losses associated with loss of landscaping.
The Marin Municipal Water District indicates that existing water supply sources, in combination with the
conservation program, are projected to be sufficient to meet the needs of the MMWD service area for
the planning horizon of the 2010 Urban Water Management Plan. MMWD indicates their facilities are
designed to collect and deliver a sufficient amount of water to survive a repeat of the 1976-78 drought
with an acceptable level of emergency water rationing. Due to the current level of conservation by its
customers (who have reduced their per capita water consumption by 29% compared to the nonconserving water use levels of the 1970s), MMWD is planning its future water supply so that the depth
of mandatory rationing will be no more than 25% with a frequency of once in 80+ years. Based on the
2010 Urban Water Management Plan, MMWD is not currently seeking alternative water supplies such as
desalination.
Climate change is likely to influence the number and severity of future droughts in Marin County
however without scientific consensus on whether precipitation should be expected to increase or
decrease here, the type of change is hard to anticipate. Temperatures are expected to rise a few
degrees in the coming century （IPCC，2015）, but whereas much of the State of California relies
tenuously on snowpack in mountainous regions to provide annual water storage, MMWD water does
not come from snow. If precipitation rates do not change, increased temperatures can be expected to
boost evaporation and transpiration rates and reduce available water supplies. Due to the uncertainty
San Anselmo needs to be prepared for an increase in weather variability- meaning an increase in both
the frequency of droughts and the severity of winter storms.
Estimating Potential Losses
With current supplies and conservation levels, drought is not anticipated to cause significant losses.
Climate change may result in a warmer climate and droughts could become more frequent, more
severe, and longer-lasting.
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Earthquake Hazard Profile
This section details the affect that major earthquakes may have locally in San Anselmo. San Anselmo and
central Marin County are not known to have earthquake faults located beneath them, but several active
faults exist nearby, thus making us susceptible to large regional events. Any major Bay Area earthquake
has the potential to affect the quality of life of San Anselmo residents.
Even if major damage is not experienced in this specific location, a large Bay Area earthquake will cause
hundreds of deaths, leave thousands homeless, cause widespread damage and destruction to roads and
other infrastructure; damage businesses, housing, schools and healthcare facilities, impair government
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services and social services, and will devastate the regional economy.
Information for the earthquake hazard in the Town of San Anselmo was obtained primarily from the
Association of Bay Area Governments (ABAG) Regional Hazard Mitigation plan (2011), maps and other
information available from the ABAG web site at http://www.abag.ca.gov/, and maps and other
information available from the MarinMap website at http://www.marinmap.org.
Description
San Anselmo is near several active faults that have the potential to cause earthquakes that would be a
hazard for the Town. The San Andreas Fault runs north and south in the western side of Marin County,
approximately 8 miles southwest from San Anselmo. Several faults lay within approximately 15 miles
from the Town of San Anselmo: the San Andreas fault (capable of generating a magnitude 8.0
earthquake), the Hayward fault (capable of generating magnitude 7.2 and 7.4 earthquakes), the Rodgers
Creek Fault (capable of generating a magnitude 7.0 earthquake) and the San Gregorio fault (capable of
generating a magnitude 7.3 earthquake).
Earthquakes themselves may cause several different hazards: surface rupture, ground shaking,
liquefaction, landslides and tsunamis.
Surface Rupture
In general, earthquakes occur as a result of movement along active faults. If a fault rupture extends to
the surface, there is visible movement on a fault, surface rupture. San Anselmo is not located over any
faults and will not experience surface rupture hazards.
Tsunamis
Tsunamis can occur in the Bay Area as a result of off-shore earthquakes, even distant earthquake
events. Tsunami inundation is estimated to extend from the San Francisco Bay to College Avenue in
Kentfield. The 2009 Tsunami Inundation Map for Emergency Planning (by CalEma, CGS, and USC) is a
“worst-case scenario” map that combines inundation results for a suite of realistic local and distant
earthquakes and hypothetical extreme undersea, near-shore landslides. Since the Town is not within the
tsunami inundation area on this map, tsunamis are not considered a hazard in San Anselmo, though a
tsunami could potentially exacerbate the flood hazard.
Ground Shaking
The fault rupture of the ground generates vibrations or waves in the rock known as ground shaking. A
principal factor in determining shaking hazard is the magnitude of expected earthquakes. Larger
magnitude earthquakes generally cause a larger area of ground to shake hard, and to shake longer.
However, an earthquake shakes harder in one area versus another based not only on the magnitude,
but also on other factors, including the distance of the area to the fault and the type of geologic
materials underlying the site, with stronger shaking occurring on softer soils.
Liquefaction
Ground shaking can lead to liquefaction. When the ground liquefies in an earthquake, sandy or silty
materials saturated with water behave like a liquid, instead of solid ground. The “recipe” for liquefaction
is: 1.) the ground at the site must be “loose”, uncompacted or unconsolidated sand and silt without
much clay or stuck together; 2.) The sand and silt must be “soggy”, water saturated, due to a high water
table; and 3.) the site must be shaken long and hard enough by the earthquake to “trigger” liquefaction.
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Location and Extent
According to MarinMap, all areas of the Town will experience strong to very strong shaking from a major
earthquake. Low lying areas, which are on softer soils, will experience greater ground shaking. The
hillside areas could experience earthquake-induced landslides.
Ground Shaking
Marin Map has developed maps to aid in depicting seismic shaking amplification hazard in San Anselmo.
The following map indicates general areas of the Town that are likely to experience great shaking,
though no areas within the Town limits are categorized as greatest risk.
Liquefaction
The land in the Bay Area that is most vulnerable to liquefaction are areas in San Francisco Bay filled
since 1845 to transform tidal and submerged areas into land, and areas along existing and filled
stream channels and flood plains, particularly those areas with deposits less than 10,000 years old. In
San Anselmo, the areas along the existing and filled stream channels may be subject to liquefaction.
MarinMap has developed a map depicting hazard from liquefaction susceptibility. This map indicates
that areas in Town, primarily the low-lying areas adjacent to the Town creeks, have a “low”
liquefaction susceptibility level. However, liquefaction susceptibility should be considered on a site-bysite basis.
Earthquake-Induced Landslides
Ground shaking can also lead to ground failure on slopes, or earthquake-induced landslides. See
discussion under Landslide Hazard, below.
Many moderate to great earthquakes (over magnitude 6.0) have affected the Bay Area. Twenty-two
such events have occurred in the last 165 years, an average of one every seven and a half years. The
devastating San Francisco earthquake occurred in 1906 and caused extensive damage in Oakland, San
Jose and Santa Rosa. More recently, the 1989 Loma Prieta earthquake caused extensive damage in the
Santa Cruz Mountains, as well as in Oakland and San Francisco.
There have been four earthquake-related natural disasters in the Bay Area since 1950: the 2014 South
Napa Earthquake, the September 3, 2000 Napa earthquake (both declared a disaster in only Napa
County), the 1989 Loma Prieta earthquake (declared a disaster in Alameda, Contra Costa, Marin, San
Francisco, San Mateo, Santa Clara, and Solano counties), and the April 1984 Morgan Hill earthquake
(declared a disaster in Santa Clara County)
The probability of a major earthquake in the Bay Area is great. The U.S. Geological Survey (USGS)
indicates that there is a 63% probability of a magnitude 6.7 or larger earthquake in the Bay Area in the
next 30 years (with a wide error range plus or minus 22%). Smaller earthquakes are more likely to occur
and can still produce significant damage.
A major earthquake event could result in deaths, injuries, property and environmental damage, and
disruption of normal government and community services. Hospitals outside of the Town may be
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impacted by an earthquake. Telephone systems will be affected by system failure, overloads and loss of
electrical power. Natural gas leaks pose a fire threat and breaks in the system could affect service to the
Town. Water sources could be compromised due to damage to treatment plants, pump stations and/or
the pipelines that distribute potable water. Liquefaction-related damage to water supply pipelines could
impair fire suppression, leaving the Town vulnerable to a large fire. Sewage collection systems
throughout Marin County may sustain widespread damage if ground movement damages mains or
pipelines. Electricity may be interrupted. Landslides may occur. Bridges and roads may be closed
because of damage. An earthquake may also result in dam failure. (Source Marin County General Plan)
Liquefaction of creeks during the winter storm season could exacerbate flood hazards.
There is no national, state or local warning system for earthquakes. Japan, Mexico, Turkey, Romania and
Taiwan have early earthquake warning systems. Scientists in the United States have been testing a
warning system that provides a few seconds to a few tens of seconds of warning before an earthquake
event. This early warning would provide time for individuals to get to a safe location, to shutdown
utilities, and take other steps to reduce hazards from ground shaking. California scientists are working to
produce a reliable system for general use. (California Integrated Seismic Network
http://www.cisn.org/eew/)
Uninhabitable housing due to ground shaking damage
ABAG predicts that up to 3,495 housing units in the Marin County area may be left uninhabitable by an
Earthquake that involves the full San Andreas Fault. Older single family homes (pre-1940s) are the most
vulnerable to earthquake hazards. Based on the developments in the building codes and construction
practices, World War II or, in terms of decades, 1940, has been identified as a turning point in the
development of construction practices.
Transportation system disruption
ABAG’s modeling of road closures in future earthquake scenarios predicts the earthquake will also result
in 70 road closures in Marin County. The Town may experience road closures from liquefaction,
earthquake-triggered landslides, shaking damage to bridges as well as indirect causes of closures such as
building damage, hazmat releases, and utility pipeline breaks and fallen trees.
The Town of San Anselmo will be affected by the regional impacts of regional transportation disruption,
particularly closure of the main San Francisco bridges such as the Golden Gate.
Utility disruption
Pipelines break and leak as a result of earthquakes. An ABAG analysis of damaged pipelines following
the 1989 Loma Prieta earthquake indicated that pipelines in areas subject to liquefaction and exposed to
violent ground shaking were the most likely to have broken or leaked as a result of that earthquake.
Some of the Town water and sewer facilities are very old and may leak and break. The Town gas and
electricity system may be damaged and interrupted.
Identification of Structures Subject to Hazard
All structures are potentially subject to damage by earthquakes. Due to the enforcement of building
codes on new construction and remodels, older buildings in Town, particularly stone, masonry, and softstory buildings are more at risk of failure. The Town Building Department completed an inventory of
masonry buildings and stone buildings in 2006. All 18 masonry and 3 stone buildings have been
reinforced.
Soft story buildings are multi-story buildings in which the bottom story is susceptible to shearing or
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collapse during earthquakes because of large openings such as windows, doors or open walls such as
parking areas. Soft story failure was responsible for over half of collapsed buildings in the 1989 Loma
Alta earthquake. San Anselmo has not yet completed a soft story inventory or implemented a retrofit
program.
Critical Facilities
San Anselmo’s critical facilities are Town Hall (including Town Offices, Police Department, Council
Chambers), Ross Valley Fire Department Stations #19 & #20, and the Corporation Yard.
Town Hall was constructed in 1911 and renovated in 1976 and 2006. It is a wood building in good
condition. Fire station #19 was constructed in 1976 and renovated in 2007, it is also in good condition
and not in need of retrofits or upgrades. Fire station #20 was constructed in 1961 and is in satisfactory
condition. The Town Corporation yard buildings are metal framed, constructed in 2002, and in good
condition.
The Town does not have a reliable method to estimate potential dollar losses to vulnerable structures
from earthquake related causes. ABAG, in collaboration with USGS, CGS, and OES, has identified
significant problems with using the ShakeMap scenarios (which tend to produce shaking levels lower
than the ABAG Shaking Scenario maps), the existing vulnerability formulas (which are prone to
underestimate housing losses and losses to wood-frame structures), and incomplete building inventory
data. The HAZUS, software package developed by FEMA for loss modeling, loss estimates are currently
inadequate for planning purposes. For example, the 1994 Northridge earthquake caused over $40 billion
in losses, HAZUS estimates the total losses for that earthquake as only $23 billion.
In addition, the Town does not have reliable information on the value of existing structures. The Town
cannot rely on assessed value, since the values are not updated to reflect actual value since Proposition
13.
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Landslide Hazard Profile
Description
Landslides are a potential hazard in the Town of San Anselmo. Landslides include all movements of soil,
rock or debris as a result of falling, sliding or flowing. The triggering cause may be heavy rainfall or
seismic activity. An untimely occurrence of a large earthquake during or soon after a sustained period
of moderate to heavy rainfall could produce a landslide problem in San Anslemo.
Landslides may destroy residences, block roads, sever utilities and water supply, and injure or kill
people. Emergency operations may be hampered by road closures and loss of communications.
Extensive efforts may be required to rescue trapped persons, recover bodies, remove debris, assist in
reestablishing vital public services and utilities, and offer care and shelter to affected persons. A typical
soil debris avalanche in Marin involves a few hundred cubic yards of soil and colluvium and is the result
of total saturation of a part of a hillside.
Location & Extent
MarinMap has generated a map that shows the landslide risk in the Town of San Anselmo. According to
that map the greatest risk is concentrated on the periphery of the town border.
Flooding and landsliding associated with severe storms have been among the most common disasters
in the Bay Area during the period from 1950 to 2009. During periods of heavy rainfall, excessive water
consistently triggers slides in the County and caused significant infrastructure damage during the floods of
1970, 1973, 1982, 1983, 1986, 1998, and January 2005.
It is probable that the Town will experience future landslides. In general, landslides are most likely
during periods of higher than average rainfall or El Nino winter storms. In addition, the ground must
be saturated prior to the onset of a major storm for significant landsliding to occur.
There is no way for the Town to estimate the scale of individual landslides in terms of size or extent
based on the available maps. Most landslides have resulted in localized damage and road closures.
Summary of the Town’s vulnerability
The Town’s critical facilities and schools are not located in slide hazard areas. Roads and residential
infrastructure would be impacted by a slide. Residences in the immediate area of a slide could be
damaged or destroyed.
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Many of the roads and utilities in the slide hazard area are privately owned. This could slow recovery
from the hazard as residents seek financing or resolve property ownership disputes.
It is difficult to estimate potential losses from landslides since the size of the landslides and the damage
they cause are varied. At best, the costs involve the cost of the slide clean up and stabilization of the
area. From there the costs vary widely. The Town of San Anselmo estimated it would cost $98,000 and
$140,000 for repairs associated with two roads damaged by slides in March 2011. The City of Mill Valley
insurers paid over 4 million dollars in damages and litigation costs for a slide originating from a Town
road that resulted in the death of a resident.
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Flooding & Severe Winter Storms Hazard Profile
Description
The Town of San Anselmo is subject to periodic flooding from San Anselmo and Sleepy Hollow Creeks.
The low-lying areas of San Anselmo and its neighboring communities have experienced widespread
flooding throughout history as creeks overflow their banks. The most recent event was the disastrous
New Year’s Eve Flood of 2005. Ross Valley Flood Control Program’s 2007 Capital Improvement Plan （
MCDPW）, completed by Stetson Engineers Inc. describes the San Anselmo flooding hazard:
Ross Valley is naturally prone to flooding by its location, geologic and geomorphic setting: rainfall can
be intense, soils are shallow with limited absorption capacity, slopes are steep, stream channels are
entrenched and in many places narrow with relatively little storage capacity. The watershed has been
altered from its natural condition and many sections of creeks and streams have been placed in
culverts and the natural pattern of runoff has been changed.
