Zone 1 - Riverside County Flood Control

201548
Zone 2
Report to the Zone Commissioners
for Calendar Year 2015
By Dusty Williams, General Manager-Chief Engineer
January 2016
GENERAL:
District-wide New Project Construction - Between July 2014 and fall 2015 the Riverside County
Flood Control and Water Conservation District will have issued Notices of Completion for eleven
projects totaling over $47 million dollars in construction cost (a figure that does not include the
substantial right of way acquisition and environmental mitigation costs associated with these projects).
By the end of Fiscal Year 2015/2016, the District is on track to complete an additional $43 million in
construction contracts.
Especially notable among the current projects:
• The contract to construct three miles of Romoland Line A channel and the Briggs Road
Detention Basin near Heritage High School for $27 million dollars is the largest the largest
single contract the District has ever issued.
• Eagle Canyon Dam not only put an end to this canyon's repeated damaging flash flooding, this
project also folded in $1.2 million in environmental clean-up (funded by the Cities of Palm
Springs and Cathedral City) at this long blighted location.
Additionally, the District is collaborating with the Cities of Corona, Norco, Moreno Valley, San Jacinto
and Riverside to deliver priority infrastructure. Utilizing District funding (provided through Boardapproved cooperative agreements) these cities are managing design and construction of significant
flood control projects.
With a significant El Niño posing a threat, the District is also working with the Cities of Moreno Valley
and Norco on smaller scale emergency projects to control sediment laden runoff.
EAGLE CANYON DAM
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Water Conservation:
District-wide Activities - Over the course of this past year, District staff met with regional water
agencies in an effort to understand the use and condition of local groundwater basins and to promote
joint stormwater recharge projects. The data collected from this effort fed the launch of our Stormwater
and Water Conservation Geodatabase system (rivco.permitrack.com) and 12 groundwater fact sheets
intended to further facilitate joint-use stormwater management planning and projects. The
Geodatabase system is also designed to assist the Cities, County and developers with addressing flood
control and National Pollutant Discharge Elimination System (NPDES) stormwater quality
requirements.
Coldwater and Mayhew Canyon Water Recharge Master Plan - On March 11, 2014, the District entered
into an agreement with the City of Corona to develop a groundwater recharge master plan for Coldwater
and Mayhew Canyons. The Coldwater and Mayhew Canyon Water Recharge Master Plan implements
recommendations of the Coldwater and Mayhew Groundwater Management Plan adopted by the City
in 2012. Phase I of the project has been initiated, which includes characterization of the hydrologic
groundwater basin and stormwater flows, preparation of engineered plans to re-establish the Glen Ivy
Road settlement basins and development of partnerships with the operators of the Coldwater and
Mayhew Canyon mining operations to promote stormwater recharge within their operations.
Corona Stagecoach Park Reclaimed Water Pipeline - The District entered into an agreement on August
8, 2013 to support the construction of a 10,300 lineal foot reclaimed waterline in River and Stagecoach
Roads. The project will provide an interconnection between the city of Corona, the city of Norco and
the Western Riverside County Regional Wastewater Authority facility in Eastvale. The project is
expected to save 2,464 acre-feet of water over a 20-year period. The District is contributing one-third
of the project cost (estimated at $1,030,000). Actual cost to District $830,620. The Project was
completed by the City of Corona in the summer of 2015.
District Facility Operations – The District is in the process of evaluating the operation of its existing
dams, debris basins and detention basins to determine if groundwater recharge potential can be
enhanced. Ongoing actions include excavating sinuous low flow paths for dry weather and small storm
flows, excavating small retention ponds within basin footprints and increased frequency of cleaning
and scarification of basin inverts.
