Sacramento County Annex M Twin Rivers Unified School District

Transcription

Annex M: TWIN RIVERS
SCHOOL DISTRICT
M.1 Introduction
This Annex details the hazard mitigation planning elements specific to the Twin Rivers School
District, a participating jurisdiction to the Sacramento County LHMP Update. The District was
formed in 2007 and, as such, did not participate in the 2005 plan. The District is a new
participating jurisdiction for the Sacramento County LHMP update. This annex is not intended
to be a standalone document, but appends to and supplements the information contained in the
base plan document. As such, all sections of the base plan apply to the District. In addition, in
order to meet the DMA requirements for plan development, the District followed their own plan
development process as described further below. This Annex provides additional information
specific to the Twin Rivers School District, with a focus on providing additional details on the
risk assessment and mitigation strategy for this community.
M.2 Planning Process
As described above, the Twin Rivers School District followed the planning process detailed in
Section 3.0 of the base plan as modified below. In addition to coordinating with the key
individuals from the Sacramento County Hazard Mitigation Planning Committee (HMPC), the
District formulated their own internal planning team to support the broader planning process
requirements. Internal planning participants included staff from the following District
departments:
Alan Colombo, Facilities Services Department
Greg Rash, Business Services Department
Frank Diaz, Director of Operations
Cookie Brakefill, Secretary to the Director of Facilities
Pete Ramirez, Director of Maintenance & Operations
Michael Braff, Sr. Manager Facilities Construction
Victoria Garcia, Facilities Accounting Supervisor
Tim Bonds, Facilities Services Department, Energy Management
Beth Brose, Harrison Management Solutions, Consultant
As a result of Twin River’s decision to join the Sacramento LHMP Update as a participating
jurisdiction towards the end of the planning process for the base plan, a modified planning
process was conducted specific to the District. Specifically, the District retained AMEC
Environment & Infrastructure (AMEC) to assist in the development of a TRUSD Annex. In
addition to their participation in the more formalized planning process facilitated by AMEC (as
Sacramento County (Twin Rivers School District)
Local Hazard Mitigation Plan Update
October 2012
Public Review Draft
M.1
further detailed below), District participants assisted in providing data, drafting portions of the
plan, and providing input on mitigation action items.
After initial discussion and preliminary data collection, a kickoff meeting conference call held on
December 15, 2011 was facilitated by AMEC with District representatives. The call included a
discussion of the LHMP planning process, data requirements for annex development and overall
annex requirements, including allocation of effort between AMEC and the District. Similar to
the planning process for the base plan, a Data Collection Workbook was completed by the
District to support Annex development and to better determine the risk and vulnerability of the
District to identified hazards. At the completion of the draft risk assessment for the District, a
second planning meeting was held to review results and to obtain additional District input.
Once an initial draft of the annex was developed and reviewed by the District, a third conference
call was held between AMEC and the District to discuss Plan Goals and Mitigation Strategies.
Mitigation strategy information provided in Appendix C of the base plan was communicated to
all parties and discussed during this call in the identification and prioritization of mitigation
actions for the District. The end result was agreement by the District to adopt the goals and
objectives of the base plan, as well as the identification of mitigation actions specific to the
District. Information developed specific to the mitigation strategy meeting is shown in Appendix
A to this Annex.
In addition, numerous coordination calls occurred between the District and AMEC to facilitate
annex development. The three formal conference calls, along with attendees, are shown in Table
M.1.
Table M.1.
Planning Process Meetings
Meeting
Kickoff Meeting
Date
Location
Attendees
12/15/2011
Teleconference Alan Columbo, Facilities Services Department
Jeanine Foster (AMEC)
Risk Assessment Meeting
4/5/2012
Teleconference Alan Columbo, Facilities Services Department
Mitigation Strategy Meeting
10/5/2012
Teleconference Mr. Greg Rash, Business Services Department
Mr. Michael Braff, Facilities Services Department
Mr. Alan Colombo, Facilities Services Department
Ms. Victoria Garcia, Facilities Services Department
Mr. Frank Diaz, Facilities Services
Department/Operations
Mr. Tim Bonds, Maintenance & Operations
Mr. Pete Ramirez, Maintenance & Operations
Ms. Beth Brose, Harrison Management Solutions for
Facilities Services Dept.
October 2012
Public Review Draft
M.2
Meeting
Public Meeting/Adoption
Meeting
Date
Location
11/15/2012
Board Room
5115 Dudley
Blvd,
McClellan, CA
Attendees
INSERT
Public Outreach
Once a final public outreach draft of the District Annex was completed, the District placed a
copy of the draft plan in the following locations to facilitate public review and comment on the
draft plan prior to finalization:
At the District Office in the Risk Management Department, located at 5115 Dudley Blvd,
McClellan, CA 95652;
In the Facility Services Department, located at 3222 Winona Way, No. Highlands, CA
95652; and
On the District website at twinriversusd.org (in the Facilities Services section)
After the plan was made available to the public, a formal public meeting was held during a
District Board of Trustees meeting to obtain public comments. X members of the public
attended, but no official comments were submitted.
Board Adoption
Also during this board meeting, it was determined by the board to formally adopt the plan prior
to submittal to Cal EMA and FEMA for review and final approval. However, the board is
prepared to readopt the plan if necessary base on any requested changes to the plan document
from Cal EMA and FEMA. A copy of a sample resolution is included in Appendix A.
Plan Implementation
The District will follow the plan maintenance and implementation procedures outlined in the
base plan. In addition, the District website will be used to communicate to the District and the
public on plan implementation and status until the next plan update.
M.3 District Profile
The community profile for the Twin Rivers School District is detailed in the following sections.
Figure M.1 displays a map and the location of Twin Rivers School District facilities within
Sacramento County.
October 2012
Public Review Draft
M.3
Figure M.1.
Twin Rivers School District Properties
October 2012
Public Review Draft
M.4
M.3.1 History
The small community school districts that evolved in the North Sacramento communities were
long a topic of discussion and debate. While most of the country’s students receive a fully
articulated and unified educational experience in preschool through 12th grade systems, students
in the North Sacramento area attended a variety of schools and districts depending on their
neighborhood and grade level. Many educational leaders saw the need for more consistency,
financial stability, and realignment of resources, but others worried that a larger system would
take away a family-friendly culture the smaller districts enjoyed. In the late 1990s, a small group
of community members and educators embarked upon a vision to unify the north area districts.
After more than 60 years and seven attempts, voters finally approved this new vision for
unification involving four of the six area school districts: Grant Joint Union High School
District, North Sacramento School District, Rio Linda Union School District, and Del Paso
Heights School District. On November 7, 2007, the voters overwhelmingly adopted the
unification proposal.
The voters chose a new board of trustees to lead this new unified district. They selected one
trustee from each of seven geographic regions in the boundary area. The board requested that
the community name our new district. After a month-long promotional contest and more than
500 suggestions, Twin Rivers Unified School District became the official name. On July 1,
2008, with much excitement and positive enthusiasm, the Twin Rivers Unified School District
officially became the newest unified district in California.
The District is comprised of 760 acres utilizing over 3.4 million square feet of space, located in
Sacramento County, in the northern region of the greater Sacramento area. Bordering Natomas
district to the south and west, Sacramento City district to the south and San Juan district to the
east, the District holds a total of 32,000 students in over 60 different schools. The District also
owns a variety of other properties and buildings to house a variety of support facilities that
include administrative offices, maintenance buildings, and park lands.
M.4 Hazard Identification and Summary
This section details how the risk varies across the Sacramento County planning area and specific
to the District. The District’s planning team identified the hazards that affect the District and
summarized their frequency of occurrence; spatial extent, potential magnitude, and significance
specific to the District (see Table M.2). In the context of the plan’s planning area, there are no
hazards that are unique to the District.
Information on hazards, past occurrences and the likelihood of future occurrences is detailed in
Section 4, Risk Assessment, of the base plan. Additional information for high and medium
significant hazards for the District is included in the Vulnerability Assessment section of this
Annex.
October 2012
Public Review Draft
M.5
Table M.2.
Twin Rivers School District Hazard Summary
Frequency of
Occurrence
Hazard
Spatial Extent
Potential
Magnitude
Significance
Agricultural Hazards:
Insects/Pests
Limited
Occasional
Limited
Low
Bird Strike
Limited
Likely
Limited
Low
Dam Failure
Significant
Unlikely
Catastrophic
Medium
Drought
Extensive
Likely
Limited
Low
Earthquake
Limited
Occasional
Critical
Medium
Flood: 100/200/500-year
Limited
Occasional
Limited
High
Flood: Localized/Stormwater
Significant
Occasional
Critical
Medium
Landslide
Limited
Highly Likely
Limited
Low
Levee Failure
Limited
Unlikely
Negligible
High
River/Stream/Creek Bank
Erosion
Significant
Occasional
Catastrophic
Medium
Severe Weather: Extreme Heat
Limited
Unlikely
Negligible
Medium
Severe Weather: Fog
Extensive
Highly Likely
Limited
Medium
Severe Weather: Freeze
Extensive
Highly Likely
Limited
Low
Severe Weather: Heavy Rain
and Storms
Extensive
Highly Likely
Limited
Severe Weather: Tornadoes
Extensive
Highly Likely
Critical
Medium
Subsidence
Limited
Likely
Limited
Low
Volcano
Significant
Highly Likely
Limited
Low
Wildfire
Limited
Unlikely
Limited
Medium
Guidelines for Hazard Rankings:
Frequency of Occurrence:
Highly Likely-Near 100 percent probability in next year
Likely-Between 10 and 100 percent probability in next year or at least
one chance in ten years
Occasional-Between 1 and 10 percent probability in next year or at
least one chance in next 100 years
Unlikely-Less than 1 percent probability in next 100 years
Medium
Potential Magnitude:
Catastrophic-More than 50 percent of area
affected
Critical-25 to 50 percent
Limited-10 to 25 percent
Negligible-Less than 10 percent
Significance (subjective):
Low, Medium, High
Spatial Extent:
Limited-Less than 10 percent of planning area
Significant-10-50 percent of planning area
Extensive-50-100 percent of planning area
Source: AMEC Data Collection Guide
October 2012
Public Review Draft
M.6
M.5 Vulnerability Assessment
The intent of this section is to assess the District’s vulnerability separate from that of the
planning area as a whole, which has already been assessed in Section 4.3 Vulnerability
Assessment of the base plan. This vulnerability assessment provides an inventory of the
population, property, and other assets located within the District and further analyzes those assets
at risk to identified hazards ranked of medium or high significance (as listed in Table M.2) to the
community. For more information about how hazards affect the County as a whole, see Chapter
4 Risk Assessment in the main plan.
M.5.1 Total Assets at Risk
This section identifies the District’s total assets at risk, including building values and populations
at risk. This section also includes a discussion of growth and development trends within the
District boundaries.
Values at Risk
Significant assets directly within the Twin Rivers School District include a range of properties
and infrastructure owned or operated by the District. An inventory of key District assets is
provided in Table M.3. Total value of these buildings, based on data provided by the District
exceeds $715 million. All of the facilities owned by the District are considered critical facilities.
Table M.3.
Key Assets in the Twin Rivers School District
Parcel
Building Name
Physical Address
Occupancy
218-0261-001-0000
Aero Haven
Elementary
5450 Georgia Dr., No. Highlands,
190
$6,133,070
219-0032-002-0000
Allison, Warren A.
Elementary
4315 Don Julio Blvd., No.
Highlands,
275
$6,432,540
219-0032-003-0000
Allison, Warren A.