During prolonged and heavy storms the watershed can become saturated. If rainfall is sufficiently
intense, heavy runoff can result in high flows exceeding the capacity of the creek in places where
conveyance is constrained. Floodwaters escape the creek capacity and breach the creek bank in
downtown San Anselmo.
‘Localized’ flooding also occurs in many places in San Anselmo and is exacerbated where the storm
water drainage network has inadequate capacity for peak flows or is blocked from sediment, debris, or
vegetation. Localized flooding is characterized by excessive ponding in the street, and overflow onto
lower-lying residential properties even during 5-year storm events. Localized flooding can occur within
or outside of the FEMA designated floodplain. One example of localized flooding within the floodplain is
Bolinas Avenue, on the border with the Town of Ross. Because the historic flow path has been
severed, ponding occurs in the street during most large storms. When regional flooding occurs water
flows down San Anselmo Avenue and connects to Bolinas and Shady Lane.
Severe winter storms can also be accompanied by hazards and destruction resulting from high winds.
High winds knock down limbs or entire trees which subsequently damage power and utility lines,
buildings, block streets, and even pose a direct risk to human safety.
Location
The flood-prone areas in the Town of San Anselmo are west of Sir Francis Drake near downtown, and
along Sleepy Hollow Creek from the confluence upstream to the Fire Station #20. Main breakout
points are where man-made obstructions, such as retaining walls, bridges, and buildings obstruct the
flow of water.
During the 2005/2006 flood, five consecutive bridges were overtopped along Sleepy Hollow Creek. This
includes Sir Francis Drake Boulevard, Mountain View, Morningside, Broadmoor, and Arroyo Ave.
Flooding occurs around Saunders Avenue and downstream of there where Sleepy Hollow Creek meets
the mainstem.
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The deepest and most widespread flooding occurs in the area around downtown San Anselmo. At its
upstream extent, floodwater jumps the bank at Nokomis and Madrone Avenues and heads through
properties and towards Sycamore Ave. As San Anselmo Creek enters downtown San Anselmo it is
constricted by the series of Building Bridges downstream of Bridge Avenue. The creek’s capacity here is
approximately 2,800 cubic feet per second (cfs), which is approximately the discharge of the 20 percentannual chance flood (i.e., 5-year flood). When discharge exceeds this capacity, floodwaters overtop and
escape the banks of the creek, flooding the downtown business and residential district. During large
floods these floodwaters eventually reach the floodplain in Ross where they continue to flow through the
downtown business and residential district there before continuing farther downstream through the
community of Kentfield. Floodwaters return to the channel near the College of Marin in lower Kentfield.
Through San Anselmo’s participation in the National Flood Insurance Program, FEMA provides and
maintains detailed Flood Insurance Rate Maps (FIRMs) of the area. The most recent FIRM update
occurred in 2014. These new maps include:

The 100-year floodplain, also called the Special Flood Hazard Area (SFHA) or A zone

The 500-year floodplain, or X zone

The regulatory floodway, which delineates areas of fast-moving floodwater

Base Flood Elevations, which indicate the water surface elevation during the 100-year flood
FEMA flood maps are best viewed on the County GIS website marinmap.org but are also included as
figures at the bottom of this document.
Severe winter storms have the potential to be hazardous all over Town because trees, power lines, roads,
and buildings are evenly distributed. Regional topography plays a role in wind speeds and precipitation
amounts. While San Anselmo generally enjoys its warm sunny weather because of its relationship to
Mount Tamalpais, the mountain does not seem to diminish the impact of severe storms. The higher west
side of Ross Valley generally receives more precipitation and subsequent runoff due to the orographic
effect, however every storm seems to be different, and precipitation amounts can vary greatly between
gauges just a few miles apart.
Extent
Floods in the Town of San Anselmo develop rapidly, generally within 24 to 36 hours after the
beginning of the flood-producing storm, but are short in duration. Flood conditions usually subside
within 24 hours. In 1982, flood depths of 4 feet were reported in Town.
Floods in San Anselmo usually occur during large storm events. High winds and mudslides compound
the flood problems. A U.S. Geological Survey report noted that the total storm damage was far greater
than flood damage during the flood of 1982. （USGS，1989）
Typical winter peak discharges have been measured below 3,500 cubic feet per second (cfs). The two
most severe floods occurred in the winters of 1982 and 2005, with peak discharges of approximately
7,200 cfs and 6,800 cfs, respectively.
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There is a long history of flooding in San Anselmo. The two most severe foods occurred in the winters of
1982 and 2005. Prior to establishment of the USGS stream flow gauging station in Ross on Corte
Madera Creek in February 1951, flooding was reported in calendar years 1914, 1925, 1937, and 1942.
Since the Ross gage has been in operation, flood flows have been recorded in 1951, 1955, 1958, 1967,
1969, 1970, 1982, 1983, 1986, 1994 (flooding was reported, but the stream flow gage was not in
operation), and 2005. See the following San Anselmo Historical Museum web page for more information
about the history of flooding here:
http://sananselmohistory.org/articles/flooding/
The flood in December 2005 - January 2006, was a federally declared disaster DR-1628. Seven inches of
rain fell on the Ross Valley Watershed in the two weeks prior to the 2005 flood. Because of this nearsaturated condition, the earth had little or no capacity to absorb storm water on December 31, 2005. At
2:00 am on December 31, 2005, Corte Madera Creek was already at flood stage of 19 feet. The strongest
part of the storm occurred from 3:00 am to 6:00 am. Flood waters topped the banks at Ross and San
Anselmo at the same time. The flood crested at 22.5 feet, 3.5 feet above flood stage at Ross.
Typically, documentation of severe winter storms only exists when accompanied by flood events, so we
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do not have a good record of severe winter storm occurrence. The current Public Works Director was
traumatized on March 27, 2011 when approximately 5 inches of rain fell within a 50 minute period,
resulting in 5 simultaneous landslides and localized flooding all over Town.
Due to the nature of flooding in Ross Valley, future flooding in San Anselmo is probable and will remain
so until we have removed or reconstructed the bridges and buildings that restrict in-channel flow as
outlined in the Flood Control District’s Capital Improvement Plan. According to the flood frequency
graphs and inundation maps, there is roughly a one-in-ten chance of water rising beyond the creek
banks in a given year （MCDPW）.
There is every reason to believe future episodes of severe weather will occur with the same or greater
probability as currently exists. Climate change science indicates that the severe weather will most likely
increase.
FEMA’s new flood maps for San Anselmo clearly quantify the flood risks in Town and leave no doubt
about our vulnerability. Severe winter storms tend to cause a lot of relatively minor problems all over
Town. This means that the Town vulnerability depends on how effectively different factions of the
community and emergency services can respond. San Anselmo residents and staff pay close attention
to storm predictions, which have recently become more integrated with social media.
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Floods result in loss of property, health and safety hazards, disruption of commercial and governmental
services, expenditures for flood recovery, and impairment of the tax base, all of which adversely affect
the public health, safety and general welfare. Most flood losses are caused by structures that are
inadequately elevated, flood proofed, or protected from flood damage. Sites along the creek may have
issues with bank erosion.
Health and safety may be protected by alerting residents in advance of a flood hazard. There is a
stream gauge in Town that allows the Town to monitor when flooding is imminent. By monitoring the
creek gauge, the Town may warn residents through the Town email system when severe storms are
expected and when flood warnings are issued. The Town may alert residents of a flood by using an air
horn at the fire house. The Town would send recorded emergency announcements by phone to
subscribers in the Telephone Emergency Notification System (TENS). Although no deaths from flooding
have been reported in the last 30-40 years, drowning is the number one cause of flood deaths.
Currents can be deceptive, and only six inches of moving water can knock a person off of their feet.
Mud on surfaces creates a slipping hazard. Persons may attempt to drive through flooded areas and
drown. Power lines and electrical wires may create electrocution hazards and electrical current can
travel through water.
When electrical communication is down, the Town cannot warn residents of flood hazards through
emails and telephones that work on electricity.
Flood waters are powerful and may pick up and carry large and small debris, including broken glass and
sharp objects. Debris may contribute to flooding where the debris blocks streams or storm drains.
In addition to debris, flood waters may carry hazardous and toxic materials, including raw sewage,
animal wastes, oil, gasoline, solvents, and chemicals. During the peak of the 2005 flood, four of the
five pumps at the Ross Valley Sanitary District’s Kentfield pumping station (which pumps the sewage
to a treatment plant) unexpectedly shut down for 3 1/2 hours. Approximately 5,100,000 gallons of
sewage contaminated storm water may have contaminated areas in the Ross Valley, including
schools, parks and other public places.16 However, due to heavy rains associated with flooding events,
hazardous and toxic materials may be diluted.
Mold and mildew from flood damaged materials also present a significant health hazard. Therefore
cleanup and incentives for proper repairs are important.
Critical facilities and infrastructure
Several critical facilities are located within the SFHA. San Anselmo Town Hall, including the Council
Chambers and Police Station, is designated the Emergency Operations Center and is located downtown
amidst the floodplain. Both fire stations in Town are also located within the flood zone. Fire Station 19
and Town Hall are both equipped with engineered ‘dry’ floodproofing and barriers, however during a
major flood these locations would be inaccessible.
The San Anselmo fire station, police station, Ross Valley Paramedic ambulance and administrative
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offices are all located adjacent to Corte Madera Creek and within the special flood hazard area. The
personnel move vehicles and necessary equipment to higher elevations when a flood is imminent.
During major flooding events, the main Town thoroughfares are inaccessible and the Town is bisected
by the flood waters.
Medical facilities are located outside of the San Anselmo Town limits but may be inaccessible for some
residents due to impassible roads.
Economy and tax base
San Anselmo floods have a devastating impact on the downtown business. Businesses, many of whom
do not own the structures and may not be aware of the extent of the flood problem, lose inventory
and must close their doors during and after flood events, if they return to business at all.
The Town receives the majority of revenue from the residential tax base and not from
commercial businesses. However, Town residents lose the convenience of shopping at local
stores and also the community that the business district creates.
Review of flood insurance landscape
As of 2014 the Special Flood Hazard Area encompasses 161 acres of San Anselmo and includes roughly
562 buildings. There are 526 active National Flood Insurance Program (NFIP) policies in place in the
Town of San Anselmo. The average premium is $1,255 so the Town and constituents together pay
$660,130 annually. Many of these premiums are being raised by FEMA, and are expected to continue
rising.
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There have been 215 claims since the Town joined the NFIP program in 1978 totaling $11.3
million. $10.75 million of that was from the 2005/2006 flood.
San Anselmo ranks 7th in the State for flood insurance claims. According to FEMA flood insurance
claims data, approximately $10.75 million dollars in flood claims were paid after the 2005/2006 San
Anselmo flood. The claims ranged from $380 to $510,000. Several residences were elevated after the
2005/2006 flood. However, it is estimated that future floods would result in similar losses within the
town until the planned flood control infrastructure is built.
Repetitive Loss areas
This plan must evaluate “repetitive loss areas” for the Town participation in the FEMA Community
Rating System program. A Repetitive Loss Property is a property insured under the National Flood
Insurance Program that has had two or more claim payments of more than $1,000 within a 10-year
period since 1978. FEMA’s list of Repetitive Loss Properties includes only 1 address in Town. Because
our two biggest floods, 1982 and 2005, were more than 10 years apart, there are many properties
within the Town that have suffered repeated flood damage that are not considered Repetitive Loss
Properties.
Repetitive Loss Property addresses and flood insurance claim history are protected by the Privacy Act
and are not listed in this public document. However, in order to comply with requirements of the
Community Rating System, the Town Public Works Department has reviewed the property file, visited
the site, and sent letters to the property owner. The one repetitive loss structure is located near the Fire
Station in Sleepy Hollow, and presumably a result of the culvert under Arroyo Avenue- either due to
clogging by vegetation or simply being undersized.
Future Development and Flood Control Improvements
New Development
The flood prone areas of Town are “built out” and few vacant lots exist. However, as property values
rise, many new families are renovating and expanding their houses. Commercial buildings in Town
were predominately built before 1978, when Town joined NFIP, thus most of the downtown businesses
are located below the base flood elevation.
As a CRS community, San Anselmo regulates development beyond the minimum requirements of the
NFIP. All ‘substantial’ development within the SFHA requires an elevation certificate. Elevating
residences and flood proofing commercial structures can mitigate flood damage in the Town of San
Anselmo. Development of property within the Special Flood Hazard Areas must comply with Title 7,
Chapter 11 of the Town muni code. This section includes requirements such as requiring new and
substantially improved structures to be flood proofed or elevated and special provisions against
development in the floodway. Typically, residential structures are elevated one foot above BFE, while
33
commercial structures install flood gates. Several structures were elevated after the last flood event in
December 2005.
The existing Town design review guidelines recommend that new development be setback from
creeks and drainage ways. The Town goals and design guidelines recommend protection of existing
creek and riparian vegetation and improving fish passage and habitat.
Flood Control Activities
The Flood Committee was established in 2006 and formalized in May 2010 by Town Council Resolution
#3906. The committee is charged to serve as the town’s expert representatives on flooding and
stormwater management issues, to become informed on hydrologic conditions that affect flooding in
San Anselmo and to evaluate possible solutions and make recommendations to the Town Council. The
Flood Committee has five members from the public and two members of the Town Council. The
members of the public were chosen through the Town of San Anselmo’s standard volunteer /
commission member selection process. This process includes application, qualification review if
required, oral interview and final selection by the Town Council. Flood Committee agendas and
minutes for 2008 – 2011 can be found on the Town of San Anselmo website:
http://www.townofsananselmo.org/index.aspx?nid=181
After the flooding on December 31, 2005, the communities of the Ross Valley and the County of Marin
formed the Ross Valley Watershed Program, and San Anselmo joined the other Ross Valley
communities in Flood Control District Zone 9, a program of the Marin County Public Works
Department. The intent of the Ross Valley Watershed was to study flooding issues and propose
measures to reduce the risk of flooding in the Ross Valley.
http://www.marinwatersheds.org/rossvalleywatershed-org/
In 2007 Flood Zone 9 proposed a watershed-wide storm drainage fee, which was approved by the
voters to fund flood reduction measures. The Flood Zone 9 District includes Fairfax, San Anselmo, Ross
and Larkspur as well as the unincorporated communities of Kentfield, and Greenbrae. The District
anticipated leveraging revenue from the fee with other potential funding sources, including state and
federal resources, to fund projects that could relieve the chronic Ross Valley flooding.
Flood Zone 9 completed a hydraulic study of the watershed and a hydraulic model was created to
better understand the downstream impacts of proposed flood solutions. A Capital Improvement Plan
(CIP) was developed consisting of over 180 measures that together would provide 100-year level of
flood protection valley wide. A one-hundred-year flood is a flood event that has a 1% probability of
occurring in any given year. That means that it has a 26 percent chance of occurring during a 30-year
period, the length of many mortgages.
http://www.waterplan.water.ca.gov/docs/cwpu2005/vol4/vol4-hydrologyfrequencyof100yearflood.pdf
In-creek improvements, such as bridge replacements, building removals and creek widening, were
examined first. Those measures were not enough to contain the 100-year flood, so detention basins
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were determined to be necessary. Memorial Park was one of five detention basins in the CIP that,
together with the 180 measures, would provide the 100-year level of flood protection in Ross Valley.
http://www.marinwatersheds.org/documents/CIPStudyReportMay2011.pdf
The County has identified a subset of initial high priority CIP measures that would provide a 25-year
level of flood protection valley wide and be completed within 10 years. Funding would come from the
Ross Valley Flood Fee, contributions from the Towns, grants, and outside sources.
http://www.marinwatersheds.org/documents/25yearplantechmemo.pdf
One of the larger projects in the plan, the Memorial Park detention basin, was awarded an $8 million
dollar grant by the State Department of Water Resources, but the project was barred by a public
initiative in the November 2015 election.