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Santa Ana River, Norco Bluffs [Corps Project] (2-8-00100-00) - The Norco Streambank
Stabilization Project is a U.S. Army Corps of Engineers (Corps) project that consists of a soil
cement toe protection structure constructed to the 100-year flood level at the base of the bluff,
and a stable earthen buttress fill constructed to the top of the bluff. The bluff stabilization work,
which was completed in
2004, extends easterly from
the Interstate 15 bridge to
near Center Avenue. The
District is continuing to
work with the Corps on
wrapping up the project,
including completion of a
Project Operation and
Maintenance
Manual.
Once the Corps approves
the O&M Manual, the
project can be transferred to
the District for ownership,
operation and maintenance.
•
Santa Ana Canyon below Prado [Corps Project] (2-8-00105-00) - This line item covers four
separate but related projects: "Reach 9, Phase 2A", "Reach 9, Phase 2B", "Reach 9, BNSF Bridge
Protection Project" and "Inland Empire Brine Line Protection". All four projects are components
of the Corps' $2.2 billion Santa Ana River Mainstem Project (SARMP) and are necessary to
protect existing development and critical infrastructure against the maximum controlled flood
release from Prado Dam. The local cooperation agreement between the Corps and the local
sponsors (Riverside, San Bernardino and Orange Counties) calls for each County to be
responsible for obtaining the necessary right of way, utility relocation(s) and funding the local
cost share of the protection works and any other SARMP elements that lie within their respective
jurisdictions.
Phase 2A consists of approximately 5,700 lineal feet of slope protection adjacent to the Green
River Estates and Highway 91 just downstream of Highway 71. The District has completed its
acquisition of the necessary easements and fee interests from Riverside County and private lands.
Acquisition of the necessary easements and fee interests from Caltrans is ongoing. Construction
of Phase 2A was completed in Fiscal Year 2015/2016.
Phase 2B includes the installation of approximately 1,500 lineal feet of slope protection along the
91 Freeway adjacent to the Green River Golf Course and Green River Mobile Home Park.
Construction of this segment was completed in Fiscal Year 2014/2015.
District staff continues to work with the Corps to complete the transfer of the Phase 2A and Phase
2B facilities to the District for operation and maintenance. Funding in the District's Fiscal Year
2016/2017 Budget will be for ongoing project management.
The BNSF Bridge Protection Project consists of bridge and pier protection improvements for the
existing BNSF railroad bridge. Design by the Corps is underway. Funding in the District's Fiscal
Year 2016/2017 Budget will be for ongoing project management, right of way acquisition,
construction, utility relocations and environmental review and permitting.
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Santa Ana Canyon - Below Prado - Inland Empire Brine Line Protection (2-8-00105) - The
Inland Empire Brine Line Protection Project consists of the installation of approximately 2,500
lineal feet of sheet pile, with a maximum toe depth of 55 feet (15 feet below the scour depth),
secured by tiebacks spaced approximately every 10 feet. Construction will occur in two different
locations along the existing Santa Ana River (SAR) Trail. The proposed project will protect the
Inland Empire Brine Line from being exposed due to possible erosion caused by the Santa Ana
River and Aliso Creek.
This project was awarded to Blue Iron, Inc. in September 2015 for a total of $6,307,935.60.
Construction began in December 2015 and is estimated to be completed in June 2016.
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El Cerrito Channel Restoration (2-8-00110-90) - The proposed project is located in
unincorporated Riverside County near the city of Corona. This project involves improving
approximately 2,000 lineal feet of the existing El Cerrito Channel downstream of the intersection
of Ontario Avenue and El Cerrito Road in order to contain a 100-year flood.
A preliminary geotechnical investigation and an infiltration rate investigation were conducted in
2015 and found the project to be feasible. Preliminary designs and alternatives were drafted and
the preferred project alternative will be selected in 2016.
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201548
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North Norco Channel, Stage 11 (2-8-00140-11) - This project involves ultimate channel
improvements for the existing interim channel just upstream of the confluence with Line NA to
the terminus near Rose Court. Eight catch basins, two concrete aprons and two sand infiltration
basins have been designed to collect storm flows and improve the water quality of side drainage
along the channel. The District is currently working on 60% design plans and anticipates 90%
design plans will be completed by next year. FEMA processing will be necessary to revise the
currently mapped floodplain once the construction is completed.