Elementary
Highlands
275
N/A
277-0114-001-0000
Babcock Park
2400 Cormorant Way,
Sacramento
0
N/A
277-0055-001-0000
Babcock, D W
Elementary
2400 Cormorant Way,
Sacramento
400
238-0050-012-0000
Bell Avenue Property
1690 Bell Avenue, Sacramento,
0
252-0171-001-0000
Castori, Michael J.
Elementary
1801 South Ave., Sacramento,
750
$7,657,585
219-0020-034-0000
Creative Conn. Arts
Academy Charter (K8)
7201 Arutas Dr., No. Highlands
540
$5,765,220
219-0035-001-0000
Creative Conn. Arts
Academy Charter(912)
6444 Walerga Rd, No. Highlands
105
$12,905,740
October 2012
Public Review Draft
Building Value
$6,494,106
N/A
M.7
Parcel
Building Name
Physical Address
Occupancy
Building Value
250-0101-010-0000
Del Paso Heights
Elementary
590 Morey Ave., Sacramento,
290
$7,596,650
250-0101-011-0000
Del Paso Heights
Elementary
290
N/A
215-0320-005-0000
District Office
5115 Dudley Blvd, McClellan
330
$67,947,365
250-0084-001-0000
DPH Park
590 Morey Ave., Sacramento
215-0130-001-0000
Dry Creek
Elementary
1230 G St., Rio Linda
115
$6,852,660
215-0130-003-0000
Dry Creek
Elementary
115
N/A
215-0130-034-0000
Dry Creek
Elementary
115
N/A
215-0130-004-0000
Dry Creek
Elementary
115
N/A
0
$0
201-0320-018-0000
East Natomas
5921 E. Levee Rd
Educational Complex
0
N/A
201-0320-019-0000
East Natomas
5922 E. Levee Rd
Educational Complex
0
N/A
201-0320-020-0000
East Natomas
5923 E. Levee Rd
Educational Complex
(Not Mapped)
0
N/A
201-0320-024-0000
East Natomas
5924 E. Levee Rd
Educational Complex
0
N/A
201-0540-071-0000
East Natomas
5925 E. Levee Rd
Educational Complex
0
N/A
201-0540-072-0000
East Natomas
5926 E. Levee Rd
Educational Complex
0
$67,947,365
250-0192-005-0000
Fairbanks Elementary 227 Fairbanks Ave., Sacramento
435
$6,968,540
220-0450-012-0000
Foothill High
5000 McCloud Dr., Sacramento
1,270
$32,080,190
222-0121-019-0000
Foothill Oaks
Elementary
5520 Lancelot Dr., Sacramento
580
$7,980,830
220-0450-012-0000
Foothill Ranch Jr.
High
5001 Diablo Dr., Sacramento
765
$14,581,580
215-0241-012-0000
Frito-Lay Land
Purchase
220-0420-016-0000
Frontier Elementary
217-0110-006-0000
1710 Ascot Ave., Rio Linda
0
N/A
6691 Silverthorne Cir.,
Sacramento
545
$7,039,520
Future Charter
School (7-12)
3701 Stephen Dr., No. Highlands
565
N/A
250-0390-034-0000
Garden Valley
Elementary
3601 Larchwood Dr.,
Sacramento
410
$3,601,260
251-0111-001-0000
Grand Ave. Admin.
Offices
1333 Grand Ave., Sacramento
55
$7,604,370
251-0112-002-0000
Grant High
1400 Grand Ave., Sacramento
1,035
$45,591,240
251-0112-002-0000
Grant West
1221 South Ave., Sacramento
1,035
$15,369,260
265-0140-006-0000
Hagginwood
Elementary
1418 Palo Verde Ave.,
Sacramento
455
$6,989,112
October 2012
Public Review Draft
M.8
Parcel
Building Name
Physical Address
Hayer Park (RLPA)
Park
266-0312-006-0000
Higher Learning
Academy
2625 Plover St., Sacramento
115
$800,000
266-0321-004-0000
Higher Learning
Academy
2625 Plover St., Sacramento
115
N/A
219-0035-001-0000
Highlands Academy
of Art & Design
6601 Guthrie Way, No. Highlands
925
$30,536,620
219-0036-002-0000
Hillsdale Elementary
6469 Guthrie Way, No. Highlands
460
$7,069,330
215-0310-031-0000
Information
Technology Offices
5201 Arnold Way, McClellan
50
N/A
263-0010-032-0000
Johnson, Harmon
Elementary 2.0
577 Las Palmas Ave.,
Sacramento
635
$12,644,380
263-0110-005-0000
Johnson, Harmon
Elementary, Old
2591 Edgewater Rd.,
Sacramento
0
218-0010-012-0000
Joyce, Frederick C.
Elementary
6050 Watt Ave., No. Highlands
605
263-0030-009-0000
King, Jr,. Martin
Luther JHS Off-Site
(Old Maintenance
Site)
547 Arcade Blvd, Sacramento
0
N/A
263-0030-010-0000
King, Jr,. Martin
Luther JHS Off-Site
(Old Maintenance
Site)
549 Arcade Blvd
0
N/A
263-0030-011-0000
King, Jr,. Martin
Luther JHS Off-Site
(Old Maintenance
Site)
555 Arcade Blvd
0
N/A
263-0030-012-0000
King, Jr,. Martin
Luther JHS Off-Site
(Old Maintenance
Site)
557 Arcade Blvd
0
N/A
263-0030-013-0000
King, Jr,. Martin
Luther JHS Off-Site
(Old Maintenance
Site)
559 Arcade Blvd
0
N/A
263-0010-033-0000
King, Jr,. Martin
Luther Technology
Academy
3051 Fairfield St., Sacramento
365
$19,448,020
263-0042-005-0000
King, Jr,. Martin
Luther Technology
Academy
3051 Fairfield St., Sacramento
365
N/A
217-0220-011-0000
Kohler Elementary
4004 Bruce Way, No. Highlands
510
$6,663,290
217-0150-034-0000
Larchmont
Elementary
6560 Melrose Dr., No. Highlands
170
$6,179,100
228-0131-008-0000
Madison Elementary
5241 Harrison St., No. Highlands
680
$7,832,480
265-0311-002-0000
Maint./Food/Transp. - 2628 Taft St., Sacramento
Taft Street
15
$2,212,790
Public Review Draft
0
Building Value
214-0071-021-0000
October 2012
1101 "G" St., Rio Linda
Occupancy
N/A
N/A
$7,371,345
M.9
Parcel
206-0251-004-0000
Building Name
Physical Address
Maint./Oper./Transp. - 6619 6th Ave., Rio Linda
Rio Linda
Occupancy
Building Value
75
$1,563,560
Bridgeford & Chuckwagon
0
N/A
225-0170-029-0000
Meister Site
250-0026-008-0000
Morey Avenue Pre K
-K
30
$3,230,960
250-0026-009-0000
Morey Avenue Pre K
-K
30
N/A
250-0026-014-0000
Morey Avenue Pre K
-K
30
N/A
250-0341-002-0000
Morey Avenue Pre K
-K
30
N/A
215-0300-040-0000
Murchison Center
5703 Skvarla, Bldg. 1407,
McClellan
0
$4,037,430
263-0010-011-0000
Noralto Elementary
750
$8,155,470
237-0221-014-0000
North Avenue
Elementary
0
$5,694,600
265-0311-002-0000
Northwood
Elementary
2630 Taft St., Sacramento
535
$8,629,790
237-0022-015-0000
Norwood Jr. High
4601 Norwood Ave., Sacramento
405
$12,819,160
237-0022-014-0000
Norwood Jr. High
4601 Norwood Ave., Sacramento
405
N/A
Sacramento
1281 North Ave., Sacramento
207-0221-016-0000
Nutrition - I Street Rio 2041 I St, Rio Linda
Linda
240-0020-001-0000
Oakdale Elementary
3708 Myrtle Ave., No. Highlands
555
$7,243,120
207-0090-008-0000
Orchard Elementary
1040 Q St., Rio Linda
255
$10,369,190
207-0090-009-0000
Orchard Elementary
1040 Q St., Rio Linda
255
$0
217-0110-006-0000
Pacific Career &
Technology High
3800 Bolivar Ave., No. Highlands
150
$14,282,860
220-0111-001-0000
Pioneer Elementary
5816 Pioneer Way, Sacramento
695
$6,730,628
201-0540-050-0000
Regency Park
Elementary
5901 Bridgecross Dr. Way,
Sacramento
915
$9,635,770
219-0037-001-0000
Richmond, Miles P.
School
4330 Keema Ave., North
Highlands
60
$2,729,260
219-0042-030-0000
Ridgepoint
Elementary
4680 Monument Dr., Sacramento
745
$7,132,630
0
$7,586,880
$33,047,090
206-0231-001-0000
Rio Linda Elementary 631 L St., Rio Linda
0
$585,300
214-0072-006-0000
Rio Linda High
6309 Dry Creek Rd., Rio Linda
1,930
207-0152-004-0000
Rio Linda High
Stadium
6411 Dry Creek Rd., Rio Linda
0
214-0072-006-0000
Rio Linda Prep
Academy
1101 "G" St., Rio Linda
500
$10,315,100
262-0140-012-0000
Rio Tierra Jr. High
201 Northstead Dr., Sacramento
625
$12,245,530
275-0102-017-0000
Robinson, Fred K.
Admin. Offices
670 Dixieanne Ave., Sacramento
0
$7,281,330
219-0020-001-0000
Sierra View
Elementary
505
$6,133,590
October 2012
3638 Bainbridge Dr., No.
Highland
Public Review Draft
N/A
M.10
Parcel
Building Name
Physical Address
Occupancy
Building Value
262-0202-025-0000
Smythe, Alethea B.
Charter (7-8)
700 Dos Rios St., Sacramento
455
$5,972,380
001-0082-001-0000
Smythe, Alethea B.
Charter (K-6)
2781 Northgate Blvd.
Sacramento
665
$6,249,880
262-0140-003-0000
Strauch, Hazel
Elementary
3141 Northstead Dr.,
Sacramento
600
$6,281,010
201-0300-102-0000
Terrace Park
Undeveloped/Greg Thatch Circle
0
N/A
201-0300-103-0000
Terrace Park
0
N/A
251-0112-002-0000
Transportation Grand Ave.
1400B Grand Ave., Sacramento
60
$976,300
200-0153-001-0000
Village Elementary
6845 Larchmont Dr., No.
Highlands
645
$6,210,970
207-0221-016-0000
Vineland (Pre) /
Pathways (Alt.)
6450 20th St., Rio Linda
55
$7,916,235
185
$5,584,650
238-0191-001-0000
Vista Nueva Career & 2035 North Ave., Sacramento
Tech High/NOVA
214-0181-002-0000
West 4th Ave / E
Street
Undeveloped
0
N/A
206-0090-014-0000
West 4th Ave / Q
Street
Undeveloped
0
N/A
214-0022-002-0000
Westside Elementary 6537 West 2nd St., Rio Linda
585
$5,961,960
240-0550-039-0000
Winona Admin Center 3222 Winona Way, No.
Highlands
105
$33,840,000
275-0240-006-0000
Woodlake Elementary 700 Southgate Rd., Sacramento
480
$5,606,435
515
$7,486,120
220-0341-012-0000
Woodridge
Elementary
5761 Brett Dr., Sacramento
Total
29,895
$715,830,746
Source: Twin Rivers School District
Growth and Development Trends
During the process of unification, a master plan was prepared outlining future growth potential.
The area of growth will be minimal and will be contained within the western section of the
District.
While there were no new schools planned for the immediate future, two new properties were
purchased, know as Terrace Park and Greenbriar. At some point in the next five years, pending
financing, the district intends to begin the planning process for these sites. During that planning,
the district will implement the new district standards that will clearly define the new building
techniques and guidelines for building in potentially natural hazard zones, such as flooding,
earthquake and tornado.