The Town of San Anselmo currently has funding for the replacement of three bridges that contribute to
flooding. The three bridges are the Nokomis, Madrone, and Center Blvd. bridges. Once these bridges
are replaced more water will be released downstream, necessitating the need for upstream detention
and/or downstream berms and walls to prevent flooding downstream.
Along with the bridges the Town has been working on grants to obtain and remove Building Bridge
Two (located next to Creek Park), which is a major cause of flooding in San Anselmo because it is two
feet lower in the creek than any other building. The State of California and the Federal government, in
their analysis of the grant application, indicated that removal of this building is a priority. Part of the
motivation to get this Local Hazard Mitigation Plan updated and approved by FEMA is to be eligible for
their Pre-Disaster Mitigation grant in the spring of 2016.
San Anselmo Public Works has been working with the Flood Control District for four years on a
successful program to manage vegetation in the creek. San Anselmo staff walk all the creeks every year
and identify problem areas, then use either abatements or the Conservation Corps North Bay to
remove hazards. This work is then covered under Marin County’s routine maintenance agreement
permits with the State and Federal agencies.
San Anselmo has been accepted into a FEMA program, The Community Rating System (CRS) as a class 9
community. CRS is a voluntary program that encourages and rewards communities for going beyond
FEMA’s National Flood Insurance Program (NFIP) minimum requirements. By joining CRS, the Town
earns flood insurance premium reduction for its residents.
1.
2.
3.
4.
The insurance premium reductions we would get from membership in CRS range from 5% to 45%
depending on our classification which range from a 9 down to a 1, respectively. The ratings and their
annual associated savings are as follows:
A 9 rating saves the community $30,000 as a whole;
A rating of 8 equals $57,000 in savings;
A rating of 7 equals $84,000 in savings;
A rating of 6 equals $113,000 and so on.
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Our rating is determined by the number of activities for which the Town gets credit. Examples of the
eligible activities include providing public information, active floodplain management, and flood
preparedness such as a flood warning system. San Anselmo already engages in many of these
activities, although the credit awarded depends on how our documentation meets the requirements.
One particular CRS activity that the Town is developing is a Program for Public Information, or PPI,
which is a mechanism to assess and improve the outreach that we do. The PPI develops a document
that is approved by Town Council and guides the Town’s flood-related outreach.
In 2015, the Town adopted new requirements for drainage plans and storm water runoff and design
review criteria related to low impact development. The new regulations will help to minimize storm
water runoff from new development by reducing impervious surfaces, encouraging the use of
permeable surfaces, dispersing storm water runoff on site, and storing storm water for reuse or slow
release so it can naturally infiltrate the ground.
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Town of San Anselmo
FEMA Flood Zones
37
Wildfire Hazard Profile
Description
(Source: Marin County Hazard Mitigation Plan)
The Town of San Anselmo is within the Wildland-Urban Interface (WUI). The Town borders directly on
the open space lands of the Marin Municipal Water District. The hillsides and canyons carry the
potential of high fire danger. The potential of wild land fire is an extreme risk to all areas within the
Town, not just hillside areas. The fire season generally lasts from five to six months, when there is little
rain.
Access to the adjacent open space areas and the hillside and canyon areas is limited by few access
routes and narrow roads. There is limited water availability, water pressure, and water flow in certain
areas within the Town. The wildland fire hazard is caused by a combination of factors including hillside
terrain, highly flammable vegetation and forest, long summers, and human activity. There are heavy fuel
loads. Many homes have been built on steep slopes with vegetation in close proximity. The onset of
Sudden Oak Death (SOD) has significantly increased the number of dead or weakened trees in the areas,
which contributes to the fuel loads. The loss of oaks results in the increase in more fire hazardous trees,
such as bays.
Wind is a predominant factor in the spread of fire. Marin County has a characteristic northwest wind
that originates from the Pacific Ocean and will frequently become a factor in fire suppression efforts.
During the dry season, the county also experiences occasional strong northeast winds.
Wildfires cause secondary hazards of flooding and landslides after slopes are stripped of vegetation and
exposed to greater amounts of runoff. Wildfires also expose people to smoke, a health concern.
Location & Extent
CalFIRE has developed several maps depicting wildfire hazard areas. The two most useful maps are
those depicting Wildland Urban Interface (WUI) wildfire threat and wildfire threat from wildland fuels in
State Responsibility Areas. The WUI map depicts communities within 1.5 miles of a potential wildfire
source, as determined by CDF-FRAP fuel and hazard data. These maps indicate that the majority of the
Town of San Anselmo is within the area of considered a WUI wildfire threat.
Wildfires have the potential to damage and destroy thousands of acres of land, destroy many homes
and result in deaths. The Town of San Anselmo currently has approximately 2243 homes located in the
WUI preventing firefighting and safe evacuation.
Previous occurrences of the hazard
Since record keeping began in 1859, major fires have periodically raged through Marin County. An 1881
fire burned an estimated 65,000 acres from Corte Madera to the top of Mt Tamalpais. An 1890 fire
burned over 8,000 acres. An 1891 fire that began in Bill Willaiam’s Gulch (at the Base of Mt Tamalpais)
burned over 12,000 acres. The 1929 Mill Valley fire burned 1,000 acres and destroyed 110 homes in Mill
Valley. A 1945 fire burned 20,000 acres of watershed land. In 1995 the Mount Vision Fire burned more
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than 12,000 acres of Point Reyes National Seashore in West Marin and destroyed 48 homes. The largest
urban-wildland fire in the Bay Area, the 1991 fire in the East Bay Hills, resulted in $1.7 billion in losses. In
that fire, 3,354 family dwellings and 456 apartments were destroyed, while 25 people were killed and
150 people were injured.
Wildfire is a probable hazard, and the Town of San Anselmo could sustain severe damage from a large
devastating wildland fire. Times of drought and seasonal high winds increase the probability. An
earthquake that damages gas pipelines and water pipelines could simultaneously increase the risk of
wildland fire and also decrease the Town’s ability to suppress it.
The majority of the Town of San Anselmo (approximately 2243 residences, 6 MMWD water tanks and
pump stations, Ross Valley School District, 3 Schools) is in the Wildland Urban Interface (WUI) wildfire
threat areas. There are also several potential parcels that could be developed in the future.
Many residences in the high wildfire threat areas were built prior to code changes and have wood
shingle siding and some have wood shake roofs. Residences may be surrounded by flammable
vegetation. Certain areas of the Town have water pressure and water flow that do not meet current
standards.
The Town seeks to minimize risk by regulating the safety of new structures and by vegetation
management. The Town applies fire-safe construction standards, greater emphasis on fire equipment
access and improved water supply with new development. Sprinklers are required on all new and
significantly remodeled residences.
The Town would send recorded emergency announcements by phone to subscribers in the Marin
Emergency Alert Notification System (MEANS) or by public address from a passing Law Enforcement
patrol car.
The Ross Valley Fire Department, like any other jurisdiction in Marin County, would not have sufficient
resources to fight a wildland fire. In the event of a major wildland fire, every jurisdiction in Marin County
and numerous state and federal agencies would be tapped for equipment under mutual aid agreements.
The Town critical facilities are located within the center of the Town and further from the high wildfire
threat areas. A wildland fire would destroy transmission lines in the area of the fire. Underground
pipelines would not be particularly vulnerable to damage from wildfires.
Wildfires are very costly. The cost of fire suppression can be over $1 million dollars per day. The Mount
Vision Fire of 1995 in West Marin is an example of a very damaging and costly fire. Fire suppression cost
$6 million dollars. Structural damage for the loss of 48 homes and 18 with substantial damage reached
$23 million dollars. The utility repair costs reached $1.3 million dollars. Stabilizing roads and slopes for
erosion control cost $1.3 million. (Marin Operational Area Hazard Mitigation Plan)
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The 2014 King Fire that burned near Pollock Pines, El Dorado County in the Lake Tahoe region burned
97,717 acres, destroyed 12 residences and 68 accessory structures (80 total buildings), and with 12
injuries reported. The cost to extinguish the King Fire was well over 91 million dollars.
The median cost of a residence in San Anselmo is between $1 million to $1.2 million dollars. The average
construction cost in San Anselmo is approximately $350 per square foot. The replacement cost of
structures alone in San Anselmo after a wildland fire, would exceed $1 billion (not including contents).
Additional costs associated with the loss of homes to wild land fire include disruption of utilities,
transportation, and other public services. In addition, there are lost wages, costs of temporary shelter,
and other costs that cannot be captured easily.
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41
Hazardous Material Incident Hazard Profile
Description
Hazardous Materials are substances which because of quantity, concentration or characteristics may
cause or significantly contribute to an increase in death, serious injury or pose substantial hazards to
humans or the environment.
Location & Extent
Hazardous Materials incidents, wherein their release induces cleanup or mitigation response, are
unpredictable and can occur across a wide range of scales ranging from a nuclear bomb to a paint spill.
Accordingly, the responsibility for mitigation and response occurs in five response levels through the
Standardized Emergency Management System (SEMS). Local government is the first level and the Marin
Operational Area is the second.
According to the State of California Office of Emergency Services, the most common release of
Hazardous Materials is the release of petroleum products, such as diesel fuel or gasoline. The most
common release locations are fixed facilities, which involve 25% of all incidents. Frequently the release
is due to abandonment or an intentional act. San Anselmo does not have a fixed Hazardous Materials
facility, nor is it known to be at risk of any specific type of Hazardous Materials incidents. Hazardous
Materials incidents in San Anselmo would most likely occur on the access roads along Sir Francis Drake
Blvd and Red Hill Avenue. An incident involving a gasoline tanker truck is of greatest concern.
Utility companies provide services and maintain facilities that make them susceptible to release of
Hazardous Materials. PG&E has natural gas transmission lines throughout the town including a large
pipe under Red Hill Avenue to the Hub. One of the main tenants of PG&E’s safety plan is the
Underground Service Alert program. By dialling 811 two or more days before digging, the USA system
alerts utility companies and gives them a chance to mark where pipes are located underground. PG&E is
also actively replacing its aging nautral gas lines throughout Town.
Ross Valley Sanitary District (RVSD), whose sanitary sewer lines run throughout Town, is required by the
State Water Resources Control Board, and the Regional Water Quality Control Board, to create and
operate under its own Sewer System Management Plan （RVSD，2013）. The SSMP describes the
agency’s wastewater collection system management activities, including the protocol for handling
Sanitary Sewer Overflows (SSOs) and other emergencies, in general. The SSMP has “Elements”, or topics
of concern, that the State requires the collection system agency to consider, discuss, and address and
document. Specifically, there is a section called “Element VI Sanitary Sewer Overflow Emergency
Response Plan” that describes our emergency response, including notifications, response activities, and
documentation.
Existing Mitigation and Response
Ross Valley Fire Department, which participates in the Marin County Fire Chiefs’ Hazardous Materials
Response Team, responds to Hazardous Materials incidents. This team is created through a Joint
Powers Agreement (JPA) between all fire departments within Marin County. The team consists of
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members from every department. Depending upon the degree of hazard, the response team may be
activated in the event of an incident. On June 9, 2015 San Anselmo Town Council approved a one-year
extension to the JPA while the team works to update the agreement for a longer period:
http://sananselmo-ca.granicus.com/MetaViewer.php?view_id=1&clip_id=72&meta_id=7901
Marin County Certified Unified Program Agency (CUPA) regulates the storage of Hazardous Materials in
San Anselmo. The County of Marin has developed a comprehensive Hazardous Materials Area Plan. In
addition, the County has adopted and maintains a Hazardous Materials Business Plan Program. More
information can be found on the Marin County Public Works website:
http://www.marincounty.org/depts/pw/divisions/cupa
Marin County Department of Environmental Health is responsible for responding to sewage spills into
waterbodies.
The Town of San Anselmo is part of Marin County Stormwater Pollution Prevention Program
(MCSTOPPP) which has developed an Illicit Discharge and Spill Response Plan as part of its compliance
with the State Water Quality Control Board. This plan outlines response and reporting for smaller-scale
pollution events.
http://www.marincounty.org/~/media/files/departments/pw/mcstoppp/municipalities_only/e9illicitdsp
illrespplan.pdf?la=en
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Mitigation Strategy
Local Hazard Mitigation Goals
The Town’s hazard mitigation goals were created this year to summarize the intention of the 250
individual strategies.
All Hazards (AH)- The Town endeavors to undertake effective emergency preparedness planning in
cooperation with other public agencies and local organizations, publicize emergency plans, provide
information on disaster preparedness to residents and businesses, and continue essential Town
emergency public services during natural disasters.
Earthquakes (EQ)- The Town endeavors to maximize protection of its residents and infrastructure by
permitting, maintaining, and educating about structures that are suited to withstand earthquakes.
Landslides (LS)- At the time a development is proposed, San Anselmo geologic and slope stability maps
should be reviewed to assess potential geologic hazards. In addition, suitability for development must
be based on site-specific geotechnical investigations.
Wildfire (WF)-Ross Valley Fire Department endeavors to continue to protect against wildfires through
fire resistant design and development, protective landscaping practices, and ensuring access for
emergency vehicles.
Hazardous Materials Incidents (HM)- The Town endeavors to prevent such incidents by proactively
working with PG&E and RVSD on preventative maintenance and by requiring the proper use, storage,
and disposal of hazardous materials.
Flooding (FL)- The Town endeavors to reduce the impact of flooding by effectively communicating and
cooperating with all levels of stakeholders as it implements projects outlined in the Flood Control
District 10-year workplan. On the federal level the Town wants to work with FEMA to increase its CRS
score. On the State level it wants to work with agencies to obtain permits and funding for projects. At
the County level it aspires to collaborate effectively with the County Flood Control District and adjacent
Towns on a watershed-wide plan. On the local level it aspires to reap benefits of natural floodplain
functions such as permeable surfaces, natural channels and creek setbacks. Finally, the Town will
protect its residents and their houses by requiring that all new construction and substantial remodels
comply with the Town’s floodplain regulations.
Dam Failure (DF)- Dam failure carries a relatively small risk to the Town of San Anselmo, but nonetheless
the Town endeavors to protect residents of the mapped inundation areas by reviewing reports
generated as part of the Flood Control District’s Phoenix Lake detention basin retrofit proposal.
Drought (DR)- The Town endeavors to promote regional resilience against the effect of droughts
through practices that conserve municipal water and maximize infiltration of rainwater both internal to
the Town’s practices and as promoted to the public.