North Norco Channel was originally going to be built under the same contract as Norco MDP
Lines N-2, NC and Lateral NC-1. However, extensive utility relocations are required for these
lines and would have significant delays on North Norco Channel construction. The lines will
remain in the budget,
however, will be
separated for the
channel project and
will be built at a later
date.
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Norco MDP Lines N-2, NC, and Lateral NC-1 (2-8-00144-01) - This project involves the
construction of two lines and one lateral that will convey flows into the ultimate North Norco
Channel design. These lines and lateral were originally budgeted to be constructed
simultaneously with North Norco Channel, Stage 11. However, the lines and laterals have been
designated as a project separate from
the channel improvements due to the
challenge posed by significant utility
conflicts. Lines N-2 and NC, and
Lateral NC-1 will remain in the
budget and be designed after the
North Norco Channel system is
complete. FEMA processing will be
necessary to revise the currently
mapped floodplain once the lines and
lateral construction are complete.
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North Norco Channel - Line NB, Stage 3 (2-0-00145-03) - The proposed project is located
within the city of Norco, north of Fourth Street. A majority of the Line NB system has already
been built for the ultimate 100-year flow rate condition. However, a portion between Interstate
15 and Valley View Avenue is currently an interim unlined trapezoidal channel that does not yet
have the capacity to convey the full ultimate condition flow rates. This project will improve the
approximate 1,600 feet of interim channel to convey the 100-year runoff, thus, completing the
Line NB system. The District is currently working on drafting the 30% plans and estimates
construction of the project in 2017.
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South Norco Channel, Stage 6, Norco MDP Line S-1 and Norco MDP Line S-5 (2-8-015006) - This project will include the construction of three storm drain facilities totaling two miles
in length in the city of Norco. The project will convey runoff from an approximate 470-acre
watershed northeasterly of Second Street and Corona Avenue. CValdo Corporation is the design
engineering consultant for this project.
South Norco Channel, Stage
6, shown in blue, is a 100year facility. It includes
approximately 3,200 feet of
open channel (trapezoidal
channel
with
concrete
sideslopes with a cobble
lined
bottom)
and
approximately 700 feet of
underground
reinforced
concrete box (RCB). The
open channel extends from
the intersection of Second
Street and Corona Avenue,
northeasterly to Temescal
Avenue, transitions to an
RCB through the campus of
Norco High School then
back to an open channel
ending at Norco Intermediate
School. The total length of
this
segment
including
laterals is 4,100 feet.
Line S-5, shown in pink, is a
10-year underground storm drain. This line extends from the upstream end of South Norco
Channel, Stage 6 along the southerly and easterly boundaries of the Norco Intermediate School,
along Hillside Lane (a private street) continuing north within Hillside Avenue. The total length
of Line S-5 including laterals is 3,500 feet. Sizes range from 24-inch to 48-inch diameter RCP;
there is also a short reach of RCB.
Line S-1, shown in purple, is a 10-year underground storm drain extending from the South Norco
Channel, Stage 6 crossing at Third Street. The line continues easterly within Third Street to
Hillside Avenue. Line S-1 sizes range from 18-inch to 48-inch diameter RCP. The total length
of this line including laterals is 2,700 feet.
Construction drawings including pavement rehabilitation plans are complete. The legal
descriptions required for the permanent storm drain easements and temporary construction
easements have been prepared and negotiations with the property owners began this summer.
Currently 9 of 15 easements have been obtained. The public comment for the CEQA Initial Study
and Mitigated Negative Declaration (MND) was completed in July. Permit applications will be
made by the end of this year. It is anticipated that the Board of Supervisors will adopt the MND
and approve the project on January 5, 2016.