In addition, there are tentative plans to reconfigure sites and to adjust grade levels. During the
planning for this work, the district should be able to provide standards to any design professional
to implement safer and more substantial buildings.
October 2012
Public Review Draft
M.11
M.5.2 Priority Hazards: Vulnerability Assessment
This section provides the vulnerability assessment, including any quantifiable loss estimates, for
those hazards identified above in Table M.2 as high or medium significance hazards. Impacts of
past events and vulnerability of the District to specific hazards are further discussed below (see
Section 4.1 Hazard Identification for more detailed information about these hazards and their
impacts on the Sacramento County planning area). Methodologies for calculating loss estimates
are the same as those described in Section 4.3 of the base plan, as modified as described in this
annex. In general, the most vulnerable structures are those located within the floodplain or
within levee and dam inundation areas, unreinforced masonry buildings, and buildings built prior
to the introduction of modern building codes.
Dam Failure
Dam failures can result from a number of natural or man made causes such as earthquakes,
erosion of the face or foundation, improper siding, rapidly rising flood waters, structural/design
flaws, and deliberate human actions. Folsom Dam is the major dam which affects the District
and the student populations in the inundation areas. Of prime concern are the failures of the
Folsom Dam, which is owned by the US Bureau of Reclamation. The flood waters from the dam
would affect the District.
Other dams could affect the District, but inundation zones for the following dams were not
mapped for this plan. The Sacramento Municipal Utility District (SMUD) inundation map
indicates that a failure of the Rancho Seco Dam would flow to the Laguna Creek Basin and stop
approximately at Stockton Boulevard. Failure of Shasta Dam would affect populations south
along the Sacramento River basin to about Knights Landing where the water would lose
momentum. An Oroville Dam failure would impact populations southwest along the Feather
River basin to about the Yolo Bypass.
Warning ability is generally determined by the frequency of inspections for structural integrity,
the flood wave arrival time (the time it takes for the flood wave to reach its maximum distance of
inundation), or the ability to notify persons downstream and their ability to evacuate. The
existence and frequency of updating and exercising an evacuation plan that is site-specific assists
in warning and evacuation functions. A failure of the Folsom Dam would leave little time for
evacuation of District properties downstream.
During the flood season, Folsom Dam and Reservoir is operated according to a criterion that has
been promulgated by the Secretary of the Army. There are two criteria. The first is a design
release of 115,000 cfs from the reservoir during a flood event. The second is 400,000 acre-feet
of storage dedicated to flood control. In the early 1950’s when these criteria were developed,
this dam was expected to provide the Sacramento area with a 250-year level flood protection.
Due to more and better data, the Corps of Engineers now determine that the dam will only
provide for a 63-year level protection.
October 2012
Public Review Draft
M.12
Flood control capacity could be increased if releases of greater than 115,000 cfs were allowed,
but the levees of the American River are not capable of handling the great flow for any extended
time period.
A dam failure will cause loss of life, damage to property, and other ensuing hazards, as well as
the displacement of persons residing in the inundation path. Damage to electric generating
facilities and transmission lines could also impact life support systems in communities outside
the immediate hazard areas.
A catastrophic dam failure, depending on size of dam and population downstream, could exceed
the response capability of local communities. Damage control and disaster relief support would
be required from other local governmental and private organizations, and from the state and
federal governments. Figure 4.65 in Section 4.3.4 in the base plan shows the areas of
Sacramento County at risk to a dam failure of the Folsom Dam.
Values at Risk
Sacramento County provided inundation as a GIS layer for the Folsom Dam system, as part of
the following breaks:
Folsom Right Wing
Folsom Mormon
Folsom Dike 4
Folsom Dike 5
Folsom Dike 6
Folsom Dike 7
Folsom Dike 8
Folsom Dam
The Bureau of Reclamation performed this study in an attempt to determine the magnitude of
flooding that would result from various breach scenarios of structures located around the
reservoir. The structures are Folsom Dam itself, its right wing dam, dikes 4, 5, 6, 7, 8, and
Mormon Island. The results of hydrodynamic simulations are used to generate potential
inundation maps that can aid in the development of emergency actions plans.
The District’s school locations were used as the basis for this analysis. The District provided
occupancy and building values for each school. GIS was used to create a centroid, or a point
representing the center of the School’s parcel polygon. The Folsom Inundation data was then
overlaid on the parcel centroids to determine how much value is at risk to a worst case scenario
failure. Based on Hazus guidance, contents value is estimated at 100 percent of the improved
value for schools and libraries. Structure and contents values are summed, and then a loss
estimate is calculated. Losses are related to a number of potential factors including inundation
October 2012
Public Review Draft
M.13
depth, velocity, and building type and construction. Average damage is unlikely to cause total
destruction, and is estimated to be 20 percent of the total building value.
District facilities in the dam inundation zone are shown in Figure M.2. A summary table is
shown in Table M.4.
October 2012
Public Review Draft
M.14
Figure M.2.
Dam Inundation Areas in the Twin Rivers District Area
October 2012
Public Review Draft
M.15
Table M.4.
Summary of Twin Rivers School District Facilities and Values in the Folsom
Dam Inundation Zone
Buidling Count
Occupancy
Building Value
Content Value
Total Value
Loss Estimate
66
16,895
$387,901,268
$387,901,268
$775,802,536
$155,160,507.20
Source: City of Sacramento GIS, Twin Rivers School District, Hazus
Table M.5.
Table M.3.
Twin Rivers School District Facilities, Occupancies, and
Values in the Folsom Dam Inundation Zone
Building Name
Physical Address
Occupancy
Babcock Park
2400 Cormorant Way,
Sacramento, 95815
0
Babcock, D W
Elementary
2400 Cormorant Way,
Sacramento, 95815
Castori, Michael J.
Elementary
Building Value
Dam Inundation
N/A
Yes
400
$6,494,106
Yes
95838
750
$7,657,585
Yes
Del Paso Heights
Elementary
95838
290
$7,596,650
Yes
Del Paso Heights
Elementary
95838
290
N/A
Yes
DPH Park
95838
0
N/A
Yes
Dry Creek
Elementary
1230 G St., Rio Linda, 95673
115
$6,852,660
Yes
Dry Creek
Elementary
1230 G St., Rio Linda, 95673
115
N/A
Yes
Dry Creek
Elementary
1230 G St., Rio Linda, 95673
115
N/A
Yes
Dry Creek
Elementary
1230 G St., Rio Linda, 95673
115
N/A
Yes
East Natomas
Educational Complex
5921 E. Levee Rd
0
N/A
Yes
East Natomas
Educational Complex
5922 E. Levee Rd
0
N/A
Yes
East Natomas
Educational Complex
5924 E. Levee Rd
0
N/A
Yes
East Natomas
Educational Complex
5925 E. Levee Rd
0
N/A
Yes
East Natomas
Educational Complex
5926 E. Levee Rd
0
$67,947,365
Yes
East Natomas
Educational Complex
(Not Mapped)
5923 E. Levee Rd
0
N/A
Yes
$6,968,540
Yes
N/A
Yes
Fairbanks Elementary 227 Fairbanks Ave.,
Sacramento, 95838
Frito-Lay Land
Purchase
435
95673
October 2012
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0
M.16
Building Name
Physical Address
Occupancy
Building Value
Dam Inundation
Garden Valley
Elementary
3601 Larchwood Dr.,
Sacramento, 95834
410
$3,601,260
Yes
Grand Ave. Admin.
Offices
1333 Grand Ave., Sacramento,
95838
55
$7,604,370
Yes
Grant High
95838
1,035
$45,591,240
Yes
Grant West
95838
1,035
$15,369,260
Yes
Hagginwood
Elementary
Sacramento, 95815
455
$6,989,112
Yes
Hayer Park (RLPA)
Park
1101 "G" St., Rio Linda, 95673
0
N/A
Yes
Higher Learning
Academy
2625 Plover St., Sacramento,
95815
115
$800,000
Yes
Higher Learning
Academy
95815
115
N/A
Yes
Johnson, Harmon
Elementary 2.0
Sacramento, 95815
635
$12,644,380
Yes
Johnson, Harmon
Elementary, Old
2591 Edgewater Rd.,
Sacramento, 95815
0
N/A
Yes
King, Jr,. Martin
Luther JHS Off-Site
(Old Maintenance
Site)
547 Arcade Blvd, Sacramento,
95815
0
N/A
Yes
King, Jr,. Martin
Luther JHS Off-Site
(Old Maintenance
Site)
549 Arcade Blvd
0
N/A
Yes
King, Jr,. Martin
Luther JHS Off-Site
(Old Maintenance
Site)
555 Arcade Blvd
0
N/A
Yes
King, Jr,. Martin
Luther JHS Off-Site
(Old Maintenance
Site)
557 Arcade Blvd
0
N/A
Yes
King, Jr,. Martin
Luther JHS Off-Site
(Old Maintenance
Site)
559 Arcade Blvd
0
N/A
Yes
King, Jr,. Martin
Luther Technology
Academy
3051 Fairfield St., Sacramento,
95815
365
$19,448,020
Yes
King, Jr,. Martin
Luther Technology
Academy
3051 Fairfield St., Sacramento,
95815
365
N/A
Yes
Maint./Food/Transp. Taft Street
2628 Taft St., Sacramento,
95815
15
$2,212,790
Yes
75
$1,563,560
Yes
Maint./Oper./Transp. - 6619 6th Ave., Rio Linda, 95673
Rio Linda
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M.17
Building Name
Physical Address
Occupancy
Building Value
Dam Inundation
Meister Site
0
N/A
Yes
Morey Avenue Pre K
-K
95838
30
$3,230,960
Yes
Morey Avenue Pre K
-K
95838
30
N/A
Yes
Morey Avenue Pre K
-K
95838
30
N/A
Yes
Morey Avenue Pre K
-K
95838
30
N/A
Yes
Noralto Elementary
Sacramento, 95815
750
$8,155,470
Yes
North Avenue
Elementary
1281 North Ave., Sacramento,
95838
0
$5,694,600
Yes
Northwood
Elementary
95815
535
$8,629,790
Yes
Norwood Jr. High
4601 Norwood Ave.,
Sacramento, 95838
405
$12,819,160
Yes
Norwood Jr. High
4601 Norwood Ave.,
Sacramento, 95838
405
N/A
Yes
$585,300
Yes
Nutrition - I Street Rio 2041 I St, Rio Linda, 95673
Linda
0
Orchard Elementary
1040 Q St., Rio Linda, 95673
255
$10,369,190
Yes
Orchard Elementary
1040 Q St., Rio Linda, 95673
255
N/A
Yes
Regency Park
Elementary
Sacramento, 95835
915
$9,635,770
Yes
Rio Linda Elementary
631 L St., Rio Linda, 95673
0
$7,586,880
Yes
Rio Linda High
6309 Dry Creek Rd., Rio Linda,
95673
1,930
$33,047,090
Yes
Rio Linda High
Stadium
95673
0
N/A
Yes
Rio Linda Prep
Academy
1101 "G" St., Rio Linda, 95673
500
$10,315,100
Yes
Rio Tierra Jr. High
Sacramento, 95833
625
$12,245,530
Yes
Robinson, Fred K.
Admin. Offices
670 Dixieanne Ave.,
Sacramento, 95815
0
$7,281,330
Yes
Smythe, Alethea B.
Charter (7-8)
700 Dos Rios St., Sacramento,
95811
455
Smythe, Alethea B.