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2015 Strategy Development
Updating the list of strategies is intended to carry the valuable information from the existing plan
forward and to reference any new plans, policies, or information. Because this plan update is a
transition away from the ABAG multi-jurisdictional LHMP, 171 of the 410 old strategies were removed
because they were not applicable or inappropriate for San Anselmo’s specific risks. The process of
updating the specific strategies went as follows. Team members reviewed sections of the 2010 strategy
spreadsheet with responsibilities corresponding to their departments. Team members also reviewed
corresponding to strategies in the Ross LHMP. Strategies that had been deemed ‘Not Applicable, Not
Appropriate, or Not Cost Effective’ were removed from the spreadsheet unless for some reason this
condition had changed. The excel workbook containing last year’s strategies was compiled from four
tabs onto one. The sections, such as Housing, Government, Land, and Economy were combined and
each strategy was renumbered to include the reference to the section it came from.
Evaluation of Progress from 2010 Plan
In 2010, mitigation actions and priorities were identified. The attached list indicates each of the high or
very high strategies identified, along with responsible party, action taken, and/or current status of
progress.
2010 San Anselmo High Priority Actions
2015 Evaluation of Progress
The Town is participating in the Ross Valley
The Town is still participating in the Ross Valley
Watershed group, which is how priorities were set
Watershed program which still aligns with its
for flooding hazard mitigation. A successful local
flood hazard mitigation priorities. The flood fee
election has created a flood fee generating
continues to fund updates to the hydrologic
revenues to fund watershed wide flood mitigation
model.
projects through the local flood control district. A
The Town is in the preliminary engineering
hydrologic study has been completed that
phase of replacing Nokomis, Madrone, and
encompasses the entire Ross Valley watershed in
Center Boulevard bridges.
order to determine the effects of potential flood
Memorial Park Detention Basin was voted
mitigation projects. Federal grant applications have down by initiative, barring future consideration
been submitted by the Town to rebuild 4 bridges.
of the park as a detention basin, however other
Preliminary planning / study is ongoing regarding
detention basins higher in the watershed are
the creation of a detention basin in Memorial Park. still possible.
The Town is studying the possible effects of
Building Bridge #2 is grant-ready and unfunded.
removal of building bridges with willing property
owners – Town of San Anselmo and Flood Zone
Nine, local flood fee, state and federal grants, 10 –
15 years. (GOVT-d-3)
As new flood-control projects are completed,
FEMA updated flood maps of San Anselmo
request that FEMA revise its flood-insurance rate
March 2014. No flood-control projects have
maps and digital Geographic Information System
been completed since 2010, but the Town will
(GIS) data to reflect flood risks as accurately as
carry this action forward.
possible – ongoing project, Planning and Building
Dept. (GOVT-d-4). The high priority for this
mitigation task is based on town resident input at
NFIP flood map update information meetings held
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in the town.
Enforce and/or comply with the hazardous
materials requirements of the State of California
Certified Unified Program Agency (CUPA) – Ross
Valley Fire Department, ongoing project. (ENVI-a-9)
Obtain a new emergency generator for the Town
Corporation Yard – Public Works Department,
ongoing project. (INFR-a-8)
Ross Valley Fire to work with other Marin County
Fire agencies and Marin Municipal Water District to
review and update MMWD Fireflow Master Plan to
improve the water distribution system. (INFR-c-2)
Seek grant funding for vegetation removal along
roadways and roadside collection/ chipping of
hazardous vegetation within the Wildland-Urban
Interface. (ECON-e-6,j-9)
Practice and promote sustainable building practices
using the U.S. Green Building Council's LEED
program or a similar system. (ENVI-b-8)
Ongoing- carry forward
Since the 2010 plan, this task was reevaluated
and priority was lowered. At the time, the
corporation yard was being considered as a
new EOC location, but due to the remote
location and lack of cellular service there it has
since been removed from consideration.
Town DPW still plans on getting a generator
there, but not for powering the EOC.
MMWD- RVFD identified low fire flow areas
within our jurisdictional boundaries. These
areas needed either upgraded mains and/or
additional fire hydrants. The areas were
prioritized and placed on the MMWD Fire
Flow Improvement Program. The last project
is scheduled for completion in 2027
RVFD received a PG&E grant for vegetation
clearance in 2015. Addition grant applications
will be submitted in the future for more
funding .
Green Building Ordinance Resolution 3925
adopted September 14, 2010
Evaluation of On-Going Mitigation Strategy Programs
The Town has many on-going mitigation programs that help create a more disaster-resistant region. The
following were those strategies identified as Existing Programs in the 2010 mitigation strategy
spreadsheet. All of these strategies continue to be Existing Programs and were included such in the
current plan update.
Continued development of interoperable communications for first responders from cities, counties,
special districts, state, and federal agencies. (GOVT-c-7);
Maintain and update the Town’s Standardized Emergency Management System Plan (GOVT-c-12);
Participation in general mutual-aid agreements and agreements with adjoining jurisdictions for
cooperative response to fires, floods, earthquakes, and other disasters (GOVT-c-13);
Participation in FEMA’s National Flood Insurance Program (GOVT-d-5)
Continue to sponsor the formation and training of Community Emergency Response Teams (CERT)
and Get Ready Marin through partnerships with local businesses (GOVTc-3, ECON-j-5, HWNG-k-6);
Incorporate FEMA guidelines and suggested activities into local government plans and procedures for
managing flood hazards (LAND-c-2);
Increase efforts to reduce landslides and erosion in existing and future development through
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continuing education of design professionals on mitigation strategies (HSNG—i2, ECON-g-2);
Continue to repair and make structural improvements to storm drains, pipelines, and/or channels to
enable them to perform to their design capacity in handling water flows as part of regular
maintenance activities (INFR—d-6, INFR-d-7)
Ross Valley Fire to continue annual defensible space and resale inspections within the Wildland-Urban
Interface. (ECON-,e-1,e-6, INFR-c-3 )
Continue enforcement of State and local Building Code and Fire Code ordinances as they apply to new
development and remodels within the Wildland-Urban Interface. (ECON-e1, INFR-c-4, c-5,c-6)
New Mitigation High-Priority Strategies
The planning team identified, considered and analyzed a comprehensive range of specific mitigation
actions and projects to reduce the effects of each hazard. Factors considered to select mitigation
measures included: 1.) public support for the mitigation action, 2.) feasibility and any secondary
impacts, 3.) anticipated staffing, funding, and maintenance requirements to determine if the Town has
the personnel and administrative capabilities necessary to implement the action or whether outside
help would be needed, 4.) legal authority to implement the action, 5.) budget constraints and cost (“Big
ticket” mitigation actions have been considered for implementation where additional Federal and State
funding may be available), and 6.) impact on the environment and historic structures.
Prioritization of mitigation strategy
The following table defines the priorities for mitigation used by the planning team to designate the
priority for each mitigation strategy:
Existing Program
Existing program underfunded
Very High Priority
High Priority- Actively Looking For Funding
Moderate
This is an official program or strategy that is currently
occurring and generally receives adequate funding.
This is an existing program that has recently
received less funding than needed to maintain the
program or strategy to its full potential. Additional
funding is needed to effectively carry out this
strategy. In some cases the Town has deferred this
strategy due to lack of funding.
This is a program which is considered to be a v e r y
high priority. Some of these might be ongoing activities
that should be expanded.
This is a program which is considered to be a high
priority and for which funding is being sought.
This is a strategy which is deemed beneficial, but for
which funding is not actively being sought. The Town
would consider implementing this strategy if funding
became available, but it is not deemed a high priority.
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Very High Priority Strategies
2009-2010 Strategy Number
AH-1
GOVT-a-4
EQ-1
INFR-b-9, GOVT-a-3
FL-1
INFR-d-11
FL-2
INFR-d-16
FL-3
INFR-d-17
FL-4
new
FL-5
INFR-d-5
Applicable Hazards
2015 Strategy Number
Specific Mitigation Strategy (Orange Shading indicated
Climate Adaptation Strategies)
Conduct comprehensive programs to identify and
mitigate problems with facility contents, architectural
components, and equipment that will prevent critical
buildings from being functional after major natural
disasters. Such contents and equipment includes
computers and servers, phones, files, and other tools
used by staff to conduct daily business.
Clarify to workers in critical facilities and emergency
personnel, as well as to elected officials and the public,
the extent to which the facilities are expected to perform
only at a life safety level (allowing for the safe evacuation
of personnel) or are expected to remain functional
following an earthquake.
Identify critical locally-owned bridges affected by flooding
and either elevate them to increase stream flow and
maintain critical ingress and egress routes or modify the
channel to achieve equivalent objectives.
Work for better cooperation among the patchwork of
agencies managing flood control issues.
AH
Improve monitoring of creek and watercourse flows to
predict potential for flooding downstream by working
cooperatively with land owners and the cities and
counties in the watershed.
Continue Mapping of the creek to further evaluate,
design, and implement additional flood control projects
Pursue funding for the design and construction of storm
drainage projects to protect vulnerable properties,
including property acquisitions, upstream storage such as
detention basins, and channel widening with the
associated right-of-way acquisitions, relocations, and
environmental mitigations.
FL
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EQ
FL
FL
FL
FL
FL-6
INFR-d-9
FL-7
new
FL-8
new
FL-9
GOVT-c-20
FL-10
GOVT-d-3
WF-1
HSNG-g-11
Develop an approach and locations for various
watercourse bank protection strategies, including for
example, (1) an assessment of banks to inventory areas
that appear prone to failure, (2) bank stabilization,
including installation of rip rap, or whatever regulatory
agencies allow (3) stream bed depth management using
dredging, and (4) removal of out-of-date coffer dams in
rivers and tributary streams.
Working with stakeholders and the community, consider
feasibility (including cost, funding, environmental and
downstream impacts) and options for purchasing and
removal of Building Bridge 2; the structure at 634-636 San
Anselmo venue which is a major flow constriction at flood
levels.
Working with stakeholders and the community, consider
feasibility (including cost, funding, environmental and
downstream impacts) and options for removal of
Morningside Avenue Bridge and potential construction of
upstream and downstream extended wingwalls.
Create and maintain an automated system of rain and
flood gauges that is web enabled and publicly-accessible.
Work toward creating a coordinated regional system.
Recognize that a multi-agency approach is needed to
mitigate flooding by having flood control districts, cities,
counties, and utilities meet at least annually to jointly
discuss their capital improvement programs for most
effectively reducing the threat of flooding. Work toward
making this process more formal to insure that flooding is
considered at existing joint-agency meetings.
Work with residents to ensure adequate plans are
developed for appropriate access and evacuation in
wildland-urban-interface areas exposed to high-toextreme fire threat.
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FL
FL
FL
FL
FL
WF
High Priority Strategies- Actively Looking for Funding
AH2
HSNG-k-3
AH3
HSNG-k-4
AH4
HSNG-k-5
AH5
GOVT-b-1
AH6
GOVT-b-2
EQ2
ECON-j-7
EQ3
ECON-b-4
Applicable Hazards
Specific Mitigation Strategy (Orange Shading indicated Climate
Adaptation Strategies)
Inform residents of comprehensive mitigation activities, including
elevation of appliances above expected flood levels, use of fireresistant roofing and defensible space in high wildfire threat and
wildfire-urban-interface areas, structural retrofitting techniques for
older homes, and use of intelligent grading practices through
workshops, publications, and media announcements and events.
Develop a public education campaign on the cost, risk, and benefits of
earthquake, flood, and other hazard insurance as compared to
mitigation.
Use disaster anniversaries, such as April (the 1906 earthquake),
September (9/11), and October (Loma Prieta earthquake and Oakland
Hills fire), to remind the public of safety and security mitigation
activities.
Establish a framework and process for pre-event planning for postevent recovery that specifies roles, priorities, and responsibilities of
various departments within the local government organization, and
that outlines a structure and process for policy-making involving
elected officials and appointed advisory committees.
Prepare a basic Recovery Plan that outlines the major issues and tasks
that are likely to be the key elements of community recovery, as well
as integrate this planning into response planning (such as with
continuity of operations plans).
Make use of the materials developed by others (such as found on
ABAG’s web site at http://quake.abag.ca.gov/business) to increase
mitigation activities related to earthquakes.
Conduct an inventory of privately-owned existing or suspected softstory structures as a first step in establishing voluntary or mandatory
programs for retrofitting these buildings.
50
AH
AH
AH
AH
AH
EQ
EQ
EQ4
HSNG-c-6
EQ5
ECON-c-3
FL11
INFR-d-1
FL12
FL13
New
FL14
new
FL15
HSNG-h-9
FL16
LS-1
New
WF2
ECON-e-2,
Hsng-g-2
WF3
HSNG-g-9
WF4
HSNG-k-14
WF34
ECON-j-4
ECON-j-8,
HSNG-k-13
HSNG-i-1,
ECON-g-1
Use the soft-story inventory to require private owners to inform all
existing and prospective tenants that they live in this type of building
and may need to be prepared to live elsewhere following an
earthquake if the building has not been retrofitted.
Require private owners to inform all existing tenants (and prospective
tenants prior to signing a lease agreement) that they work in an
unreinforced masonry building and the standard to which it may have
been retrofitted.
Improve upon existing hydrologic analysis of runoff and drainage
systems to predict areas of insufficient capacity in the storm drain and
natural creek system.
Integrate future flood control and water quality protection planning
efforts in a Stormwater Resource Plan
Develop the “Village Volunteers” campaign encouraging private
businesses and residents to keep storm drains in their neighborhood
free of debris.
Continue to develop guidelines that limit the coverage of impervious
surfaces, that require the use of permeable surfaces, that implement
other regulations to effectively channel and minimize site runoff, and
that allow water to percolate into the ground.
As funding opportunities become available, encourage home and
apartment owners to participate in elevation and floodproofing
programs for areas within flood plain.
Develop a stormwater master plan
EQ
Increase efforts to reduce landslides and erosion in existing and future
development by improving appropriate code enforcement and use of
applicable standards for private property.
Tie public education on defensible space and a comprehensive
defensible space ordinance to a field program of enforcement.
LS
Expand vegetation management programs in wildland-urbaninterface
fire-threatened communities or in areas exposed to high-to-extreme
fire threat to more effectively manage the fuel load through roadside
collection and chipping, mechanical fuel reduction equipment, selected
harvesting, use of goats or other organic methods of fuel reduction,
and selected use of controlled burning.
Encourage the formation of a community- and neighborhood-based
approach to wildfire education and action through local Fire Safe
Councils and the Fire Wise Program. This effort is important because
grant funds are currently available to offset costs of specific councilsupported projects.
Inform San Anselmo's residents and private business owners of
mitigation activities, including elevation of appliances above expected
flood levels, use of fire-resistant roofing and defensible space in
wildland-urban-interface fire-threatened communities or in areas
exposed to high-to-extreme fire threat, structural retrofitting
WF
51
EQ
FL
FL
FL
FL
FL
FL
WF
WF
WF
FL
techniques for older buildings, and use of intelligent grading practices
through workshops, publications, and media announcements and
events.
WF35
HSNG-g-17
Ensure that city/county-initiated fire-preventive vegetationmanagement techniques and practices for creek sides and high-slope
areas do not contribute to the landslide and erosion hazard. For
example, vegetation in these sensitive areas could be thinned, rather
than removed, or replanted with less flammable materials. When
thinning, the non-native species should be removed first. Other
options would be to use structural mitigation, rather than vegetation
management in the most sensitive areas.