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Currently, the District is working with the Western Municipal Water District (WMWD) to
establish a cost share agreement for the design and construction of a 30" waterline the relocation.
Remaining items include a cooperative agreement with the City of Norco and the preparation of
project-specific construction specifications.
•
Norco MDP Line NA-1, Stage 2 and Line NA-1A (2-0-00155-02 & 2-0-00156) - Norco Master
Drainage Plan Line NA-1, Stage 2 and Line NA-1A are proposed 10-year facilities which will
serve to protect the neighborhoods in the vicinity of Crestview Drive. The limits of Line NA-1,
Stage 2 extend from the terminus of Line NA-1, Stage 1 northerly along Crestview Drive to a
point approximately 330 lineal feet north of Mount Rushmore Drive. The limits of Line NA-1A
will begin from the intersection of Crestview Drive and Mount Rushmore Drive and extend
easterly along Mount Rushmore Drive for approximately 950 feet.
Design of the MDP line will require updates to the hydrology to account for changes in drainage
patterns resulting from the construction of a housing tract located due east from the proposed
project site. The design will also address the debris potential from the surrounding hills. Initial
analysis suggests multiple debris basins may be required to mitigate against the heavy debris flow
hazard during moderate storm events.
Project complexity is increased by the construction of Line Z, per City Drawing No. D-0904A,
which ties into the District's existing Line NA-1, Stage 1 and extends northerly for approximately
525 lineal feet. Initial review of Line Z plans reveals that it is an undersized system per the Norco
MDP, possibly designed only for the interim condition rather than the ultimate MDP condition.
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The mapping and hydrology study for this project have been completed. We are still waiting on
the Army Corps of Engineers' jurisdictional determination for the Waters of the U.S. Current
design tasks include the Preliminary Design Report and the design of an interim project to
construct a debris basin prior to the construction of Lines NA-1, Stage 2 and NA-1A.
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Mockingbird Canyon (2-8-00180-00) - The District has identified parcels along and adjacent to
Mockingbird Canyon Wash that are subject to flood hazard and that would be ideal for acquisition
as part of a non-structural flood hazard mitigation program funded by mitigation fees paid by new
development. Acquisition of properties between Van Buren Boulevard and Pennington Place
from willing sellers when opportunities present is ongoing.
•
Mockingbird Canyon Restoration (2-0-00002-00) (This project overlaps Zones 1 and 2 and is
funded by both zones. Listed out of order for clarity sake.) - Mockingbird Canyon Wash has been
severely damaged during large storm events over the past four decades, most recently in
December 2010. Damage has been significant, affecting public and private drainage facilities as
well as roads; repairs have been costly. A portion of this damage may be attributed to various
improvements and encroachments that occurred as the area has developed.
The best long-term solution appears to
be the streambank stabilization of
Mockingbird Canyon Wash.
The
District hired JE Fuller Hydrology and
Geomorphology, Inc. to study the
wash and identify key locations where
grade stabilization structures would be
needed. JE Fuller has completed the
study and has developed a proposed
conceptual
level
management/
remediation plan to stabilize the wash.
.
MOCKINGBIRD CANYON ROAD
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Corona East Grand Boulevard Storm Drain Main Street Storm Drain, Stage 1 (2-8-0021001) - This facility consists of an underground storm
drain proposed in East Grand Boulevard from
about 3rd Street and extending south to 7th Street in
the city of Corona. The District and the City
entered into a cost share agreement with the City
to design-build the project and the District to fund
design and construction. The agreement was
executed in March 2011. The project is on a hold
until such time when the design of the downstream
reach is complete.