Charter (K-6)
Sacramento, 95833
665
$6,249,880
Yes
Strauch, Hazel
Elementary
Sacramento, 95833
600
$6,281,010
Yes
Terrace Park
0
N/A
Yes
Terrace Park
0
N/A
Yes
1400B Grand Ave., Sacramento,
95838
60
$976,300
Yes
October 2012
Public Review Draft
$5,972,380
Yes
M.18
Building Name
Physical Address
Occupancy
Vineland (Pre) /
Pathways (Alt.)
6450 20th St., Rio Linda, 95673
55
$7,916,235
Yes
West 4th Ave / E
Street
Undeveloped
0
N/A
Yes
West 4th Ave / Q
Street
Undeveloped
0
N/A
Yes
Westside Elementary
6537 West 2nd St., Rio Linda,
95673
585
$5,961,960
Yes
480
$5,606,435
Yes
Woodlake Elementary 700 Southgate Rd., Sacramento,
95815
Total
16,895
Building Value
Dam Inundation
$387,901,268
Source: City of Sacramento GIS, Twin Rivers School District
Note:
There was one East Natomas Education Complex that was not mapped since it could not be
located. This facility was not included in the dam failure analysis.
Earthquake
Ground shaking is the primary earthquake hazard. Many factors affect the survivability of
structures and systems from earthquake-caused ground motions. These factors include proximity
to the fault, direction of rupture, epicenter location and depth, magnitude, local geologic and
soils conditions, types and quality of construction, building configurations and heights, and
comparable factors that relate to utility, transportation, and other network systems. Ground
motions become structurally damaging when average peak accelerations reach 10 to 15 percent
of gravity, average peak velocities reach 8 to 12 centimeters per second, and when the Modified
Mercalli Intensity Scale is about VII (18-34 percent peak ground acceleration), which is
considered to be very strong (general alarm; walls crack; plaster falls).
Earthquake losses will vary across the District depending on the source and magnitude of the
event and the nature and type of building construction. A map showing peak ground
accelerations in Sacramento County and the District is shown in Figure M.3. Approximate
boundaries for the District are indicated by the yellow rectangle. The darker red tones denote
areas of greater shaking. The earthquake scenario run for the 2011 LHMP for Sacramento
County provides a good estimate of loss to the planning area based on a realistic earthquake
scenario. The results of this scenario are described in Section 4.3.6 of the base plan.
October 2012
Public Review Draft
M.19
Figure M.3.
Twin Rivers School District Earthquake Shaking Map
October 2012
Public Review Draft
M.20
2011 Earthquake Scenarios
HAZUS-MH MR-4 was utilized to model earthquake losses for Sacramento County.
Specifically, the probable magnitude used for Sacramento County utilized a 7.0 magnitude
earthquake. Level 1 analyses were run, meaning that only the default data was used and not
supplemented with local building inventory or hazard data. There are certain data limitations
when using the default data, so the results should be interpreted accordingly; this is a planning
level analysis.
The methodology for running the probabilistic earthquake scenario used probabilistic seismic
hazard contour maps developed by the U.S. Geological Survey (USGS) for the 2002 update of
the National Seismic Hazard Maps that are included with HAZUS-MH. The USGS maps
provide estimates of potential ground acceleration and spectral acceleration at periods of 0.3
second and 1.0 second, respectively. The 2,500 year return period analyzes ground shaking
estimates with a 2 percent probability of being exceeded in 50 years, from the various seismic
sources in the area. The International Building Code uses this level of ground shaking for
building design in seismic areas and is more of a worst case scenario.
Figure M.4 illustrates economic loss within Sacramento County and the District associated with
the probabilistic earthquake scenario shown in Table 4.53 in Section 4.3.6 of the base plan.
Approximate boundaries for the District are indicated by the yellow rectangle. Specific damages
to facilities owned by the District were not available in this analysis.
October 2012
Public Review Draft
M.21
Figure M.4.
Twin Rivers School District 2,500-year Probabilistic Scenario
October 2012
Public Review Draft
M.22
Flood: 100/200/500-year
The District is traversed by several stream systems and is at risk to both riverine flooding and
localized stormwater flooding. As previously described in Section 4.2.8 of the main plan, the
Sacramento County Planning Area and the District have been subject to previous occurrences of
flooding.
Values at Risk
Unincorporated Sacramento County and its incorporated jurisdictions have FEMA Preliminary
DFIRM flood zones dated 1/31/2011. GIS was used to determine the possible impacts of
flooding on the schools within the Twin Rivers USD. Twin Rivers USD provided occupancy
and building values that was available for each school. The following methodology was
followed in determining school counts and values at risk to the 1% and 0.2% annual chance
flood event.
Methodology
The District’s school locations were used as the basis for this analysis. The District provided
occupancy and building values for each school. GIS was used to create a centroid, or a point
representing the center of the School’s parcel polygon. Preliminary DFIRM flood data was then
overlaid on the school centroids. For the purposes of this analysis, the flood zone that intersected
a school centroid was assigned the flood zone for the entire school. Based on Hazus guidance,
contents value is estimated at 100 percent of the improved value for schools and libraries.
Analysis results are presented in two parts:
1) A summary table (Table M.6) shows the count and improved value of schools that fall in a
floodplain by flood zone. X Protected by Levee zones are excluded from the table, as they
are detailed in Table M.8.
2) A detailed table (Table M.7) sorts the name, address, occupancy, and building value of
schools by 1% and 0.2% annual chance flood event.
Figure M.5 shows the location of all District properties that fall in the 1% or 0.2% annual chance
floodplains. Discussions of each floodplain can be found in Section 4.2.13 of the base plan.
Note:
located. This facility was not included in the flood analysis.
October 2012
Public Review Draft
M.23
Figure M.5.
Twin Rivers School District Facilities in the DFIRM Floodplain
October 2012
Public Review Draft
M.24
Table M.6.
Summary Count and Value of District Buildings in the Floodplain
Number of
Buildings
Occupancy
Building
Value
Contents
Value
0.2% Chance
5
930
$15,046,778
$15,046,778
$30,094,491
Total 500-year flood
5
930
$15,046,778
$15,046,778
$30,094,491
Zone AE
13
3,005
$105,683,315
$105,683,315
$211,369,648
Zone AO
1
170
$6,179,100
$6,179,100
$12,358,371
Total 100-year flood
14
3,175
$111,862,415
$111,862,415
$223,728,019
Total 100-/500-year flood
19
4,105
$126,909,193
$126,909,193
$253,822,510
Zone X
54
21,165
$500,822,778
$500,822,778
$1,001,666,775
Total outside floodplain
(excluding levee
protection zones)
54
21,165
$500,822,778
$500,822,778
$1,001,666,775
Flood Zone
Total Value
Source: FEMA, Twin Rivers School District, Hazus
Table M.7.
Twin Rivers School District Properties and Occupancy in the 1% and 0.2%
Chance Floodplain
Building Name
Physical Address
Occupancy
Building Value
Flood Zone
Babcock, D W
Elementary
2400 Cormorant Way,
Sacramento, 95815
400
$6,494,106 0.2% Annual Chance
Hagginwood
Elementary
Sacramento, 95815
455
Maint./Oper./Transp. - 6619 6th Ave., Rio Linda,
Rio Linda
95673
75
West 4th Ave / E
Street
Undeveloped
0
$0 0.2% Annual Chance
West 4th Ave / Q
Street
Undeveloped
0
$0 0.2% Annual Chance
East Natomas
Educational Complex
5921 E. Levee Rd
0
$0
Zone AE
East Natomas
Educational Complex
5922 E. Levee Rd
0
$0
Zone AE
East Natomas
Educational Complex
5924 E. Levee Rd
0
$0
Zone AE
East Natomas
Educational Complex
5925 E. Levee Rd
0
$0
Zone AE
East Natomas
Educational Complex
5926 E. Levee Rd
0
$67,947,365
Zone AE
Garden Valley
Elementary
3601 Larchwood Dr.,
Sacramento, 95834
410
$3,601,260
Zone AE
Meister Site
$0
Zone AE
October 2012
0
Public Review Draft
M.25
Building Name
Physical Address
Occupancy
Regency Park
Elementary
Sacramento, 95835
Rio Linda High
Stadium
6411 Dry Creek Rd., Rio
Linda, 95673
Rio Tierra Jr. High
Sacramento, 95833
Smythe, Alethea B.
Charter (7-8)
Flood Zone
$9,635,770
Zone AE
$0
Zone AE
625
$12,245,530
Zone AE
700 Dos Rios St., Sacramento,
95811
455
$5,972,380
Zone AE
Strauch, Hazel
Elementary
Sacramento, 95833
600
$6,281,010
Zone AE
Terrace Park
Undeveloped/Greg Thatch
Circle
0
$0
Zone AE
Terrace Park
Undeveloped/Greg Thatch
Circle
0
$0
Zone AE
Larchmont
Elementary
6560 Melrose Dr., No.
Highlands, 95660
170
$6,179,100
Zone AO
Aero Haven
Elementary
5450 Georgia Dr., No.
Highlands, 95660
190
$6,133,070
Zone X
Allison, Warren A.
Elementary
Highlands, 95660
275
$6,432,540
Zone X
Allison, Warren A.
Elementary
Highlands, 95660
275
$0
Zone X
1690 Bell Avenue,
Sacramento, 95838
0
$0
Zone X
Castori, Michael J.
Elementary
95838
750
$7,657,585
Zone X
Creative Conn. Arts
7201 Arutas Dr., No.
Highlands, 95660
540
$5,765,220
Zone X
Creative Conn. Arts
6444 Walerga Rd, No.
Highlands, 95660
105
$12,905,740
Zone X
Del Paso Heights
Elementary
95838
290
$7,596,650
Zone X
Del Paso Heights
Elementary
95838
290
$0
Zone X
District Office
5115 Dudley Blvd, McClellan,
95652
330
$67,947,365
Zone X
Dry Creek
Elementary
1230 G St., Rio Linda, 95673
115
$6,852,660
Zone X
Dry Creek
Elementary
1230 G St., Rio Linda, 95673
115
$0
Zone X
Dry Creek
Elementary
1230 G St., Rio Linda, 95673
115
$0
Zone X
Dry Creek
Elementary
1230 G St., Rio Linda, 95673
115
$0
Zone X
Foothill High
5000 McCloud Dr.,
Sacramento, 95842
$32,080,190
Zone X
October 2012
915
Building Value
0
1,270
Public Review Draft
M.26
Building Name
Physical Address
Occupancy
Building Value
Flood Zone
Foothill Oaks
Elementary
5520 Lancelot Dr.,
Sacramento, 95842
580
$7,980,830
Zone X
Foothill Ranch Jr.
High
5001 Diablo Dr., Sacramento,
95842
765
$14,581,580
Zone X
Frito-Lay Land
Purchase
95673
$0
Zone X
Frontier Elementary
Sacramento, 95842
545
$7,039,520
Zone X
Future Charter
School (7-12)
3701 Stephen Dr., No.
Highlands, 95660
565
$0
Zone X
Grand Ave. Admin.
Offices
95838
55
$7,604,370
Zone X
Grant High
95838
1,035
$45,591,240
Zone X
Grant West
95838
1,035
$15,369,260
Zone X
Hayer Park (RLPA)
Park
1101 G St., Rio Linda, 95673
0
$0
Zone X
Higher Learning
Academy
95815
115
$800,000
Zone X
Higher Learning
Academy
95815
115
$0
Zone X
Highlands Academy
of Art & Design
6601 Guthrie Way, No.
Highlands, 95660
925
$30,536,620
Zone X
Hillsdale Elementary
Highlands, 95660
460
$7,069,330
Zone X
Information
Technology Offices
5201 Arnold Way, McClellan,
95652
50
$0
Zone X
Joyce, Frederick C.