WF
LS
Climate Adaptation Strategies
The Town will follow the recommendations of ABAG regarding recognizing the effects of climate change
on the local environment and strategies to adapt to it. Strategies related to climate adaptation have
been shaded orange in the complete strategies table below. That is 67 or 216 strategies, or
approximately 30%. For example, four important strategies addressing climate adaptation are:
Update and continue to implement Climate Action Plan which inventories global warming emissions of
operations and in the community & sets reduction targets. (AH-15)
Help educate the public, schools, other jurisdictions, professional associations, business and industry
about climate action and adaptation. (AH-14)
Conduct and/or promote attendance at local or regional hazard conferences and workshops for elected
officials and staff to educate them on the critical need for programs in mitigating earthquake, wildfire,
flood, landslide hazards, and climate adaptation. (AH-45)
Maintain healthy urban forests; promote tree planting to increase shading and to absorb CO2. (AH-42)
In general the three major hazards posed by climate change, primarily extreme weather, are deemed to
be:



Drought (e.g., vegetation damage, invasive pests)
Floods (e.g. local and town flooding and resulting damage to life and property; landslides)
Wild Fires (e.g., result of drought, ignited by extreme weather, wild-urban interface zone)
In general those activities regarding resiliency as called out in ABAG’s Resilience Program website
(http://resilience.abag.ca.gov/projects/2016-mitigation-adaptation-plans) and California Climate Change
Adaption Plan website (http://www.climatechange.ca.gov/adaptation/index.html) will form the
foundation for the Town’s climate change adaption plan.
The following list highlights those programs identified in the mitigation strategy spreadsheet as
addressing the top three hazards:
52
Complete Strategy Table
The spreadsheet details the department(s) responsible for implementing the actions. All actions will be
funded by the Town general fund or grant funding. The timeframe to complete each action is provided.
53
GOVT-a-4
AH-2
HSNG-k-3
AH-3
HSNG-k-4
AH-4
HSNG-k-5
AH-5
GOVT-b-1
AH-6
GOVT-b-2
AH-7
LAND-g-1
new
AH-8
AH-9
AH-10
ECON-i-5
new
Use hazard abatement districts as a funding mechanism to ensure that mitigation
strategies are implemented and enforced over time.
Create incentives for private owners of historic or architecturally significant buildings to
undertake mitigation to levels that will minimize the likelihood that these buildings will need
to be demolished after a disaster, particularly if those alterations conform to the federal
Secretary of the Interior’s Guidelines for Rehabilitation.
Develop and enforce a repair and reconstruction ordinance to ensure that damaged
buildings are repaired in an appropriate and timely manner and retrofitted
concurrently. This repair and reconstruction ordinance should apply to all public and
private buildings, and also apply to repair of all damage, regardless of cause. See
http://quake.abag.ca.gov/recovery/info-repair-ord.html.
Review and, if necessary, update evacuation plans. Consider organizing evacuation drills.
54
Existing Program, underfunded
Existing Program
X
Moderate
AH
High - Actively Looking for Funding
Very High Priority
Conduct comprehensive programs to identify and mitigate problems with facility
contents, architectural components, and equipment that will prevent critical buildings
from being functional after major natural disasters. Such contents and equipment
includes computers and servers, phones, files, and other tools used by staff to
conduct daily business.
Inform residents of comprehensive mitigation activities, including elevation of
appliances above expected flood levels, use of fire-resistant roofing and defensible
space in high wildfire threat and wildfire-urban-interface areas, structural retrofitting
techniques for older homes, and use of intelligent grading practices through
workshops, publications, and media announcements and events.
Develop a public education campaign on the cost, risk, and benefits of earthquake,
flood, and other hazard insurance as compared to mitigation.
Use disaster anniversaries, such as April (the 1906 earthquake), September (9/11),
and October (Loma Prieta earthquake and Oakland Hills fire), to remind the public of
safety and security mitigation activities.
Establish a framework and process for pre-event planning for post-event recovery that
specifies roles, priorities, and responsibilities of various departments within the local
government organization, and that outlines a structure and process for policy-making
involving elected officials and appointed advisory committees.
Prepare a basic Recovery Plan that outlines the major issues and tasks that are likely
to be the key elements of community recovery, as well as integrate this planning into
response planning (such as with continuity of operations plans).
Applicable Hazards
AH-1
Specific Mitigation Strategy (Orange Shading indicated Climate Adaptation
Strategies)
Responsible Agency or Department
(Required if Existing Program,
Existing Program under funded,
Very High, High, or Under Study)
Ordinance or Resolution # (if existing
program), Estimated Cost and Possible
Funding Agency (if high priority), Estimated
Date of Completion (if study), WHY if not
same as regional priority, OR Other
Comments
Town Hall
AH
X
Public Works / Building Official
As staff time allows
AH
X
AH
X
AH
X
Public Works/Fire/ Administration
AH
X
AH
X
Administration
AH
X
Planninng
AH
X
AH
X
Town Hall
Flood Zone 9, Ross Valley Watershed
AH-11
HSNG-a-1
AH-12
INFR-g-1
AH-13
ENVI-b-11
AH-14
ENVI-b-13
AH-15
ENVI-b-2
AH-16
ENVI-b-5
AH-17
ENVI-b-7
AH-18
ENVI-b-9
AH-19
GOVT-b-4
AH-20
GOVT-c-2
AH-21
AH-22
GOVT-b-5
GOVT-c-5
Assist in ensuring adequate hazard disclosure by working with real estate agents to
improve enforcement of real estate disclosure requirements for residential properties
with regard to seven official natural hazard zones: 1) Special Flood Hazard Areas
(designated by FEMA), 2) Areas of Potential Flooding from dam failure inundation, 3)
Very High Fire Hazard Severity Zones, 4) Wildland Fire Zones, 5) Earthquake Fault
Zones (designated under the Alquist-Priolo Earthquake Fault Zoning Act), and the 6)
Liquefaction and Landslide Hazard Zones (designated under the Seismic Hazard
Mapping Act).
Using social media and newsletters, provide information to the public related to
planning for power outages, family and personal planning for delays due to traffic or
road closures, or due to transit system disruption caused by disasters, coping with
reductions in water supply or contamination, or coping with disrupted storm drains,
sewage lines.
Increase recycling rates in local government operations and in the community.
AH
X
Planning & Building
AH
X
Administration
AH
X
Administration
AH
X
Administration
AH
X
Administration
AH
X
Administration
AH
X
Administration
AH
X
Administration
AH
X
Administration and Finance
Encourage your employees to have a family disaster plan.
AH
X
Administration and Finance
Plan for the emergency relocation of government-owned facilities critical to recovery,
as well as any facilities with known structural deficiencies or in hazardous areas.
AH
X
Administration and Finance; Police
Department
In progress.
Periodically assess the need for changes in staffing levels, as well as for additional or
updated supplies, equipment, technologies, and in-service training classes.
AH
X
All Town Departments, Ross Valley
Fire Department
Will be reassessed as funding levels
stabilize.
AH
X
Building Official
As staff time allows.
AH
X
County OES / Admin
Existing Program
Help educate the public, schools, other jurisdictions, professional associations,
business and industry about climate action and adaptation.
Update and continue to implement Climate Action Plan which inventories global
warming emissions of operations and in the community & sets reduction targets.
Increase the use of clean, alternative energy by, for example, investing in “green
tags”, advocating for the development of renewable energy resources, recovering
landfill methane for energy production, and supporting the use of waste to energy
technology.
Purchase only Energy Star equipment and appliances for local government use.
Increase the average fuel efficiency of municipal fleet vehicles; reduce the number of
vehicles; launch an employee education program including anti-idling messages;
convert diesel vehicles to bio-diesel.
Develop a continuity of operations plan that includes back-up storage of vital records,
such as plans and back-up procedures to pay employees and vendors if normal
finance department operations are disrupted, as well as other essential electronic
files.
AH-23
ECON-j-13
AH-24
GOVT-c-14
Distribute appropriate materials related to disaster mitigation and preparedness to
private business owners. Appropriate materials are (1) culturally appropriate and (2)
suitable for special needs populations. For example, such materials are available on
the http://www.preparenow.org website and from non-governmental organizations that
work with these communities on an on-going basis.
Install alert and warning systems for rapid evacuation or shelter-in-place. Such
systems include outdoor sirens and/or reverse-911 calling systems.
AH
X
Marin County OES
GOVT-c-11
Expand or participate in expanding traditional disaster exercises involving city and
county emergency personnel to include airport and port personnel, transit and
infrastructure providers, hospitals, schools, park districts, and major employers.
Participate in developing and maintaining a system of interoperable communications
for first responders from cities, counties, special districts, state, and federal agencies.
AH
X
Marin County; Marin Emergency
Radio Authority
AH-25
AH-26
GOVT-c-7
55
Climate Action Plan 2011
Disaster Recovery plan in final stages of
implementation for TH and PD, est.
2Q/2010- Find This
AH-27
AH-28
AH-29
GOVT-c-8
ECON-a-1
ENVI-a-1
AH-30
GOVT-d-10
AH-31
ENVI-b-3
AH-32
ENVI-b-4
AH-33
ENVI-b-6
AH-34
ENVI-b-8
AH-35
ENVI-a-11
AH-36
GOVT-a-13
AH-37
ENVI-a-2
AH-38
GOVT-a-5
AH-39
GOVT-c-10
AH-40
GOVT-c-12
AH-41
GOVT-c-4
AH-42
ENVI-b-12
Harden emergency response communications, including, for example, building
redundant capacity into public safety alerting and/or answering points, replacing or
hardening microwave and simulcast systems, adding digital encryption for
programmable radios, and ensuring a plug-and-play capability for amateur radio.
Assist in ensuring adequate hazard disclosure by working with real estate agents to
improve enforcement of real estate disclosure requirements for commercial and
industrial properties with regard to seven official natural hazard zones: 1) Special
Flood Hazard Areas (designated by FEMA), 2) Areas of Potential Flooding from dam
failure inundation, 3) Very High Fire Hazard Severity Zones, 4) Wildland Fire Zones,
5) Earthquake Fault Zones (designated under the Alquist-Priolo Earthquake Fault
Zoning Act), and the 6) Liquefaction and Landslide Hazard Zones (designated under
the Seismic Hazard Mapping Act).
Continue to enforce State-mandated requirements, such as the California
Environmental Quality Act, to ensure that mitigation activities for hazards, such as
seismic retrofits and vegetation clearance programs for fire threat, are conducted in a
way that reduces environmental degradation such as air quality impacts, noise during
construction, and loss of sensitive habitats and species, while respecting the
community value of historic preservation.
Cooperate with researchers working on government-funded projects to refine
information on hazards, for example, by expediting the permit and approval process
for installation of seismic arrays, gravity survey instruments, borehole drilling, fault
trenching, landslide mapping, flood modeling, and/or damage data collection.
Adopt and enforce land-use policies that reduce sprawl, preserve open space, and
create compact, walkable urban communities.
Promote transportation options such as bicycle trails, commute trip reduction
programs, incentives for car pooling and public transit.
Make energy efficiency a priority through building code improvements, retrofitting city
facilities with energy efficient lighting and urging employees to conserve energy and
save money.
Practice and promote sustainable building practices using Build it Green and the U.S.
Green Building Council's LEED program or a similar system.
When remodeling existing government and infrastructure buildings and facilities,
remove asbestos to speed up clean up of buildings so that they can be reoccupied
more quickly.
Ensure that any regulations imposed on private-owned businesses related to repair
and reconstruction (see "Economy Section") are enforced and imposed on local
government's own buildings and structures.
Encourage regulatory agencies to work collaboratively with safety professionals to
develop creative mitigation strategies that effectively balance environmental and
safety needs, particularly to meet critical wildfire, flood, and earthquake safety levels.
Encourage joint meetings of security and operations personnel at critical facilities to
develop innovative ways for these personnel to work together to increase safety and
security.
Maintain the local government’s emergency operations center in a fully functional
state of readiness.
Maintain and update as necessary the local government’s Standardized Emergency
Management System (SEMS) Plan and the National Incident Management System
(NIMS) Plan, and submit an appropriate NIMSCAST report.
AH
X
Marin County; Marin Emergency
Radio Authority
AH
X
Planning and Building
AH
X
Planning
AH
X
Building
AH
X
Planning & Building
AH
X
Planning & Public Works
AH
X
Planning & Building
AH
X
Planning & Building
AH
X
Public Works
AH
X
Building and Public Works
AH
X
Planning / Ross Valley Fire
Department
AH
X
Police Department
AH
X
Police & Admin
AH
X
Police Department / Marin County
OES
Updated 01/05
Periodically assess the need for new or relocated fire or police stations and other
emergency facilities.
AH
X
Police Department, Ross Valley Fire
Department
Will be reassessed as funding levels
stabilize.
Maintain healthy urban forests; promote tree planting to increase shading and to
absorb CO2.
AH
X
Public Works
56
Green Building Ordinance 2011
Ongoing
AH-43
GOVT-a-12
AH-44
GOVT-c-15
AH-45
GOVT-d-9
AH-46
HSNG-k-1
AH-47
AH-48
AH-49
AH-50
INFR-a-12
INFR-a-9
INFR-g-5
GOVT-a-10
AH-51
HSNG-k-2
AH-52
LAND-f-2
AH-53
LAND-f-3
AH-54
GOVT-a-1
AH-55
GOVT-a-2
AH-56
GOVT-c-16
AH-57
GOVT-b-3
AH-58
GOVT-c-25
AH-59
HSNG-a-3
AH-60
HSNG-a-4
AH-61
GOVT-c-1
Prior to acquisition of property to be used as a critical facility, conduct a study to
ensure the absence of significant structural hazards and hazards associated with the
building site.
Conduct periodic tests of the alerting and warning system.
Conduct and/or promote attendance at local or regional hazard conferences and
workshops for elected officials and staff to educate them on the critical need for
programs in mitigating earthquake, wildfire, flood, landslide hazards, and climate
adaptation.
Provide information to residents on the availability of interactive hazard maps on
ABAG’s web site and/or MarinMAps.
Encourage replacing above ground electric and phone wires and other structures with
underground facilities, and use the planning-approval process to ensure that all new
phone and electrical utility lines are installed underground.
Ensure that critical intersection traffic lights function following loss of power by
installing battery back-ups, emergency generators, or lights powered by alternative
energy sources such as solar. Proper functioning of these lights is essential for rapid
evacuation, such as with hazmat releases resulting from natural disasters.
Facilitate and/or coordinate the distribution of emergency preparedness or mitigation
materials that are prepared by others, such as by making the use of the internet or
other electronic means, or placing materials on community access channels or in city
or utility newsletters, as appropriate.
Ensure that new or significantly remodeled government-owned facilities comply with
and are subject to the same or more stringent regulations as imposed on privatelyowned development.
Develop printed materials, utilize existing materials (such as developed by FEMA and
the American Red Cross), conduct workshops, and/or provide outreach encouraging
residents to have family disaster plans that include drop-cover-hold earthquake drills,
fire and storm evacuation procedures, and shelter-in-place emergency guidelines.
Work to retrofit homes in older neighborhoods to provide safe housing.
Work to retrofit older downtown areas to protect architectural diversity and promote
disaster-resistance.
Assess the vulnerability of critical facilities (such as city halls, fire stations, operations
and communications headquarters, community service centers, seaports, and
airports) to damage in natural disasters and make recommendations for appropriate
mitigation.