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201548
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Corona Drains Line 52 (2-8-00350-01) - This project was originally planned as an underground
storm drain in the city of Corona, extending from East Grand Boulevard north in Joy Street to
Temescal Creek Channel. Design began on this project in 2003, at which time it was discovered
during a field check of the preliminary drawings that a recently installed Edison conduit in Joy
Street overlapped the most viable alignment for the storm drain. The street is heavily congested
with major utilities and the design required a special underground box design to miss many of the
major utilities in Joy Street. The City of Corona is taking the lead on design and construction of
this project; therefore, the District executed a "design-build" cost sharing agreement with the City
in 2010 and further amended the agreement in 2012. Additional design changes and coordination
with the design-build of the SR-91 expansion has required additional utility and street work
coordination that were not anticipated. The City's consultant will be working on 100% design
plans and is anticipated to complete in January 2016. The District is in the process of processing
the second amendment for the additional utility and street design work efforts. The project is
tentatively scheduled to be advertised in early 2016.
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Temescal Creek - Foster Road Storm Drain, Stage 1 (2-8-00493-01) - The proposed project is
located in unincorporated Riverside County south of the city of Corona. This project is an
underground storm drain in Foster Road extending from Temescal Creek approximately 1,700
lineal feet to an existing culvert traversing Interstate 15.
This project was awarded to Spiess Construction Company, Inc. in August 2014 for a total of
$1,661,553.25. Construction began in January 2015 and was completed in September 2015.
•
Coldwater Canyon Wash - (2-8-00505-01) - The District is evaluating several alternatives that
would provide flood protection to Temescal Canyon Road and several properties located along
the wash. The study limits are from Glen Ivy Road to Interstate 15. The facilities being
considered include underground storm drains sized to convey flows for various storm events
(2 - year, 10-year, 50-year and 100-year) and open channels, either earthen with rock lined
sideslopes or concrete. The project is also considering groundwater recharge opportunities and
is considering a basin at the northeast corner of Glen Ivy Road and Temescal Canyon Road.
District staff will be discussing alternatives with Supervisor Jeffries' District in January 2016.
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City of Norco, Minor Drains Design-Build Program - In February 2012, the District entered
into a funding agreement with the City of Norco to fund a number of small but important drainage
projects. The City has constructed seven of the eight projects (the last one is waiting on the
District's South Norco Channel, Stage 6 project). The City will operate and maintain these storm
drains. The total District cost is $1,946,000.00.
•
Norco MDP Lines N-7, S-5A, S-6, NB-2, N-1A, N-1B and N-1E, Eastvale MDP Line E-3
(2-0-00132, 2-0-00162, 2-0-00166, 2-0-00167, 2-0-00168, 2-0-00327) (i)
Norco MDP Line N-7 ("Line N-7") - a storm drain system from Valley View Avenue
westerly approximately 200 lineal feet to an existing storm drain system;
(ii)
Norco MDP Lateral S-5A ("Lateral S-5A") - a storm drain system from Kingman Drive
southwesterly for approximately 250 lineal feet to Hillside Lane;
(iii)
Norco MDP Line S-6 ("Line S-6") - a storm drain system from Temescal Avenue north
of 2nd Street (approximately at Norco High School) westerly approximately 600 lineal feet
to the existing South Norco Channel; construction of this project is waiting on the
District’s ongoing South Norco Channel Stage 6 project.
(iv)
Norco MDP Line NB-2 ("Line NB-2") - approximately 750 lineal feet of storm drain
system located in Temescal Avenue from south of Wrangler Way to the District's existing
Norco MDP Line NB;
(v)
Norco MDP Line N-1A ("Line N-1A") - approximately 1,200 lineal feet of storm drain
system located in Center Avenue south of the intersection of Center Avenue and 7th Street;
(vi)
Norco MDP Line N-IB ("Line N-1B") - approximately 1,685 lineal feet of storm drain
system located in Hillside Avenue south of the intersection of Hillside Avenue and 7th
Street;
(vii)
Norco MDP Line N-lE ("Line N-1E") - approximately 450 lineal feet of storm drain
system located in Center Avenue from north of 7th Street; and
(viii) Eastvale MDP Line E-3 ("Line E-3") - approximately 1,500 lineal feet of storm drain
system in Hamner Avenue from north of Citrus Street.
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