Elementary
6050 Watt Ave., No.
Highlands, 95660
605
$7,371,345
Zone X
Kohler Elementary
4004 Bruce Way, No.
Highlands, 95660
510
$6,663,290
Zone X
Madison Elementary
5241 Harrison St., No.
Highlands, 95660
680
$7,832,480
Zone X
Maint./Food/Transp. Taft Street
95815
15
$2,212,790
Zone X
Murchison Center
5703 Skvarla, Bldg. 1407,
McClellan, 95652
0
$4,037,430
Zone X
Northwood
Elementary
95815
535
$8,629,790
Zone X
$585,300
Zone X
Linda
0
0
Oakdale Elementary
3708 Myrtle Ave., No.
Highlands, 95660
555
$7,243,120
Zone X
Orchard Elementary
1040 Q St., Rio Linda, 95673
255
$10,369,190
Zone X
Orchard Elementary
1040 Q St., Rio Linda, 95673
255
$0
Zone X
October 2012
Public Review Draft
M.27
Building Name
Physical Address
Occupancy
Building Value
Flood Zone
Pacific Career &
Technology High
3800 Bolivar Ave., No.
Highlands, 95660
150
$14,282,860
Zone X
Pioneer Elementary
5816 Pioneer Way,
Sacramento, 95841
695
$6,730,628
Zone X
Richmond, Miles P.
School
Highlands, 95660
60
$2,729,260
Zone X
Ridgepoint
Elementary
4680 Monument Dr.,
Sacramento, 95842
745
$7,132,630
Zone X
Rio Linda Elementary
631 L St., Rio Linda, 95673
0
$7,586,880
Zone X
Rio Linda High
6309 Dry Creek Rd., Rio
Linda, 95673
1,930
$33,047,090
Zone X
Rio Linda Prep
Academy
1101 G St., Rio Linda, 95673
500
$10,315,100
Zone X
Sierra View
Elementary
3638 Bainbridge Dr., No.
Highlands, 95660
505
$6,133,590
Zone X
1400B Grand Ave.,
Sacramento, 95838
60
$976,300
Zone X
Village Elementary
Highlands, 95660
645
$6,210,970
Zone X
Vineland (Pre) /
Pathways (Alt.)
6450 20th St., Rio Linda,
95673
55
$7,916,235
Zone X
Vista Nueva Career & 2035 North Ave., Sacramento,
Tech High/NOVA
95838
185
$5,584,650
Zone X
Westside Elementary
585
$5,961,960
Zone X
Winona Admin Center 3222 Winona Way, No.
Highlands, 95660
105
$33,840,000
Zone X
Woodridge
Elementary
515
$7,486,120
Zone X
95673
5761 Brett Dr., Sacramento,
95842
Total
25,270
$627,731,971
Source: FEMA, Twin Rivers School District
Flood: Localized Stormwater
Historically, the District has been at risk to flooding primarily during the spring months when
river systems in the County swell with heavy rainfall. Localized flooding also occurs throughout
the planning area at various times throughout the year with several areas of primary concern
unique to the District. Mapping of these areas is an ongoing effort by the County and
countywide maps that include the area covered by the District should be available by the next
plan update. However, known affected localized flood areas and associated values identified by
the County are included in Section 4 of the base plan. The District could not provide any
specific data on areas of localized flooding that directly affect District properties.
The risk of stormwater/localized flooding to future development can be minimized by accurate
recordkeeping of repetitive localized storm activity. Mitigating the root causes of the localized
stormwater will reduce future risks of losses due to stormwater/localized flooding.
October 2012
Public Review Draft
M.28
Levee Failure
Generally, levees fail due to overtopping or collapse. A catastrophic levee failure resulting from
collapse probably will occur very quickly with relatively little warning. Such a failure would
occur where the levee is saturated and the high hydrostatic water pressure on the river side,
coupled with erosion of the levee from high water flows or an inherent defect in the levee that
causes an almost instant collapse of a portion of the levee. Under such circumstances, structures
located relatively near the break will suffer immediate and extensive damage. Several hundred
yards away from the break the energy of the flood waters will be dispersed sufficiently to reduce,
but not eliminate, flooding damage to structures in its path. The flood water will flow in a
relatively shallow path toward any low point in the affected area. Flood water will collect in
these low areas and the levels will rise as the flow continues. When the rivers are high, it is not
possible to close or repair a levee break until the water surface in the river and the flooded area
equalize.
Floods can threaten the District from several sources. Usually, the possibility of flooding can be
anticipated from eight to twenty hours before the “Emergency Period” is reached. However, as
demonstrated in Linda, California, in February 1986, it is possible for a levee to collapse with
little or no warning when there are still four or more feet of freeboard available.
Methodology
Unincorporated Sacramento County and the District have mapped flood hazard areas. GIS was
used to determine the possible impacts of flooding within the County, and how the risk varies
across the planning area. The following methodology was followed in structures and values at
risk to levee failure.
Twin Rivers School District facility list was used as the basis for school inventory, occupancy,
and building values. The FEMA Preliminary DFIRM, made available on January 31, 2011, was
used as the flood hazard for this analysis.
GIS was used to create a centroid, or point representing the center of each school’s parcel
polygon. DFIRM flood data was then overlayed on the parcel centroids. For the purposes of this
analysis, the flood zone that intersected a parcel centroid was assigned the flood zone for each
school.
Values and Populations at Risk
Table M.8 contains levee failure analysis results for the District. This table shows the number of
schools at risk to levee failure events for the District. There are 23 schools with a structure value
of $88,098,775 in the X Protected by Levee zone in the District. 4,625 students, faculty, and
staff occupy these schools and would be at risk to levee failure.
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Note:
located. This facility was not included in the levee failure analysis.
Table M.8.
Summary of Twin Rivers School District Properties at Risk to Levee Failure
Zone
X Protected by
Levee
Number of
Buildings
Occupancy
Building Value
Contents Value
Total Value
23
4,625
$88,098,775
$88,098,775
$176,202,198
Source: FEMA, Twin Rivers School District, Hazus
Table M.9.
Count, Structure Value, and Occupancy of Schools in X Protected by Levee
Zone
Building Name
Physical Address
Occupancy
Building
Value
Flood Zone
Babcock Park
2400 Cormorant Way,
Sacramento, 95815
0
N/A Zone X Protected by Levee
DPH Park
95838
0
Fairbanks Elementary
227 Fairbanks Ave.,
Sacramento, 95838
435
$6,968,540 Zone X Protected by Levee
Johnson, Harmon
Elementary 2.0
Sacramento, 95815
635
Johnson, Harmon
Elementary, Old
2591 Edgewater Rd.,
Sacramento, 95815
0
King, Jr,. Martin Luther
JHS Off-Site (Old
Maintenance Site)
95815
0
JHS Off-Site (Old
Maintenance Site)
549 Arcade Blvd
0
JHS Off-Site (Old
Maintenance Site)
555 Arcade Blvd
0
JHS Off-Site (Old
Maintenance Site)
557 Arcade Blvd
0
JHS Off-Site (Old
Maintenance Site)
559 Arcade Blvd
0
Technology Academy
3051 Fairfield St.,
Sacramento, 95815
365
Technology Academy
3051 Fairfield St.,
Sacramento, 95815
365
Morey Avenue Pre K K
95838
30
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Building Name
Building
Value
Physical Address
Occupancy
95838
30
95838
30
95838
30
Noralto Elementary
Sacramento, 95815
750
North Avenue
Elementary
1281 North Ave., Sacramento,
95838
0
Norwood Jr. High
4601 Norwood Ave.,
Sacramento, 95838
405
Norwood Jr. High
4601 Norwood Ave.,
Sacramento, 95838
405
Robinson, Fred K.
Admin. Offices
670 Dixieanne Ave.,
Sacramento, 95815
0
Smythe, Alethea B.
Charter (K-6)
Sacramento, 95833
665
Woodlake Elementary
700 Southgate Rd.,
Sacramento, 95815
480
Total
4,625
Flood Zone
$88,098,775
Source: FEMA, Twin Rivers School District
Severe Weather: Freeze
Vulnerability to winter storms and extreme cold is difficult to quantify, as these are not mapped
or geographically specific hazards. Most losses in the District associated with this hazard come
in the form of power outages or and bursting pipes. Severe ice is often associated with winter
storms. An icy roadway on a bridge or in a busy intersection threatens the safety of students on
buses. Delays in emergency response services and a halt of public utilities’ services are of
concern.
In the event of a severe winter storm or extreme cold, populations with special needs such as
elementary school students are of particular concern; as they are most vulnerable to adverse
conditions and temperatures. Approximately 16,570 students in elementary or pre-kindergarten
these would be at risk to severe weather.
River/Stream/Creek Bank Erosion
The District is situated on a thermal belt in a relatively flat area, as is much of the central
California area, resulting in flooding and erosion in the spring. As a result, the District has
experienced a number of problems, including flooding due to eroded stream banks. The District
intends, as a matter of policy, to address these issues in the hazard mitigation plan and as a
matter of course for district procedure.
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Severe Weather: Extreme Heat
California area, resulting in excessive heat during late spring and early fall seasons. As a result,
the District has experienced a number of problems, including a death from heat exhaustion. In
the event of extreme heat, populations with special needs such as elementary school students are
of particular concern; as they are most vulnerable to extreme temperatures. Approximately
16,570 students in elementary or pre-kindergarten these would be at risk to extreme heat. The
District intends, as a matter of policy, to address these issues in the hazard mitigation plan and as
a matter of course for district procedure.
Severe Weather: Fog
California area, resulting in fog in the winter. As a result, the District has experienced a number
of problems, including fog-related accidents. In the event of fog, transporting children to and
from elementary school students is of particular. Approximately 16,570 students in elementary
or pre-kindergarten these would be at risk to transportation incidents resulting from fog. The
District intends, as a matter of policy, to address these issues in the hazard mitigation plan and as
a matter of course for district procedure.
Severe Weather: Heavy Rain and Storms
According to historical hazard data, severe weather is an annual occurrence in the District and
Sacramento County as a whole. Damage and disaster declarations related to severe weather have
occurred and will continue to occur in the future. Heavy rain and thunderstorms are the most
frequent type of severe weather occurrences in the District. Wind and lightning often
accompany these storms and have caused damage in the past. However, actual damage
associated with the primary effects of severe weather has been limited. It is the secondary
hazards caused by weather, such as floods and fires that have had the greatest impact on the
District.
Severe Weather: Tornadoes
All District properties are at risk to tornadoes. When the randomness of tornado location and the
random location of schools within the District are considered, the planning team does not
consider any one area at a greater risk to tornadoes than any other. Thus, the risk of tornadoes is
the same across the District. The risk does not vary from school to school. This is because
tornadoes are just as likely to hit one location as another within the District. The exposure to
tornadoes does vary from school to school, as indicated by the building values and occupancy
differences in each school. The area that tornadoes strike is random, depending upon the
location of the weather system spawning them.
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Tornadoes need to be given serious consideration in this assessment, because if and when they
do strike a school, the impact can be devastating. Tornadoes can impact the District by
destroying buildings and infrastructure within seconds. Tornadoes can cause numerous human
injuries or fatalities. They can create tremendous debris removal problems, overwhelm building
departments, and psychologically scar students, faculty, and staff.
There are limited things that can be done to reduce the damages caused by tornadoes – though
recently, significant strides have been made to improve life safety during these events – most
notably through improved warning systems and the building of designated shelters.
Wildfire
Major fires are generally categorized as either a conflagration or wildland/forestland. A
conflagration may involve residential or commercial areas and spreads across both natural and
constructed barriers. Wildland is associated with open range grasslands and into the foothills of
a particular area. Because of development in rural areas adjacent to and within the District, a
third classification is emerging, the Wildland Urban Interface (WUI) wildfire. The WUI wildfire
is one that burns along the urban/rural interface and can result in major losses of property and
structures. The WUI wildfire hazard is what is address in this LHMP.