Retrofit or replace critical facilities that are shown to be vulnerable to damage in
natural disasters.
Continue to enforce the location and design of street-address numbers on buildings.
Establish a goal for the resumption of local government services following an
emergency. May vary from function to function.
Support and encourage planning and identification of facilities for the coordination of
distribution of water, food, blankets, and other supplies, coordinating this effort with
the American Red Cross.
Develop a plan for short-term sheltering of residents in conjunction with the American
Red Cross.
Develop a plan for interim housing for those displaced by working with the Regional
Catastrophic Planning Grant Program (CPGP) that funded this effort in 2009.
Develop a plan for short-term and intermediate-term sheltering of Town employees.
57
AH
X
Public Works
Existing Program
AH
X
Public Works
AH
X
Public Works
AH
X
Public Works
AH
X
Public Works
Pacific Gas & Electric Rule 20A funding
required
AH
X
Public Works
In place at major intersections.
AH
X
Public Works
New program for flood materials per FEMA
CRS
AH
X
Public Works / Building
Town ordinance adbopting UBC, Ordinance
#: 1059, adopted 11/27/07
AH
X
Existing program for floods (per CRS)
expand to other hazards
AH
X
AH
X
AH
X
Public Works / Planning
AH
X
AH
X
Public Works / Planning/ Building
AH
X
AH
X
Recreation Department
AH
X
AH
X
AH
X
Recreation Departtment
AH-62
ECON-j-5
AH-63
GOVT-c-3
AH-64
HSNG-k-10
AH-65
AH-66
AH-67
INFR-g-7
GOVT-c-6
GOVT-c-13
AH-68
ENVI-b-1
AH-69
GOVT-d-1
AH-70
GOVT-d-2
AH-71
LAND-f-4
AH-72
AH-73
AH-74
AH-75
ECON-j-1
ECON-j-2
ECON-j-3
INFR-a-3
AH-76
GOVT-a-9
AH-77
INFR-a-8
Sponsor the formation and training of Community Emergency Response Teams
(CERT) training for other than your own employees through partnerships with local
private businesses.
AH
X
Ross Valley Fire Department
Offer CERT/GetReady type training to Town employees.
AH
X
Train homeowners to locate and shut off gas valves if they smell or hear gas leaking.
AH
X
Get Ready
AH
X
CERT and Get Ready Marin programs
ongoing.
AH
X
Ross Valley Fire Department / Police
Department
AH
X
Ross Valley Fire Department / Police
Department / Public Works
Marin Chiefs of Police Association
Protocols
AH
X
Planning
Town Council Resolution #3639, adopted
4/08/03
AH
X
Town Hall
AH
X
Town Hall
AH
X
Planning and Town Hall
Provide information to private business owners and their employees on the availability
of interactive hazard maps on MarinMap’s web site.
AH
X
All Town Departments, Ross Valley
Fire Department
Develop printed materials, utilize existing materials (such as developed by FEMA and
the American Red Cross), conduct workshops, and/or provide outreach encouraging
private businesses’ employees to have family disaster plans that include drop-coverhold earthquake drills, fire and storm evacuation procedures, and shelter-in-place
emergency guidelines.
AH
X
Ross Valley Fire Department/ Quality
of Life Committee
Develop and print materials, conduct workshops, and provide outreach to Town
private businesses focusing on business continuity and disaster preparedness
planning.
AH
X
Ross Valley Fire Department/
Economic Development Committee
AH
X
Public Works
Develop and distribute culturally appropriate materials related to disaster mitigation
and preparedness, such as those on the http://www.preparenow.org website related
to infrastructure issues.
Ensure that fire, police, and other emergency personnel have adequate radios,
breathing apparatuses, protective gear, and other equipment to respond to a major
disaster.
Continue to participate not only in general mutual-aid agreements, but also in
agreements with adjoining jurisdictions for cooperative response to fires, floods,
earthquakes, and other disasters.
Stay informed of scientific information compiled by regional and state sources on the
subject of rising sea levels and global warming, especially on additional actions that
local governments can take to mitigate this hazard including special design and
engineering of government-owned facilities in low-lying areas, such as wastewater
treatment plants, ports, and airports.
Promote information sharing among overlapping and neighboring local governments,
including cities, counties, and special districts, as well as utilities.
Recognize that emergency services is more than the coordination of police and fire
response; it also includes planning activities with providers of water, food, energy,
transportation, financial, information, and public health services.
Work with non-profits and through other mechanisms to protect as open space those
areas susceptible to extreme hazards (such as through land acquisition, zoning, and
designation as priority conservation areas).
Encourage the cooperation of utility system providers and other lifeline infrastructure
with San Anselmo and its municipal partners to develop strong and effective mitigation
strategies for infrastructure systems and facilities.
Assess the vulnerability of non-critical government facilities to damage in natural
disasters based on occupancy and structural type, make recommendations on
priorities for structural improvements or occupancy reductions, and identify potential
funding mechanisms.
Pre-position emergency power generation capacity (or have rental/lease agreements
for these generators) in critical buildings of cities, counties, and special districts to
maintain continuity of government and services.
58
AH
X
Building Official / Public Works
AH
X
Public Works / Police
Existing program; additionally, Get Ready
Marin courses given.
Open Space Committee
Generator still needed at Corp Yard
DAM-1
DR-1
GOVT-c-22
new
EQ-1
INFR-b-9, GOVT-a-3
EQ-2
ECON-j-7
EQ-3
ECON-b-4
EQ-4
HSNG-c-6
EQ-5
ECON-c-3
EQ-6
LAND-a-6
new
EQ-7
EQ-8
new
EQ-9
ECON-b-9,HSNG-c-9
EQ-10
ECON-c-4
EQ-11
HSNG-c-3
EQ-12
INFR-b-1
EQ-13
ECON-h-2
EQ-14
HSNG-e-3
EQ-15
INFR-b-8
Review and update mapped inundation areas procedures pursuant to the State Dam
Safety Act for the emergency evacuation of areas located below major water-storage
facilities as Phoenix Lake is converted into a detention basin with increased storage.
Continue to require projects to comply with the Town's water conserving landscape
ordinance and with MMWD water conservation ordinances.
Clarify to workers in critical facilities and emergency personnel, as well as to elected
officials and the public, the extent to which the facilities are expected to perform only
at a life safety level (allowing for the safe evacuation of personnel) or are expected to
remain functional following an earthquake.
Make use of the materials developed by others (such as found on ABAG’s web site at
http://quake.abag.ca.gov/business) to increase mitigation activities related to
earthquakes.
Conduct an inventory of privately-owned existing or suspected soft-story structures as
a first step in establishing voluntary or mandatory programs for retrofitting these
buildings.
Use the soft-story inventory to require private owners to inform all existing and
prospective tenants that they live in this type of building and may need to be prepared
to live elsewhere following an earthquake if the building has not been retrofitted.
Require private owners to inform all existing tenants (and prospective tenants prior to
signing a lease agreement) that they work in an unreinforced masonry building and
the standard to which it may have been retrofitted.
Recognizing that the California Geological Survey has not completed earthquakeinduced landslide and liquefaction mapping for much of the Bay Area, identify and
require geologic reports in areas mapped by others as having significant liquefaction
or landslide hazards.
Obtain a current initial earthquake performance evaluation of Town owned buildings (public
safety, Town Hall, post office). Inform staff, Town Council and the public, regarding the extent
to which the Town buildings may be affected by an earthquake and if they will only perform
at a life safety level (allowing for the safe evacuation of personnel) or are expected to remain
functional following an earthquake.
Promote regional retrofit classes or workshops for homeowners.
Provide technical assistance in seismically strengthening privately-owned soft-story
structures.
Require private owners to inform all existing tenants that they may need to be
prepared to work elsewhere following an earthquake even if the building has been
retrofitted, because it has probably been retrofitted to a life-safety standard, not to a
standard that will allow occupancy following major earthquakes.
Work to educate building owners, local government staff, engineers, and contractors
on privately-owned soft-story retrofit procedures and incentives using materials such
as those developed by ABAG and the City of San Jose (see
http://quake.abag.ca.gov/eqhouse.html.)
Expedite the funding and retrofit of seismically-deficient city- and county-owned
bridges and road structures by working with Caltrans and other appropriate
governmental agencies.
Conduct appropriate employee training and support continued education to ensure
enforcement of construction standards for private development.
Adopt the latest applicable standard for the design of voluntary or mandatory retrofit of
privately-owned seismically vulnerable buildings.
Comply with all applicable building and fire codes, as well as other regulations (such
as state requirements for fault, landslide, and liquefaction investigations in particular
mapped areas) when constructing or significantly remodeling infrastructure facilities.
59
DAM
X
Planning / Police
DR
X
Admin/ Public Works
EQ
X
Town Hall
EQ
X
Building Official
EQ
X
EQ
X
EQ
X
EQ
X
Building
EQ
X
Building
EQ
X
Building
EQ
X
EQ
X
EQ
X
EQ
X
Public Works
EQ
X
Building Official
EQ
X
Planning & Building Department
EQ
X
Public Works
Need inventory first
Ongoing
Town Ordinance #1059 adopting UBC,
Ordinance #1060; adopting CFC & UFC,
11/27/07
EQ-16
LAND-a-2
EQ-17
HSNG-f-1
Require preparation of site-specific geologic or geotechnical reports for development
and redevelopment proposals in areas subject to earthquake-induced landslides or
liquefaction as mandated by the State Seismic Hazard Mapping Act in selected
portions of the Bay Area where these maps have been completed, and condition
project approval on the incorporation of necessary mitigation measures related to site
remediation, structure and foundation design, and/or avoidance.
Continue to require that all new housing be constructed in compliance with
requirements of the most recently adopted version of the California Building Code.
EQ
X
Building
EQ-18
HSNG-f-2
Conduct appropriate employee training and support continued education to ensure
enforcement of building codes and construction standards, as well as identification of
typical design inadequacies of housing and recommended improvements.
EQ-19
ECON-b-2, HSNG-c-2
Adopt the latest applicable standard for the design of voluntary or mandatory softstory building retrofits for use in city/county building department regulations.
EQ
X
Building Official
Town Ordinance #: 1059, adopted 11/27/07
EQ
X
Project complete, 2004, see Report to
Seismic Safety Commision 8/13/2004
EQ
X
EQ
X
Town ordinance adopting UBC, Ordinance
#1059; adopting CFC & UFC, #1060,
11/27/07
EQ
X
EQ
X
EQ
X
Building
EQ
X
EQ
X
EQ
X
EQ
X
EQ-20
EQ-21
EQ-22
ECON-c-1, HSNG-d-1
ECON-c-2
ECON-h-1
EQ-23
HSNG-b-1
EQ-24
HSNG-b-2
EQ-25
HSNG-b-3
EQ-26
HSNG-b-4
EQ-27
HSNG-c-1, ECON-b-1
EQ-28
EQ-29
HSNG-d-2
HSNG-d-3
Continue to actively implement existing State law that requires cities and counties to
maintain lists of the addresses of unreinforced masonry buildings and inform private
property owners that they own this type of hazardous structure.
Accelerate retrofitting of privately-owned unreinforced masonry structures that have
not been retrofitted, for example, by (a) actively working with owners to obtain
structural analyses of their buildings, (b) helping owners obtain retrofit funding, (c)
adopting a mandatory (rather than voluntary) retrofit program, and/or (d) applying
penalties to owners who show inadequate efforts to upgrade these buildings.
Continue to require that all new privately-owned commercial and industrial buildings
be constructed in compliance with requirements of the most recently adopted version
of the California Building Code.
Utilize or recommend adoption of a retrofit standard that includes standard plan sets
and construction details for voluntary bolting of homes to their foundations and
bracing of outside walls of crawl spaces (“cripple” walls), such as Plan Set A
developed by a committee representing the East Bay-Peninsula-Monterey Chapters of
the International Code Council (ICC), California Building Officials (CALBO), the
Structural Engineers Association of Northern California (SEAONC), the Northern
California Chapter of the Earthquake Engineering Research Institute (EERI-NC), and
ABAG’s Earthquake Program.
Require engineered plan sets for seismic retrofitting of heavy two-story homes with
living areas over garages, as well as for split level homes (that is, homes not covered
by Plan Set A), until standard plan sets and construction details become available.
Require engineered plan sets for seismic retrofitting of homes on steep hillsides
(because these homes are not covered by Plan Set A).
Encourage building inspectors to take classes on a periodic basis (such as the FEMAdeveloped training classes offered by ABAG) on retrofitting of single-family homes,
including application of Plan Set A.
Require engineered plan sets for voluntary or mandatory soft-story seismic retrofits by
private owners until a standard plan set and construction details become available.
Accelerate retrofitting of privately-owned unreinforced masonry structures that have
not been retrofitted, for example, by (a) actively working with owners to obtain
structural analyses of their buildings, (b) helping owners obtain retrofit funding, (c)
adopting a mandatory versus voluntary, retrofit program, and/or (d) applying penalties
to owners who show inadequate efforts to upgrade these buildings.
Require private owners to inform all existing tenants (and prospective tenants prior to
signing a lease agreement) that they live in an unreinforced masonry building and the
standard to which it may have been retrofitted.
60
EQ
X
Public Works
Existing Program
EQ
X
EQ-30
HSNG-d-4
EQ-31
LAND-a-7
EQ-32
LAND-a-8
EQ-33
HSNG-g-18
EQ-34
ECON-d-2
EQ-35
EQ-36
FL-1
FL-2
GOVT-d-8
ECON-h-3
INFR-d-11
INFR-d-16
FL-3
INFR-d-17
FL-4
new
FL-5
FL-6
INFR-d-5
INFR-d-9
new
FL-7
new
FL-8
FL-9
GOVT-c-20
As required by State law, require private owners to inform all existing tenants that they
may need to be prepared to live elsewhere following an earthquake even if the
building has been retrofitted, because it has probably been retrofitted to a life-safety
standard, not to a standard that will allow occupancy following major earthquakes.
Support and/or facilitate efforts by the California Geological Survey to complete the
earthquake-induced landslide and liquefaction mapping for the Bay Area.
Require that local government reviews of geologic and engineering studies are
conducted by appropriately trained and credentialed personnel.
Create a mechanism to require the bracing of water heaters and flexible couplings on
gas appliances, and/or (as specified under “b. Single-family homes vulnerable to
earthquakes” above) the bolting of homes to their foundations and strengthening of
cripple walls to reduce fire ignitions due to earthquakes.
Adopt the latest applicable standard for the design of voluntary or mandatory retrofit of
privately-owned seismically vulnerable buildings.
Encourage staff to participate in efforts by professional organizations to mitigate
earthquake and landslide disaster losses, such as the efforts of the Northern
California Chapter of the Earthquake Engineering Research Institute, the East BayPeninsula Chapter of the International Code Council, the Structural Engineers
Association of Northern California, and the American Society of Grading Officials.
Work with private building owners to help them recognize that many strategies that
increase earthquake resistance also decrease damage in an explosion. In addition,
recognize that ventilation systems can be designed to contain airborne biological
agents.
Identify critical locally-owned bridges affected by flooding and either elevate them to
increase stream flow and maintain critical ingress and egress routes or modify the
channel to achieve equivalent objectives.