A number of factors affect the behavior of wildland and interface fires, including terrain,
weather, wind, fuels and seasons. It is well known that fire travels faster uphill than down and is
more difficult to fight on steep slopes than on level ground. When weather is hot and the
humidity is low, wildland fires can explode with intensity of rapid combustion. Even in the
absence of strong winds, a fast-moving fire can generate its own updrafts, particularly in
canyons, causing burning brands to be carried high in the air and drop a long distance ahead.
This results in spot fires over a wide radius as the wind changes its direction.
The District is not immune to numerous types of grass and brush fires and any one of them may
accelerate into a large urban interface wildfire. Such a situation could lead to evacuation of large
portions of the population and the potential for significant loss of personal property, structures
and rangeland. The natural fuels available near District properties vary greatly in the rate and
intensity of burning. Fires in heavy brush and stands of trees burn with great intensity but more
slowly than in dry grass and leaves. Dense fuels will propagate fire better than sparse fuels. The
local fire season generally extends from June through late September or early October.
During extremely windy conditions, both small and large-scale fires will generate enough smoke
to necessitate the closing of key transportation routes. It may be necessary to close streets and/or
re-route traffic to maintain traffic lanes and access for firefighting apparatus. Large parking
areas may be cordoned off for the staging of various types of resources needed during large-scale
emergencies. All of these may affect busing and transportation of students, faculty, and staff to
and from District schools.
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Figure M.6 shows wildfire risk in the District. Wildfire threat within the District ranges from
low to moderate.
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Figure M.6.
Twin Rivers School District Wildfire Threat
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Values at Risk
The California Department of Forestry and Fire (Cal FIRE) develops and maintains datasets
related to wildland fire threat and risk. The Fire Threat dataset, created in 2004, was used for
analysis on the Twin Rivers USD school locations. The District provided occupancy and
building values for each school.
The Fire Threat dataset is a combination of fire frequency, or the likelihood of a given area to
burn, and potential fire behavior. Fire rotation is calculated using fifty years of fire history, as
well as climate, vegetation, and land ownership information. Fuel rank is calculated based on
expected fire behavior for unique combinations of topography and vegetative fuels under given
weather conditions (wind speed, humidity, temperature, and fuel moistures). Fuel rank and fire
rotation are then combined to create the five threat classes in the Fire Threat dataset, ranging
from Little or No Threat to Extreme Threat.
Methodology
GIS was used to create a centroid, or a point representing the center of the school’s parcel
polygon. Fire Threat was then overlaid on the parcel centroids. For the purposes of this
analysis, the wildfire threat zones (Little or No Threat | Moderate | High | Very High | Extreme)
that intersected a parcel centroid was assigned as the threat zone for the entire parcel. Based on
Hazus guidance, contents value is estimated at 100 percent of the improved value for schools and
libraries.
Analysis results are presented in two parts:
1) A summary table (Table M.10) shows the count and improved value of schools that fall in a
floodplain by flood zone.
2) A detailed table (Table M.11) sorts the name, address, occupancy, and building value of
schools by 1% and 0.2% annual chance flood event.
Note:
located. This facility was not included in the wildfire failure analysis.
Table M.10.
Twin Rivers School District Properties, Occupancies, and Values by
Wildfire Threat Zone
Number of
Schools
Occupancy
Little or No Threat
39
12,310
$313,662,519
$313,662,519
Moderate
57
17,585
$402,168,227
$402,168,227
$804,354,096
Total
96
29,895
$715,830,746
$715,830,746
$1,431,691,483
Fire Threat
Building Value
Contents Value
Total Value
$627,337,387
Source: Cal FIRE, Twin Rivers School District, Hazus
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Table M.11.
Twin Rivers School District Properties in the Moderate or Greater Fire
Threat Zone
School Name
Physical Address
Occupancy
Building Value
Fire Threat
Aero Haven
Elementary
5450 Georgia Dr., No.
Highlands, 95660
190
$6,133,070
Moderate
Allison, Warren A.
Elementary
Highlands, 95660
275
$6,432,540
Moderate
Babcock Park
2400 Cormorant Way,
Sacramento, 95815
0
N/A
Moderate
1690 Bell Avenue, Sacramento,
95838
0
N/A
Moderate
Creative Conn. Arts
7201 Arutas Dr., No. Highlands,
95660
540
$5,765,220
Moderate
Creative Conn. Arts
6444 Walerga Rd, No.
Highlands, 95660
105
$12,905,740
Moderate
Del Paso Heights
Elementary
95838
290
$7,596,650
Moderate
DPH Park
95838
0
N/A
Moderate
Dry Creek
Elementary
1230 G St., Rio Linda, 95673
115
N/A
Moderate
East Natomas
Educational Complex
5921 E. Levee Rd
0
N/A
Moderate
East Natomas
Educational Complex
5922 E. Levee Rd
0
N/A
Moderate
East Natomas
Educational Complex
5924 E. Levee Rd
0
N/A
Moderate
East Natomas
Educational Complex
5925 E. Levee Rd
0
N/A
Moderate
East Natomas
Educational Complex
5926 E. Levee Rd
0
$67,947,365
Moderate
Fairbanks
Elementary
227 Fairbanks Ave.,
Sacramento, 95838
435
$6,968,540
Moderate
Foothill High
5000 McCloud Dr.,
Sacramento, 95842
1,270
$32,080,190
Moderate
Foothill Oaks
Elementary
5520 Lancelot Dr., Sacramento,
95842
580
$7,980,830
Moderate
Foothill Ranch Jr.
High
5001 Diablo Dr., Sacramento,
95842
765
$14,581,580
Moderate
Frito-Lay Land
Purchase
95673
N/A
Moderate
Frontier Elementary
Sacramento, 95842
545
$7,039,520
Moderate
Future Charter
School (7-12)
3701 Stephen Dr., No.
Highlands, 95660
565
N/A
Moderate
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School Name
Physical Address
Occupancy
Building Value
Fire Threat
Garden Valley
Elementary
3601 Larchwood Dr.,
Sacramento, 95834
410
$3,601,260
Moderate
Grand Ave. Admin.
Offices
95838
55
$7,604,370
Moderate
Grant High
95838
1,035
$45,591,240
Moderate
Grant West
95838
1,035
$15,369,260
Moderate
Hagginwood
Elementary
Sacramento, 95815
455
$6,989,112
Moderate
Hayer Park (RLPA)
Park
1101 "G" St., Rio Linda, 95673
0
N/A
Moderate
Higher Learning
Academy
95815
115
N/A
Moderate
Highlands Academy
of Art & Design
Highlands, 95660
925
$30,536,620
Moderate
Johnson, Harmon
Elementary, Old
2591 Edgewater Rd.,
Sacramento, 95815
0
N/A
Moderate
King, Jr,. Martin
Luther JHS Off-Site
(Old Maintenance
Site)
95815
0
N/A
Moderate
Kohler Elementary
4004 Bruce Way, No.
Highlands, 95660
$6,663,290
Moderate
Meister Site
0
N/A
Moderate
Morey Avenue Pre K
-K
95838
30
$3,230,960
Moderate
Morey Avenue Pre K
-K
95838
30
N/A
Moderate
Morey Avenue Pre K
-K
95838
30
N/A
Moderate
Morey Avenue Pre K
-K
95838
30
N/A
Moderate
Noralto Elementary
Sacramento, 95815
750
$8,155,470
Moderate
Norwood Jr. High
4601 Norwood Ave.,
Sacramento, 95838
405
N/A
Moderate
$585,300
Moderate
510
Linda
0
Oakdale Elementary
3708 Myrtle Ave., No.
Highlands, 95660
555
$7,243,120
Moderate
Pacific Career &
Technology High
3800 Bolivar Ave., No.
Highlands, 95660
150
$14,282,860
Moderate
Regency Park
Elementary
Sacramento, 95835
915
$9,635,770
Moderate
Richmond, Miles P.
School
Highlands, 95660
60
$2,729,260
Moderate
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School Name
Physical Address
Occupancy
Rio Linda High
Stadium
95673
0
Rio Tierra Jr. High
Sacramento, 95833
Smythe, Alethea B.
Charter (K-6)
Building Value
Fire Threat
N/A
Moderate
625
$12,245,530
Moderate
Sacramento, 95833
665
$6,249,880
Moderate
Strauch, Hazel
Elementary
Sacramento, 95833
600
$6,281,010
Moderate
1400B Grand Ave.,
Sacramento, 95838
60
$976,300
Moderate
Village Elementary
Highlands, 95660
645
$6,210,970
Moderate
Vineland (Pre) /
Pathways (Alt.)
6450 20th St., Rio Linda, 95673
55
$7,916,235
Moderate
185
$5,584,650
Moderate
Vista Nueva Career & 2035 North Ave., Sacramento,
Tech High/NOVA
95838
West 4th Ave / E
Street
Undeveloped
0
N/A
Moderate
West 4th Ave / Q
Street
Undeveloped
0
N/A
Moderate
Westside Elementary
95673
585
$5,961,960
Moderate
Woodlake
Elementary
700 Southgate Rd.,
Sacramento, 95815
480
$5,606,435
Moderate
Woodridge
Elementary
5761 Brett Dr., Sacramento,
95842
515
$7,486,120
Moderate
Total
17,585
$402,168,227
Source: Cal FIRE, Twin Rivers School District
M.6 Capability Assessment
Capabilities are the programs and policies currently in use to reduce hazard impacts or that could
be used to implement hazard mitigation activities. This capability assessment is divided into five
sections: regulatory mitigation capabilities, administrative and technical mitigation capabilities,
fiscal mitigation capabilities, mitigation outreach and partnerships, and other mitigation efforts.
M.6.1 Regulatory Mitigation Capabilities
Table M.12 lists regulatory mitigation capabilities, including planning and land management
tools, typically used by local jurisdictions to implement hazard mitigation activities and indicates
those that are in place in the District.
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Table M.12.
Twin Rivers School District Regulatory Mitigation Capabilities
Regulatory Tool (ordinances, codes,
plans)
Y/N
Date
Comments
General plan
Y
2008/2009 District Organization and Implementation Planning
Process
Zoning ordinance
N
Subdivision ordinance
N
Growth management ordinance
N
Floodplain ordinance
N
Other special purpose ordinance
(stormwater, steep slope, wildfire)
N
Building code
N
BCEGS Rating
N
Fire department ISO rating
N
Erosion or sediment control program
N
Stormwater management program
Y
TRUSD SWWP-continuously updated
Site plan review requirements
Y
By CDE as required and to verify preventative
measures established
Capital improvements plan
Y
Yes. See Facilities Master Plan
Economic development plan
N
Local emergency operations plan
Y
Community Wildfire Protection Plans
N
Flood insurance study or other
engineering study for streams
N
Elevation certificates
N
Other
Y
Version: 2011
Rating:
TRUSD Emergency Preparedness Plan
Yes
6/5/1999
Safety Plan
M.6.2 Administrative/Technical Mitigation Capabilities
Table M.13 identifies the department(s) responsible for activities related to mitigation and loss
prevention in the District.
Table M.13.