Work for better cooperation among the patchwork of agencies managing flood control
issues.
Improve monitoring of creek and watercourse flows to predict potential for flooding
downstream by working cooperatively with land owners and the cities and counties in
the watershed.
Continue Mapping of the creek to further evaluate, design, and implement additional
flood control projects
Pursue funding for the design and construction of storm drainage projects to protect
vulnerable properties, including property acquisitions, upstream storage such as
detention basins, and channel widening with the associated right-of-way acquisitions,
relocations, and environmental mitigations.
Develop an approach and locations for various watercourse bank protection
strategies, including for example, (1) an assessment of banks to inventory areas that
appear prone to failure, (2) bank stabilization, including installation of rip rap, or
whatever regulatory agencies allow (3) stream bed depth management using
dredging, and (4) removal of out-of-date coffer dams in rivers and tributary streams.
Working with stakeholders and the community, consider feasibility (including cost, funding,
environmental and downstream impacts) and options for purchasing and removal of Building
Bridge 2; the structure at 634-636 San Anselmo venue which is a major flow constriction at
flood levels.
environmental and downstream impacts) and options for removal of Morningside Avenue
Bridge and potential construction of upstream and downstream extended wingwalls.
Create and maintain an automated system of rain and flood gauges that is web
enabled and publicly-accessible. Work toward creating a coordinated regional
system.
61
EQ
X
EQ
X
EQ
X
EQ
X
Ross Valley Fire Department /
Building Department
EQ
X
EQ
LS
X
Public Works
EQ
X
Building Official
Ongoing
Existing Program
FL
X
Public Works/ Flood Zone 9 / Ross
Valley Watershed
Existing Program
FL
X
Public Works
Could be part of the CRS Program for
Public Information
FL
X
Public Works & Ross Valley Fire
Department
FL
X
Public Works/Flood Control District
FL
X
Public Works
FL
X
Public Works
FL
X
Public Works
FL
X
Public Works
FL
X
Ross Valley Fire Department / Town
Hall
FL-10
GOVT-d-3
FL-11
INFR-d-1
FL-12
New
FL-13
ECON-j-8, HSNG-k-13
new
FL-14
FL-15
HSNG-h-9
FL-16
New
FL-17
INFR-d-3
FL-18
INFR-d-2
FL-19
HSNG-h-3, Econ-f-3
FL-20
ECON-f-7
FL-21
HSNG-h-10
FL-22
FL-23
HSNG-h-8
new
FL-24
ECON-f-6
FL-25
ECON-f-1
FL-26
ECON-f-2
FL-27
LAND-c-5
FL-28
FL-29
ENVI-a-13
ENVI-a-6
Recognize that a multi-agency approach is needed to mitigate flooding by having
flood control districts, cities, counties, and utilities meet at least annually to jointly
discuss their capital improvement programs for most effectively reducing the threat of
flooding. Work toward making this process more formal to insure that flooding is
considered at existing joint-agency meetings.
Improve upon existing hydrologic analysis of runoff and drainage systems to predict
areas of insufficient capacity in the storm drain and natural creek system.
Integrate future flood control and water quality protection planning efforts in a
Stormwater Resource Plan
Develop the “Village Volunteers” campaign encouraging private businesses and
residents to keep storm drains in their neighborhood free of debris.
Continue to develop guidelines that limit the coverage of impervious surfaces, that require
the use of permeable surfaces, that implement other regulations to effectively channel and
minimize site runoff, and that allow water to percolate into the ground.
As funding opportunities become available, encourage home and apartment owners
to participate in elevation and floodproofing programs for areas within flood plain.
Develop a stormwater master plan
Conduct a watershed analysis at least once every ten years unless there is a major
development in the watershed or a major change in the Land Use Element of the
General Plan of the cities or counties within the watershed.
Develop procedures for performing a watershed analysis to examine the impact of
development on flooding potential downstream, including communities outside of the
jurisdiction of proposed projects.
Ensure that new private development pays its fair share of improvements to the storm
drainage system necessary to accommodate increased flows from the development,
or does not increase runoff by draining water to pervious areas or detention facilities.
Encourage private business owners to participate in building elevation programs
within flood hazard areas.
Encourage owners of properties in a floodplain to consider purchasing flood
insurance. For example, point out that most homeowners’ insurance policies do not
cover a property for flood damage.
Encourage home and apartment owners to get elevation certificates and participate in
home elevation programs within flood hazard areas.
Continue to provide link to web enabled and publicly-accessible system of flood gauges.
Apply floodplain management regulations for private development in the floodplain
and floodway.
To reduce flood risk, thereby reducing the cost of flood insurance to private property
owners, work to qualify for the highest-feasible rating under the Community Rating
System of the National Flood Insurance Program.
Balance the needs for private commercial and industrial development against the risk
from potential flood-related hazards.
Encourage new development near floodways to incorporate a buffer zone or setback
from that floodway to allow for changes in stormwater flows in the watershed over
time.
Enforce provisions under creek protection, stormwater management, and discharge
control ordinances designed to keep watercourses free of obstructions and to protect
drainage facilities to conform with the Regional Water Quality Control Board's Best
Management Practices.
Comply with applicable performance standards of any National Pollutant Discharge
Elimination System Phase II municipal stormwater permit that seeks to manage
increases in stormwater run-off flows from new development and redevelopment
construction projects.
62
FL
X
Town Hall
FL
X
Flood Zone 9 / Ross Valley
Watershed
FL
X
Public Works
FL
X
Public Works
FL
X
Public Works
FL
X
Building Department
FL
X
Public Works
FL
X
Watershed
FL
X
Watershed
FL
X
Planning/ Public Works / Bldg Ofc.
Existing Program
FL
X
Building Department
FL
X
Public Works / Bldg Official
FL
X
Public Works / Building
FL
X
Admin/Public Works
FL
X
Building Department
FL
X
Planning / Public Works
FL
X
Planning
Town is built out.
FL
X
Planning and Building
Existing Program
FL
X
Public Works
FL
X
Public Works
Existing program
FL-30
INFR-d-4
FL-31
INFR-d-6
FL-32
INFR-d-7
FL-33
LAND-c-6
FL-34
new
FL-35
new
FL-36
new
FL-37
new
new
FL-38
FL-39
new
new
Assist, support, and/or encourage the U.S. Army Corp of Engineers, various Flood
Control and Water Conservation Districts, and other responsible agencies to locate
and maintain funding for the development of flood control projects that have high costbenefit ratios (such as through the writing of letters of support and/or passing
resolutions in support of these efforts).
Continue to repair and make structural improvements to storm drains, pipelines,
and/or channels to enable them to perform to their design capacity in handling water
flows as part of regular maintenance activities.
Continue maintenance efforts to keep storm drains and creeks free of obstructions,
while retaining vegetation in the channel (as appropriate) to allow for the free flow of
water.
Per Community Rating System requirements, conduct annual outreach to San
Anselmo's Repetitive Loss Structure area (currently only one).
Continue to encourage new development near floodways to incorporate a setback from
watercourses to allow for changes in stormwater flows in the watershed over time.
Continue to have Town staff inspect creek areas after each storm.
Continue to investigate flood control ideas and projects throughout Town
Work with other Ross Valley jurisdictions to explore and adopt land use regulations to
minimize additional runoff, or reduce runoff, within the Ross Valley watershed.
environmental and downstream impacts) and options for econstructing and enlarging bridge
openings and culverts.
Continue to seek grants for Ross Valley Flood Control Program for projects within the Town
limits with the County
Create and update a photo record of the Town creeks to document condition and structures
linked with GPS.
FL
X
Public Works
FL
X
Public Works
FL
X
Public Works
FL
X
Public Works
FL
X
Planning / Public Works
FL
X
Public Works
FL
X
Public Works
FL
X
Public Works
FL
X
Public Works
FL
X
Public Works
FL
X
Public Works
FL
X
Public Works
FL
X
Public Works / Admin
Existing program
FL
X
Public Works / Building Official /
Planning
Existing Program- see Title 5 Ch 8 Muni
Code
FL
X
Planning
Existing Program
FL
X
Planning
Existing Program
FL
X
Planning
Existing Program
FL
X
Public Works / Police Department /
FL
X
Public Works and Building Official
Existing Program
FL-40
new
FL-41
FL-42
HSNG-h-4
FL-43
LAND-c-1
FL-44
LAND-c-2
FL-45
FL-46
FL-47
FL-48
LAND-c-3
LAND-c-4
ECON-f-4
INFR-d-8
environmental and downstream impacts) and options for flow bypass accomodation for
downtown constrictions
Provide and publicize sandbags to residents in anticipation of rainstorms, and deliver
those materials to vulnerable populations upon request.
Establish and enforce requirements for new development so that site-specific designs
and source-control techniques are used to manage peak stormwater runoff flows and
impacts from increased runoff volumes.
Incorporate FEMA guidelines and suggested activities into local government plans
and procedures for managing flood hazards.
Provide an institutional mechanism to ensure that development proposals adjacent to
floodways and in floodplains are referred to flood control districts and wastewater
agencies for review and comment (consistent with the NPDES program).
Establish and enforce regulations concerning new construction (and major
improvements to existing structures) within flood zones in order to be in compliance
with federal requirements and, thus, be a participant in the Community Rating System
of the National Flood Insurance Program.
Provide sandbags and plastic sheeting to private businesses in anticipation of
rainstorms, and deliver those materials to vulnerable populations upon request and
make location information know.
Enforce provisions under creek protection, stormwater management, and discharge
control ordinances designed to keep watercourses free of obstructions and to protect
drainage facilities to conform with the Regional Water Quality Control Board's Best
Management Practices.
63
FL-49
GOVT-d-4
FL-50
GOVT-d-5
FL-51
HAZ-1
HAZ-2
LS-1
new
FL
X
Town Hall
FL
X
Town Hall
FL
X
ENVI-a-9
HSNG-i-1, ECON-g-1
INFR-e-2
LS-3
LAND-d-5
LS-4
LAND-d-1
LS-5
LAND-d-2
LS-6
LAND-d-3
LS-7
LAND-d-4
LS-8
HSNG-i-2
LS-9
ENVI-a-7
LS-10
LAND-e-2
LS-11
LAND-e-1
WF-1
HSNG-g-11
ECON-e-2, Hsng-g-2
Building
Provide information on hazardous waste disposal and/or drop off locations.
HAZ
X
Hazardous & Solid Waste Joint
Power Authority
Enforce and/or comply with the hazardous materials requirements of the State of
California Certified Unified Program Agency (CUPA).
HAZ
X
Ross Valley Fire Department / Public
Works
ENVI-a-10
LS-2
WF-2
As new flood-control projects are completed, request that FEMA revise its floodinsurance rate maps and digital Geographic Information System (GIS) data to reflect
flood risks as accurately as possible.
Participate in FEMA’s National Flood Insurance Program & Community Rating System
Clarify and consider expanding cumulative substantial improvement requirements from 3 to 5
years
Increase efforts to reduce landslides and erosion in existing and future development
by improving appropriate code enforcement and use of applicable standards for
private property.
Establish requirements in zoning ordinances to address hillside development
constraints in areas of steep slopes that are likely to lead to excessive road
maintenance or where roads will be difficult to maintain during winter storms due to
landsliding.
Establish requirements in zoning ordinances to address hillside development
constraints, especially in areas of existing landslides.
Establish and enforce provisions (under subdivision ordinances or other means) that
geotechnical and soil-hazard investigations be conducted and filed to prevent grading
from creating unstable slopes, and that any necessary corrective actions be taken
prior to development approval.
Require that local government reviews of these investigations are conducted by
appropriately trained and credentialed personnel.
Establish and enforce grading, erosion, and sedimentation ordinances by requiring,
under certain conditions, grading permits and plans to control erosion and
sedimentation prior to development approval.
Establish and enforce provisions under the creek protection, storm water
management, and discharge control ordinances designed to control erosion and
sedimentation.
Increase efforts to reduce landslides and erosion in existing and future private
development through continuing education of design professionals on mitigation
strategies.
Enforce and/or comply with the grading, erosion, and sedimentation requirements by
prohibiting the discharge of concentrated stormwater flows by other than approved
methods that seek to minimize associated pollution.
Consider mitigation strategies for development proposed on steeper sites with greater
lanslide or wildfire hazard concerns.
For new development, require a buffer zone between residential properties and
landslide or wildfire hazard areas.
Work with residents to ensure adequate plans are developed for appropriate access
and evacuation in wildland-urban-interface areas exposed to high-to-extreme fire
threat.
Tie public education on defensible space and a comprehensive defensible space
ordinance to a field program of enforcement.
64
LS
X
Public Works
LS
x
Planning
LS
X
Planning
LS
X
LS
X
LS
X
LS
X
LS
X
LS
FL
LS
WF
LS
WF
WF
WF
X
Handled thru membership in Authority.
Zoning, Ordinance #917, February 26, 1991:
Town Ordinance #: 1010 adopted 10/28/99
Public Works
X
Public Works
X
Planning
X
Public Works / Ross Valley Fire
Department
X
No funds available for enforcement or
additional education.
WF-3
WF-4
WF-5
WF-6
WF-7
HSNG-g-9
HSNG-k-14
ECON-j-9
HSNG-g-10
GOVT-d-6
WF-8
ECON-e-1
WF-9
ECON-e-10
WF-10
ECON-e-12
WF-11
ECON-e-3
WF-12
ECON-j-6
WF-13
GOVT-c-19
WF-14
HSNG-g-12
WF-15
HSNG-g-13
WF-16
HSNG-g-14
WF-17
HSNG-g-16
Expand vegetation management programs in wildland-urbaninterface fire-threatened
communities or in areas exposed to high-to-extreme fire threat to more effectively
manage the fuel load through roadside collection and chipping, mechanical fuel
reduction equipment, selected harvesting, use of goats or other organic methods of
fuel reduction, and selected use of controlled burning.
Encourage the formation of a community- and neighborhood-based approach to
wildfire education and action through local Fire Safe Councils and the Fire Wise
Program. This effort is important because grant funds are currently available to offset
costs of specific council-supported projects.
Encourage the formation of a community- and neighborhood-based approach to
wildfire education and action through local Fire Safe Councils and the Fire Wise
Program. This effort is important because grant funds are currently available to offset
costs of specific council-supported projects.
Establish special funding mechanisms (such as Fire Hazard Abatement Districts or
regional bond funding) to fund reduction in fire risk of existing properties through
vegetation management that includes reduction of fuel loads, use of defensible space,
and fuel breaks.
Participate in multi-agency efforts to mitigate fire threat, such as the Hills Emergency
Forum (in the East Bay), various FireSafe Council programs, and city-utility task
forces. Such participation increases a jurisidiction's competitiveness in obtaining
grants.
Increase efforts to reduce hazards in existing private development in wildland-urbaninterface fire-threatened communities or in areas exposed to high-to-extreme fire
threat through improving engineering design and vegetation management for
mitigation, appropriate code enforcement, and public education on defensible space
mitigation strategies.
Conduct periodic fire-safety inspections of all privately-owned commercial and
industrial buildings.
Ensure that city/county-initiated fire-preventive vegetation-management techniques
and practices for creek sides and high-slope areas do not contribute to the landslide
and erosion hazard.
Require that new privately-owned business and office buildings in high fire hazard
areas be constructed of fire-resistant building materials and incorporate fire-resistant
design features (such as minimal use of eaves, internal corners, and open first floors)
to increase structural survivability and reduce ignitability.
Assist private businesses and residents in the development of defensible space
through the use of, for example, “tool libraries” for weed abatement tools, roadside
collection and/or chipping services (for brush, weeds, and tree branches) in wildlandurban-interface fire-threatened communities or in areas exposed to high-to-extreme
fire threat.
Increase local patrolling during periods of high fire weather.
Require fire sprinklers in new homes located more than 1.5 miles or a 5-minute
response time from a fire station or in an identified high hazard wildland-urbaninterface wildfire area.
Require fire sprinklers in all new or substantially remodeled multifamily housing,
regardless of distance from a fire station.
Require sprinklers in all mixed use development to protect residential uses from fires
started in non-residential areas.
Conduct periodic fire-safety inspections of all multi-family buildings, as required by
State law.
65
WF
X
WF
X
WF
X
WF
X
WF
X
Ross Valley Fire
WF
X
Town Ordinance #1061, adopted 11/27/07
WF
X
Ongoing Program
WF
X
Ongoing Program
WF
X
Building / Ross Valley Fire
Department
WF
X
WF
X
WF
X
WF
X
WF
X
WF
X
WF-18
HSNG-g-3
WF-19
HSNG-g-5
WF-20
INFR-c-1
WF-21
INFR-c-2
WF-22
INFR-c-3
WF-23
INFR-c-4
WF-24
INFR-c-6
WF-25
INFR-c-7
WF-26
INFR-c-8
WF-27
GOVT-c-17
WF-28
WF-29
WF-30
WF-31
ECON-e-4, HSNG-g-6
LAND-b-1
LAND-b-2
HSNG-g-7, ECON-e-5
Require that new homes in wildland-urban-interface fire-threatened communities or in
areas exposed to high-to-extreme fire threat be constructed of fire-resistant building
materials (including roofing and exterior walls) and incorporate fire-resistant design
features (such as minimal use of eaves, internal corners, and open first floors) to
increase structural survivability and reduce ignitability. Note - See Structural Fire
Prevention Field Guide for Mitigation of Wildfires at
http://osfm.fire.ca.gov/structural.html.
Consider fire safety, evacuation, and emergency vehicle access when reviewing
proposals to add secondary units or additional residential units in wildland-urbaninterface fire-threatened communities or in areas exposed to high-to-extreme fire
threat.
Ensure a reliable source of water for fire suppression (meeting acceptable standards
for minimum volume and duration of flow) for existing and new development.
Develop a coordinated approach between fire jurisdictions and water supply agencies
to identify needed improvements to the water distribution system, initially focusing on
areas of highest wildfire hazard (including wildfire threat areas and in wildland-urbaninterface areas).
Develop a defensible space vegetation program that includes the clearing or thinning
of (a) non-fire resistive vegetation within 30 feet of access and evacuation roads and
routes to critical facilities, or (b) all non-native species (such as eucalyptus and pine,
but not necessarily oaks) within 30 feet of access and evacuation roads and routes to
critical facilities.
For new development, ensure all dead-end segments of public roads in high hazard
areas have at least a “T” intersection turn-around sufficient for typical wildland fire
equipment.
Require that development in high fire hazard areas provide adequate access roads
(with width and vertical clearance that meet the minimum standards of the Fire Code
or relevant local ordinance), onsite fire protection systems, evacuation signage, and
fire breaks.
Ensure adequate fire equipment road or fire road access to developed and open
space areas.
Maintain fire roads and/or public right-of-way roads and keep them passable at all
times.
Monitor weather during times of high fire risk using, for example, weather stations tied
into police and fire dispatch centers.
WF
X
WF
X
WF
X
Existing Program
WF
X
Existing Program
WF
X
Existing Program
WF
X
Existing Program
WF
X
Existing Program
WF
X
Existing Program
WF
X
Existing Program
WF
X
Adopt and amend as needed updated versions of the California Building and Fire
Codes so that optimal fire-protection standards are used in construction and
renovation projects of private buildings.
WF
X
Ross Valley Fire Department / Public
Works
Town Ordinance #1059 adopting UBC,
Ordinance #1060; adopting CFC & UFC,
11/27/07
Review new development proposals to ensure that they incorporate required and
appropriate fire-mitigation measures, including adequate provisions for occupant
evacuation and access by emergency response personnel and equipment.
WF
X
Mount Tamalpais Mutual Threat Zone
Emergency Operations Plan project.
WF
X
Town ordinance adbopting UBC, Ordinance
#: 1061, adopted 11/27/07
Develop a clear legislative and regulatory framework at both the state and local levels
to manage the wildland-urban-interface consistent with Fire Wise and sustainable
community principles.
Create a mechanism to enforce provisions of the California Building and Fire Codes
and other local codes that require the installation of smoke detectors and fireextinguishing systems on existing residential buildings by making installation a
condition of (a) finalizing a permit for any work valued at over a fixed amount and/or
(b) on any building over 75 feet in height, and/or (b) as a condition for the transfer of
property.
66
WF
X
WF-32
HSNG-g-1
Increase efforts to reduce hazards in existing private development in wildland-urbaninterface fire-threatened communities or in areas exposed to high-to-extreme fire
threat through improving engineering design and vegetation management for
mitigation, appropriate code enforcement, and public education on defensible space
mitigation strategies.
Work to ensure a reliable source of water for fire suppression in rural-residential areas
through the cooperative efforts of water districts, fire districts, and residents.
WF-33
WF-34
WF-35
WF
X
WF
X
HSNG-g-8
ECON-j-4
HSNG-g-17
Inform San Anselmo's residents and private business owners of mitigation activities,
including elevation of appliances above expected flood levels, use of fire-resistant
roofing and defensible space in wildland-urban-interface fire-threatened communities
or in areas exposed to high-to-extreme fire threat, structural retrofitting techniques for
older buildings, and use of intelligent grading practices through workshops,
publications, and media announcements and events.
Ensure that city/county-initiated fire-preventive vegetation-management techniques
and practices for creek sides and high-slope areas do not contribute to the landslide
and erosion hazard. For example, vegetation in these sensitive areas could be
thinned, rather than removed, or replanted with less flammable materials. When
thinning, the non-native species should be removed first. Other options would be to
use structural mitigation, rather than vegetation management in the most sensitive
areas.
67
WF
FL
X
Ross Valley Fire
WF
LS
X
Replacement needed as soon as funding is
found:
Scenic
Avenue above #235
Ridge Road, including Parkside and Wood
Courts
Laurel Avenue above #440
Hillcrest Avenue from #12 to the end of
Olive Avenue.
Fernwood Drive
Future Plan Maintenance Process
Future Monitoring, Evaluating, and Updating the Plan
The Town is required to review and revise this hazard mitigation plan and resubmit it for approval within
5 years in order to remain eligible for mitigation project grant funding. To ensure the plan stays current
and incremental progress is made on implementing the mitigation strategies, the Town will make every
effort to update this Plan within five years by using a similar method to update the plan as was used to
develop this plan.
During this time, several related planning procedures are anticipated to elicit monitoring and review.
One of these is the FEMA Community Rating System. If San Anselmo gets credit for this plan under
Activity 512 Floodplain Management Planning it must evaluate its progress annually.
Incorporation into Existing Planning Mechanisms
The Town will incorporate the mitigation programs into existing programs. The mitigation objectives and
actions are designed to be carried out through the normal government activity. For example, any code
revisions or updates will be accomplished using standard procedures for code development. Structural
improvements to buildings and infrastructure will be incorporated into the Town capital improvement
projects and be subject to that process.
Continued Public Involvement
The Town will continue to involve the public in the plan maintenance by noticing meetings when the
plan will be reviewed and discussed through the Town email list and by postings at Town Hall and the
Town Post Office.
The adopted plan will be placed on the Town website. When the Town proceeds with an update of the
plan, a public hearing will be held to solicit public comment and input. All draft updates will be posted
on the Town website for public review prior to consideration by the Town Council.
Appendices
Resolution of Adoption
Paste Resolution Here
68
Public Meetings and Outreach Documentation
#1 Town Council Meeting July 28, 2015 Agenda Item 12: http://sananselmoca.granicus.com/GeneratedAgendaViewer.php?view_id=1&clip_id=83
Staff Report: http://sananselmo-ca.granicus.com/DocumentViewer.php?file=sananselmoca_5725f9b07291f91f59265f5c819264fc.pdf
Minutes: http://sananselmo-ca.granicus.com/DocumentViewer.php?file=sananselmo-ca_5009d2068bc7-4a4c-8b07-0310b4d70939.pdf
Flier for Public Meeting
Town Manager’s Newsletter- July 24, 2015
#2 Country Fair Day Booth- On September 27 San Anselmo had a booth at a popular event downtown
and asked the public to fill out this 5-question survey about the hazard plan update. 14 people
completed the survey and results are pasted below.
#3 Flood Committee Meeting November 19, 2015:
http://www.townofsananselmo.org/ArchiveCenter/ViewFile/Item/4827
#4 Quality of Life Commission Meeting January 18, 2016
http://www.townofsananselmo.org/ArchiveCenter/ViewFile/Item/4824
#5 Planning Commission February 1, 2016
http://sananselmo-ca.granicus.com/GeneratedAgendaViewer.php?view_id=1&clip_id=126
#6 Town Council February 9, 2016
http://sananselmo-ca.granicus.com/GeneratedAgendaViewer.php?view_id=1&clip_id=128
69
Country Fair Day Survey and Results
Question 1
70
Question 2
How do you get information concerning emergencies?
radio, internet, emergency alert systems
Text-message/phone alerts, local television, radio & internet.
neighbors and on-line community bulletin + emergency response emails
Nixel and news updates via text
radio, on line
San Anselmo Country Fair. Plus I know Sean Condry.
We walk down and look at the creek level under the La Apertife building where the creek is constricted
and two large culverts feed into it. Nothing else is reliable
Call from agency/police
Nixle
Text
Town of SA and Ross Valley Fire
You
Nixle
Question 3
71
Question 4
Question 5
“I am not in favor of using Memorial Park as a flood basin.”
“Additional community events during dry months regarding creek clean-up and the ways the
community can stay involved/participate.”
“Looking to do CERT truing but haven't found a good weekend to do it locally”
“educate people on what to plant for fire resistant gardens. I think the town is doing a great job
offering up CERT, offering flood info/ideas....it's hard to reach people who already have made up their
minds on issues”
“My son works for San Anselmo and I'm sure they have a plan in place”
72
“Make sure the siren goes off it didn't last year. Clean the creeks, abate where owners have built into
the creeks, remove the LaApertife building dredge the sand out of the bottom of the creek there are no
habitat issues when the creek is dry other than rats. Stop using our taxpayers money on grandiose
solutions that do nothing but line consultants pockets. Do not allow dams to let water out during a
flood,”
“Dam failure only affects Ross and downstream.”
“When are we going to get flood control!”
73
Plan Development Team Meeting Documentation
74
75
76
77
78
79
80
Stakeholders
Personnel from the following stakeholder groups were emailed twice during the planning process, first
on July 20, 2015 and again in December once the draft was completed.
81
Stakeholder Group
Ross Valley School District
Tamalpais School District
Marin Municipal Water District
City of San Rafael
Town of Fairfax
Town of Ross
Transportation Authority of Marin
Marin Sonoma Mosquito and
Vector Control
ABAG
Marin County Supervisor’s Office
Marin County Stormwater Pollution
Prevention Program
Marin Sheriff
Ross Valley Sanitary District
Marin County Parks and Open
Space
PG&E
Marin County Flood Control District
Marin General Services Authority
Name, Title
Marci Trahan, Assistant Superintendent
Liz Seabury, Drake High School Principal
David Peery, Safety and Risk Manager
Krishna Kumar, General Manager
Paul Jensen, Community Development Director
Raffi Boloyan, Planning Manager
Garrett Toy, Town Manager
Leann Taagepera, Contract Planner
Scott McDonald, Senior Transportation Planner
David Chan, Manager of Programming and
Legislation
Phil Smith, District Manager
Dana Brechwald, Earthquake & Hazards Specialist
Danielle Mieler, Resilience Program Coordinator
Nancy Vernon, Board Aide
Lynne Scarpa, Outreach Program Coordinator
Terri Fashing, Program Manager
Tom Jordan, Emergency Services Coordinator
Randell Ishii, District Engineer
Katherine Hayden, Assistant Engineer
James Raives, Senior Planner
James Wickham, Senior Public Safety Specialist
Scott Lyle, Marin County Flood Control District
Program Manager
Hannah Lee, Associate Civil Engineer
Paul Berlant, Executive Director
82
Works Cited
ABAG Association of Bay Area Governments Resilience Program．s.l.，
http://resilience.abag.ca.gov/projects/2016-mitigation-adaptation-plans/，2015．
IPCC 5th Assessment Report WG1 Chapter 13: Sea Level Rise．s.l.，
https://www.ipcc.ch/pdf/assessment-report/ar5/wg1/WG1AR5_Chapter13_FINAL.pdf，2015．
Larkspur City of Larkspur Updated All-Hazard Mitigation Plan．s.l.，
http://hazardmitigation.calema.ca.gov/docs/lhmp/Larkspur_City_ofl.pdf，2014．
MCDPW Marin County Public Works Department Hazardous Materials Area Plan．s.l.，
http://www.marincounty.org/~/media/files/departments/fr/080722-16-pw-attach-rep-hazmatplan.pdf
，2008．
—．Marin County Public Works Flood Control District reports．
[Online]http://www.marinwatersheds.org/documents_and_reports/documents-reports.html．
MCOES Marin County Local Hazard Mitigation Plan, 2012 Update．
MMWD Marin Municipal Water District Urban Water Management Plan Water Demand Analysis and
Water Conservation Measures Update．s.l.，http://www.marinwater.org/documentcenter/view/3497
，2015．
Ross Town of Ross Local Hazard Mitigation Plan．s.l.，
http://www.townofross.org/sites/default/files/fileattachments/police/page/295/ross-hazardmitigation-plan.pdf，2012．
RVSD Ross Valley Sanitary District Sewer System Management Plan．s.l.，
http://rvsd.org/contractors/planning-and-capital-improvements，2013．
TSA San Anselmo Climate Action Plan．s.l.，http://www.townofsananselmo.org/index.aspx?NID=636，
2011．
—． San Anselmo Flood Mitigation Plan．s.l.，
http://hazardmitigation.calema.ca.gov/docs/fmp/San_Anselmo_Flood_Mitigation_Plan08.pdf，2008．
—． San Anselmo General Plan．s.l.，http://www.townofsananselmo.org/index.aspx?NID=216，1989
．
—． San Anselmo Local Hazard Mitigation Plan Annex to Taming Natural Disasters ．s.l.，
http://resilience.abag.ca.gov/wp-content/documents/2010LHMP/SanAnselmo-Annex-2011.pdf，2011
．
83
USGS Flood of January 1982 in the San Francisco Bay Area, California．1989．
Weather Channel Accessed December 2015．s.l.，
http://www.weather.com/weather/monthly/l/94960?x=0&y=0．
WickhamJamesPublic Safety Specialist Pacific Gas & Electric Co.|．Personal Communication．12
January 2016．
84

HERE - Town of San Anselmo

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