Twin Rivers School District Administrative and Technical Mitigation
Capabilities
Personnel Resources
Yes/No
Department/Position
Planner/Engineer with knowledge of land
development/land management practices
Y
Facilities/Planning
Sr. Manager Construction
Engineer/Professional trained in
construction practices related to buildings
and/or infrastructure
Y
Facilities/Planning
Planner/Engineer/Scientist with an
understanding of natural hazards
Y
Facilities/Planning
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Comments
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Personnel Resources
Yes/No
Department/Position
Personnel skilled in GIS
Y
Facilities/Planning
Full time building official
N
Floodplain Manager
N
Emergency Manager
Y
Grant writer
N
Other personnel
N
GIS Data – Hazard areas
Y
Facilities/Planning
GIS Data - Critical facilities
Y
Facilities/Planning
GIS Data – Building footprints
Y
Facilities/Planning
GIS Data – Land use
Y
Facilities/Planning
GIS Data – Links to Assessor’s data
Y
Facilities/Planning
Warning Systems/Services (Reverse 9-11,
cable override, outdoor warning signals)
Y
IT Department/Director
Comments
Facility Services
Other
M.6.3 Fiscal Mitigation Capabilities
Table M.14 identifies financial tools or resources that the District could potentially use to help
fund mitigation activities.
There are a number of Federal sources of funding for hazard mitigation projects, including;
Federal Emergency Management Agency (FEMA)
Housing and Urban Development (HUD)
US Army Corps of Engineers (USACE)
Small Business Administration (SBA)
US Department of Agriculture (USDA)
Natural Resource Conservation Service (NRCS)
National Oceanic and Atmospheric Administration (NOAA)
Federal Homeland Security Grants
Bureau of Land Management (BLM)
CA Dept. of Water Resources Flood Safe Program
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Table M.14.
Twin Rivers School District Fiscal Mitigation Capabilities
Financial Resources
Accessible/Eligible to Use (Y/N)
Comments
Community Development Block
Grants
N
Capital improvements project funding
Y
See funding analysis
Authority to levy taxes for specific
purposes
Y
As needed
Fees for water, sewer, gas, or
electric services
N
Impact fees for new development
Y
Yes, Developer Fees
Incur debt through general obligation
bonds
Y
Last GO Bond 2007
Incur debt through special tax bonds
Y
None at this time
Incur debt through private activities
N
Withhold spending in hazard prone
areas
N
Other
N
M.6.4 Mitigation Outreach and Partnerships
The district is in the process of partnering with appropriate agencies, such as the California
Department of Natural Resources, County of Sacramento, Rio Linda/Elverta Water Department,
Sacramento Regional Flood Control Agency, Arcade Creek Parks and Recreation and
neighborhood efforts to minimize loss of property and casualties of potential catastrophic event.
The district works closely with the local efforts to monitor ongoing efforts to provide safe levee
systems. The district also works closely with neighboring water districts to minimize flooding
and provide adequate drainage at sites within flood zones. The district plans to prepare and
activate a community protection/assistance initiative for the areas most critical.
The County of Sacramento, Rio Linda/Elverta Water Department, SAFCO, Arcade Creek Parks
and Recreation and Sacramento County Libraries will become partners in mitigation efforts.
M.6.5 Other Mitigation Projects and Efforts
The District is in the process of implementing an assessment and protection plan based on
National Clearinghouse of Educational Facilities (NCEF) guidelines. In addition to this, the
District has made efforts to compile emergency supplies such as emergency communications,
power, fuel and water as a part of the Emergency Preparedness Plan.
The District is creating District Standard Construction Specifications, outlining in detail the
mandatory building procedures and techniques that will be implemented in all future building.
These “standards” will include raised foundations, drainage systems and detention ponds,
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earthen berms and other natural resource protection, structural systems designed for high winds
or tornados and “safe areas” in a particular building where staff and students will collect during
catastrophic events, natural or by man.
In 2007, during the construction of a new school compound known as ENEC, various mitigation
efforts were implemented in the design. Detention ponds were constructed on a larger than
needed scale to be included as infrastructure for surrounding areas and adjacent development.
Drainage from the building and site flowed directly into the detention ponds with overflow going
directly into the County flood channels. This project was designed and constructed in
partnership with SAFCA (Sacramento Area Flood Control Agency), the County of Sacramento
and local developers.
M.7 Mitigation Strategy
This section describes the mitigation strategy process and mitigation action plan for the District’s
inclusion with the Sacramento County Multi-Hazard Mitigation Plan update.
M.7.1 Mitigation Goals and Objectives
The District adopts the hazard mitigation goals and objectives developed by the HMPC and
described in Chapter 5 Mitigation Strategy of the base plan. These are also identified in
Appendix A to this annex.
M.7.2 Mitigation Actions
The planning team for the District identified and prioritized the following mitigation actions
based on the risk assessment and in accordance with the process outline in Section 5, Mitigation
Strategy, of the base plan. Background information and information on how each action will be
implemented and administered, such as ideas for implementation, responsible office, potential
funding, estimated cost, and timeline are also included. General processes and information on
plan implementation and maintenance of this MHMP by all participating jurisdictions is included
in Section 7, Plan Implementation and Maintenance, of the base plan. The District included the
following mitigation actions as part of their district-wide mitigation strategy.
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1. Reduce Risk to Flooding of Northern Area Schools
Hazards Addressed: Flooding
Issue/Background Statement: Northern area schools within the Rio Linda community and
Eastern schools within the Natomas community have been designated as potential catastrophic
flood zones. The District is making every effort to reduce or eliminate long-term risk to life and
property from a hazardous event. This plan will include policy changes, improvements to real
property, improved outreach to agencies and neighborhoods and more inclusive flood insurance.
Other Alternatives: The District is organizing areas of refuge and community shelters that can
be utilized in the event of catastrophe.
Existing Planning Mechanisms through which Action will be implemented: The District
planning and facilities department continues to adjust the Mitigation Projects List and educating
personnel on how to identify potential hazards and what action to take to prevent or reduce
damage and injury.
Responsible Office: Facilities Services
Priority (H, M, L): High
Cost Estimate: $5,000,000
Benefits (Losses Avoided): Increased life safety and reduction of District property losses.
Potential Funding: FEMA funding, other funding to be determined.
Schedule: The District is currently planning the improvements. Over the next five years, the
District intends to have the majority of the projects completed.
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2. New drainage plans to sites within the flood areas including, site drainage, storm
drain upgrades and re-grading fields to shed water (on-site) away from buildings
Hazards Addressed: Flooding/Drainage
Issue/Background Statement: As noted previously, many of the Northern area schools within
the Rio Linda community and Eastern schools within the Natomas community have been
designated as potential catastrophic flood zones and do not have adequate drainage. The District
is in the planning phases of identifying those specific areas, assessing the existing drainage
systems and prioritizing the potential risk. Once this action is completed and depending upon
adequate funding, the District will begin the design process for upgrading and increasing
drainage systems.
Other Alternatives: During the assessment process, the District will identify drainage systems
that require interim maintenance such as removing debris, clearing perimeter drains and
verifying that the existing drains are working as well as possible.
Existing Planning Mechanisms through which Action will be Implemented: The District
Facilities Services and Maintenance departments will work in tandem to create a workable plan.
Responsible Office: Facility Services
Benefits (Losses Avoided): Reduction of District property and life safety
Potential Funding: FEMA Funding, TRUSD facility funding/CDE, any other grant or funding
programs available.
Schedule: The District is currently planning the improvements and will begin this portion of
work as soon as possible.
October 2012
Public Review Draft
M.45
3. Work with City/County/Water departments to create defensible spaces at sites where
nearby creeks are prone to flooding. Build-up earthen berms (off-site) to shed water
away from critically located schools.
Hazards Addressed: Flooding
Issue/Background Statement: Many of the district sites are located in the County of
Sacramento and are within the perimeter of various water districts and city and county agencies,
particularly Sacramento Regional Flood Control Agency, County of Sacramento and Rio
Linda/Elverta Water District. TRUSD intends to participate in any improvement discussions led
by the various agencies, to provide perimeter protection including levee rebuilding. This will be
a partnering effort to create a program of corrective and preventative measures for reducing flood
damage.
Other Alternatives: The District will build earthen berms and provide grading to shed overflow
water away from sites to adjacent storm drainage.
Existing Planning Mechanisms through which Action will be implemented: The Facilities
Services Department is in the assessment phases of determining which sites will be best suited
for this type of work
Benefits (Losses Avoided): Loss of property and personal safety.
Potential Funding:
available.
FEMA funding, local agency participation, other district sources, if
Schedule: ASAP
October 2012
Public Review Draft
M.46
4. Update the Emergency Preparedness Plan and the Emergency Operations Plan so
that in event of emergency or disastrous event, personnel and procedures are in
place and streamlined. This will include purchase of new equipment not reliant on
typical system power; including communications equipment, emergency housing and
supplies.
Hazards Addressed: All
Issue/Background Statement: The District is developing updated plans for emergency
preparedness that will include procedures for any emergency including safe routes, safe
gathering locations, battery back-up systems, generators at all sites, medical and first aid supplies
and equipment and emergency food and water supplies at sites and gathering locations. The
District will provide emergency operational binders materials to each site (site specific) and
provide training to staff. It is the District’s intention to work with the local fire agency to assist in
emergency training. Note: The Emergency Preparedness Plan and the Hazard Mitigation Plan
will be provided to the school board and community for review and information.
The
documents will also reside on the District website.
Other Alternatives: Educating district personnel to the potential hazards, both human and
other, and creating site specific emergency plans that are updated yearly.
Existing Planning Mechanisms through which Action will be Implemented: Risk
Management and Facility Services are working together to prepare current Emergency
Preparedness Plans. The two departments will jointly submit and present the documentation to
the School Board for approval and input.
Responsible Office: Risk Management and Facility Services
Cost Estimate: $50,000/Plan Preparation, $320,000/Supplies
Benefits (Losses Avoided): Life safety and avoidance of property destruction.
Potential Funding: District or other if grants are available.
Schedule: ASAP.
October 2012
Public Review Draft
M.47
5. Working with the Department of the State Architect (DSA) on Earthquake Retrofit Plan
on all sites.
Hazards Addressed: Earthquakes
Issue/Background Statement: There are a number of buildings within the TRUSD District
boundaries that were construction prior to 1970. Those building require earthquake retrofitting
or structural enhancement to make buildings safe during earthquake. It is the District’s intention
to assure that all buildings are safe for students, staff and visitors and to eliminate potentially
disastrous property loss should an earthquake occur. The Facility Services Department will work
closely with the Department of the State Architect to provide facility assessment and determine
best cause of action.
Other Alternatives: The Facility Services Department will undergo a facility assessment with
the use of a Structural Engineer to determine potentially dangerous buildings and areas, costs to
correct and schedule action. The Risk Management Department will verify adequate earthquake
insurance and verify that emergency plans and subsequent materials are in place should
earthquake occur.
Existing Planning Mechanisms through which Action will be implemented: The Facility
Services Department has been in touch with DSA to begin the process of Earthquake Retrofit.
Responsible Office: Facility Services and Risk Management.
Priority (H, M, L): Medium
Cost Estimate: Unknown to $10,000,000.00
Benefits (Losses Avoided): Property and life.
Potential Funding: FEMA, Department of the State Architect, California Department of
Education, , California Earthquake Authority, District Funds (if available) any available grant
programs.
Schedule: Begin planning process now, corrections within 5 years.
October 2012
Public Review Draft
M.48
6. Revise and update district-wide Storm Water Prevention Plan
Hazards Addressed: Drainage/Erosion/Flooding
Issue/Background Statement:
The District practices storm water prevention during
construction projects as mandated by the state and federal agencies. The District would like to
implement these same procedures in the Hazard Mitigation Plan and as a matter of policy to
deter debris from drainage systems, circumvent flooding to protect land and property.
Other Alternatives: N/A
Existing Planning Mechanisms through which Action will be implemented: The Facility
Services Department including Maintenance and Operations is determining the best way to
create a procedural manual and implement this policy.
Responsible Office: Facilities Services with Maintenance & Operations.
Cost Estimate: $150,000
Benefits (Losses Avoided): Property, environment and life safety.
Potential Funding: FEMA, any state or other agency with grant funds.
Schedule: In planning now, to implement no later than next season (2013-2014 winter)
October 2012
Public Review Draft
M.49
7. Create email notification system for families for emergency situations.
The District is creating and updating an Emergency
Preparedness Plan that will include a new emergency notification system for families of staff and
students. This emergency notification system will include the District Police Services
Department for assistance in emergency situations. The procedures provided in this plan will be
reviewed by the school board and implemented as policy.
Other Alternatives: Site specific emergency notification system.
Existing Planning Mechanisms through which Action will be implemented: The planning
will include the IT Department, Police Services and Facility Services who will jointly determine
the best course of action and system requirements. The District may include a public
announcement system to local media should the need arise.
Responsible Office: As noted above.
Benefits (Losses Avoided): Life Safety
Potential Funding: FEMA and other agencies that may assist in funding this program.
Schedule: To begin planning as soon as possible.
October 2012
Public Review Draft
M.50
8. Incorporate new rules for M&O department to keep drains clear, trees trimmed and
vegetation removed to minimize impact during heavy rains.
Hazards Addressed: Flooding, heavy rains
Issue/Background Statement: The District realizes the potential impact from clogged drains
and gutters that do not properly dispose of water, and the potential danger and harm of poorly
trimmed trees that may fall during winter storms. While the District attempts to minimize this
risk, it has been not been accomplished as a priority. It is the intention of the District to create
and implement new policy and procedures and to purchase the tools and equipment necessary to
minimize these concerns.
Other Alternatives: Prepare a recurring work order that stipulates drain and gutter cleaning
and vegetation removal as part of a program and on an annual basis.
Existing Planning Mechanisms through which Action will be Implemented: The
Maintenance and Operations Department, under the direction of the Facilities Services Director
Responsible Office: Facility Services with Grounds Department
Benefits (Losses Avoided): Destruction of property and life safety.
Potential Funding: Unsure, but may need funding assistance to purchase tools and equipment.
Schedule: As soon as schedule permits, but no later than next rainy season.
October 2012
Public Review Draft
M.51
9. Create defensible perimeter space – for fire areas. Trees trimmed and vegetation
removed to minimize impact during fire season.
Hazards Addressed: Wildfire
Issue/Background Statement: Various schools in the District are in less densely populated
areas where the threat of fire risk due to excessive vegetation is high. While the District attempts
to minimize this risk, it has been not been accomplished as a priority. It is the intention of the
District to create and implement new policy and procedures and to purchase the tools and
equipment necessary to minimize these concerns.
Other Alternatives: Prepare a recurring work order that stipulates drain proper tree trimming
and vegetation removal as part of a program and on an annual basis.
Existing Planning Mechanisms through which Action will be Implemented: The Grounds
section of the Facility Services Department is preparing a work plan and equipment list to
accomplish this goal.
Responsible Office: Facility Services and Grounds.
Priority (H, M, L): M
Benefits (Losses Avoided): Protection of life and property
Potential Funding: FEMA, TRUSD Deferred Maintenance funds for yearly
Schedule: Planning now
October 2012
Public Review Draft
M.52
10. Updating Evacuation Plans.
This District intends to create evacuation plans for the
protection and safety of students, staff, parents and visitors to all district properties. To that end,
the District will prepare updated maps of all school sites and administrative offices including, all
buildings and out-buildings, structures, roadways and equipment areas. The maps will clearly
indicate safe paths of travel for evacuation purposes, safe gathering areas (Plan A and Plan B);
will identify emergency supply locations, emergency communication equipment and any other
information relative to the safety of the district
Other Alternatives: All sites will independently update evacuation plans and submit to the
main district office for approval and record.
Existing Planning Mechanisms through which Action will be implemented: Facility
Services will begin updating existing site maps based on most recent capital improvements.
Once that is accomplished, Facility Services will work with each site and department to
coordinate best exit routes for safely transporting students and staff.
Benefits (Losses Avoided): Loss of life
Potential Funding: FEMA and/or any agency with available grant funding
Schedule: As soon as possible
October 2012
Public Review Draft
M.53
11. Updating District Policy for new Construction.
Issue/Background Statement: The District intends to create new policy for construction in
areas where flooding or other catastrophic events are possible. The new policy may include
natural resource protection, building on elevated foundations, retention tanks and/or detention
ponds for water run-off, and more complex drainage systems. The District will form a committee
to determine best possible building standards for flood zones.
Other Alternatives: The District shall make policy to avoid new construction in flood zones
whenever possible but will work closely with designers to implement strategy to minimize
damage.
Services will begin updating an addendum to District Standards to include sections for “building
in areas where flooding may be possible.
Cost Estimate: unknown to $150,000 for outside consulting efforts
Benefits (Losses Avoided): Loss of life and property
Potential Funding: FEMA, future bonds and district funds if applicable, other agency grants.
October 2012
Public Review Draft
M.54
12. Updating Evacuation Plans for Excessive Heat
Hazards Addressed: Excessive Heat
Issue/Background Statement: The District has had an unfortunate result of the sometimes
excessive heat in this area. A student, who was participating in physical education studies was
overcome by heat exhaustion and died. It has been the District’s priority to provide a full
assessment of environmentally controlled buildings and determine where improvements can be
made. As with many districts, TRUSD has a host of varied mechanical equipment problems and
failures. As a priority measure, the District is making repairs where possible and is searching for
financing to make further improvements.
Other Alternatives: The Facilities Services and Maintenance Departments are in the process of
upgrading mechanical equipment where needed most on a unit-by-unit basis. They will continue
this process as funding allows. The District will also work with energy management consultants
to determine other ways to achieve their goals.
Services and Maintenance will begin the process of equipment assessment on every school, and
identify each site and area by priority. The planners will begin searching for funding from the
state and other sources and will begin upgrades as funding becomes available.
Responsible Office: Facility Services and Maintenance
Cost Estimate: $10,000,000-$20,000,000 *Note: The district recently went out to bid for the
HVAC replacement at Grant High School (incident location). The total cost for this project was
over $3,000,000. Without funding, the district was only able to replace units in two areas. While
the estimated cost may seem high, with 52 schools in this district, most of which are very old, it
is likely that most sites will require some replacement equipment and reworking of systems.
Potential Funding: FEMA, CDE, SBA, OPSC and/or any available grants.
Schedule: Now
October 2012
Public Review Draft
M.55
13. Updating Evacuation Plans for Streambank Erosion
Hazards Addressed: Streambank Erosion
Issue/Background Statement: Many areas of the TRUSD district schools are located in the
apex of many small and large streams as well as two major rivers. While flooding is always a
concern, stream bank erosion can be a significant problem that the District currently has no
control over. As a priority measure, the District will work with county and other agencies to
fortify some of these areas and banks that are prone to erosion during heavy rains.
Other Alternatives: The Facilities Services Departments are in the process of working with
other agencies on natural resource flood protection for their sites. As a part of that process, the
District may request county flood control and other pertinent agencies to strengthen stream banks
within the perimeter of district properties.
Services and Maintenance will begin the process of a stream bank assessment on every school,
and identify each site and area by potential erosion priority. The planners will begin searching
for partners in the construction and/or strengthen of weak areas and will research funding from
Federal, State, County and any other sources to partner in this endeavor.
Responsible Office: Facility Services and Maintenance
Cost Estimate: $500,000 - $1,500,000
Benefits (Losses Avoided): Loss of life and property
Potential Funding: FEMA, CalEMA, California Department of Water Resources, Sacramento
County and other funding that may be available.
October 2012
Public Review Draft
M.56
14. Updating Evacuation Plans for Fog
Hazards Addressed: Fog
Issue/Background Statement: The District is situated on a thermal belt, as is much of the
central California area. During certain seasons, fog creates a low visibility situation where
driving becomes dangerous. The District intends to fortify safe travel, both vehicular and
pedestrian by utilizing low lighting in parking areas and at path of travel locations.
Other Alternatives:
students.
Utilize additional crossing guards on foggy days for the safe travel of
Services’ Energy Manager will prepare documentation as to the best type of lighting within
parameters of sustainability and energy management. Once determined, the Facilities planning
team will incorporate this data into district standards and when possible, change lighting at sites.
Cost Estimate: unknown to $150,000 for materials only
Potential Funding: Deferred Maintenance and any available grants.
Schedule: As time and funding allows.
October 2012
Public Review Draft
M.57
Appendix A Twin Rivers School District
Planning Process
Press Releases to the Public
October 2012
Public Review Draft
M.58
October 2012
Public Review Draft
M.59
October 2012
Public Review Draft
M.60
Mitigation Strategy Meeting
October 2012
Public Review Draft
M.61
October 2012
Public Review Draft
M.62
October 2012
Public Review Draft
M.63
October 2012
Public Review Draft
M.64
October 2012
Public Review Draft
M.65
October 2012
Public Review Draft
M.66
October 2012
Public Review Draft
M.67
October 2012
Public Review Draft
M.68
October 2012
Public Review Draft
M.69
October 2012
Public Review Draft
M.70
October 2012
Public Review Draft
M.71
October 2012
Public Review Draft
M.72
October 2012
Public Review Draft
M.73
October 2012
Public Review Draft
M.74
October 2012
Public Review Draft
M.75
October 2012
Public Review Draft
M.76
October 2012
Public Review Draft
M.77
Adoption Resolution
Note to Reviewers: When this plan has been reviewed and approved pending adoption by
FEMA Region IX, the adoption resolutions will be signed by the participating jurisdictions and
added to this appendix. A model resolution is provided below:
Resolution # ______
Adopting the Sacramento County Local Hazard Mitigation Plan
Whereas, the Twin Rivers School District recognizes the threat that natural hazards pose to
people and property within our community; and
Whereas, undertaking hazard mitigation actions will reduce the potential for harm to people and
property from future hazard occurrences; and
Whereas, the U.S. Congress passed the Disaster Mitigation Act of 2000 (“Disaster Mitigation
Act”) emphasizing the need for pre-disaster mitigation of potential hazards;
Whereas, the Disaster Mitigation Act made available hazard mitigation grants to state and local
governments;
Whereas, an adopted Local Hazard Mitigation Plan is required as a condition of future funding
for mitigation projects under multiple FEMA pre- and post-disaster mitigation grant programs;
and
Whereas, the Twin Rivers School District fully participated in the FEMA-prescribed mitigation
planning process to prepare this local hazard mitigation plan; and
Whereas, the California Office of Emergency Services and Federal Emergency Management
Agency, Region IX officials have reviewed the Sacramento County Local Hazard Mitigation
Plan and approved it contingent upon this official adoption of the participating governing body;
Whereas, the Twin Rivers School District desires to comply with the requirements of the
Disaster Mitigation Act and to augment its emergency planning efforts by formally adopting the
Sacramento County Local Hazard Mitigation Plan;
Whereas, adoption by the governing body for the Twin Rivers School District, demonstrates the
jurisdiction’s commitment to fulfilling the mitigation goals and objectives outlined in this Local
Hazard Mitigation Plan.
Whereas, adoption of this legitimacies the plan and authorizes responsible agencies to carry out
their responsibilities under the plan.
October 2012
Public Review Draft
M.78
Now, therefore, be it resolved, that the Twin Rivers School District adopts the Sacramento
County Local Hazard Mitigation Plan as an official plan; and
Be it further resolved, the Twin Rivers School District will submit this adoption resolution to
the California Office of Emergency Services and FEMA Region IX officials to enable the plan’s
final approval in accordance with the requirements of the Disaster Mitigation Act of 2000.
Passed:
(date)
Certifying Official
October 2012
Public Review Draft
M.79

Sacramento County Annex M Twin Rivers Unified School District

Transcription

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