1SJAFCA MISSION STATEMENT ‐ Reduce and Manage the Region’s Flood Risk
LOWER SAN JOAQUIN RIVER PROJECT
TEN MILE SLOUGH LEVEE IMPROVEMENTS
Brookside Neighborhood Segment Briefing
STOCKTON CITY COUNCIL
AGENDA ITEM 15.1
March 1, 2022
Briefing
Agenda
SJAFCA Mission & Organization
On-going Flood Protection Projects
Lower San Joaquin River
Today’s Focus
Lower San Joaquin River Project (LSJR)
Phase I
First Increment
Brookside Neighborhood Along Ten Mile
Slough
2 Joint Powers Authority formed in May 1995
City of Stockton, San Joaquin County and the San Joaquin County Flood Control & Water Conservation District
Address flood protection for the City of Stockton & surrounding County area
Expanded to include Cities of Lathrop & Manteca in 2018 Board includes Directors (9) from member agencies and the public 3 Who We Are
Mission
Reduce and Manage the Region’s Flood Risk
(Cities of Stockton, Lathrop and Manteca and
some adjacent unincorporated County areas)
4 SJAFCA
Boundary
5 6
Yes, it does flood here!
Lower San Joaquin Project
Taking steps now to save lives,
livelihood and the environment
Stockton Diverting Canal, 1958
7Reduce and Manage the Region’s Flood Risk
LSJR Project Partners
SJAFCA & Dept. of Water Resources & Central Valley Flood Protection Board Roles:
Cost Share Project Costs
Real Estate Property Acquisitions
Utilities Relocations
Environmental compliance (CEQA)
Public Outreach
8Reduce and Manage the Region’s Flood Risk
LSJR Project Partners
United States Army Corps of Engineers Federal Partner Federal California Department of Water Resources
State Partner Non ‐ Federal
Sponsors
(NFS)
Central Valley Flood Protection Board
San Joaquin Area Flood Control Agency Local Partner
Purpose: flood risk reduction; estimated 122k
people and $28B damages
Over 23 miles of levee cutoff walls + levee raises,
new setback, geometry improvements, erosion
protection, new levees, and 2 closure structures
(incl. Smith Canal Gate)
San Joaquin River Basin, LSJR Feasibility Report,
EIS/EIR completed in 2018
$17 M dollar contract awarded to Kleinfelder
Inc. for the entire LSJR Geotech Explorations
Construction contract award of Phase 1 is in year
2023 with estimated cost over $20M
Estimated construction completion of phase 1 of
the LSJR project is end of October 2023
Est. completion of all phases of LSJR project is
2030
9Reduce and Manage the Region’s Flood Risk
Lower San Joaquin River Project –P h a s e I
Ten Mile Slough Segment: Status Update
100% Design
March 2022
Environmental Phase
A. NEPA April 2022
B. Draft CEQA SEIR
(March 2022)
Transplant Elderberry
Shrubs & Remove
Trees
Nov. 2022
Start & Complete
Construction 2023
Lower San Joaquin River Project –P h a s e I
Ten Mile Slough
Estimated Project Costs
Design Cost: $6,346,000
Design Cost Share: USACE-Federal ($4,125,000)
Non-Federal Sponsor –
State & Local ($2,221,000)
Construction Cost: $20M
Construction Cost Share Agreement:
Federal (65%)
State (24.5%)
Local (10.5%)
11Reduce and Manage the Region’s Flood Risk
Lower San Joaquin River Project – Phase I
Ten Mile Slough Segment: Status Update
12 Ten Mile Slough (TS_30_L)
Currently Under Design March 2022
Design Completion
July 2022
Construction
Contract Ready to
Advertise
Sept 2022
Construction
Contract Awarded
Oct 2023
Construction End
Features found in the Feasibility Study
Cutoff wall
Erosion protection
Reduce and Manage the Region’s Flood Risk
Project & Community Impacts
Traffic impacts on March Lane west of I‐5
Estimated 120 trucks trips (approximately 25 to 30 trucks) per day between borrow and project sites
Noise impacts due to construction equipment (Backhoe, Concrete pump, Trucks, Dozer)
Dust impacts due to excavations and construction traffic Construction Work hours are (7 a.m.‐7 p.m.). This was coordinated with City departments
Truck Haul Hours (8 a.m.‐4 p.m.)
Construction window –2 years (2022 & 2023)
13Reduce and Manage the Region’s Flood Risk
RD 2119/2115/1608 Fourteen Mile Slough
14 June 2022 ‐ Geotech &
Pre‐Design Complete
June 2023 ‐ Design
Complete
Oct 2024 ‐
Construction Contract
Ready to Advertise
Mar 2025 ‐
Construction Contract
Issued
Nov 2025 ‐
Construction End
Shima Tract
Brookside
Reduce and Manage the Region’s Flood Risk
Conclusion
Insight into role of your SJAFCA in protecting lives, livelihoods, and environment
Mindful of the impacts of flood protection improvements – a necessary public safety infrastructure
Working with your staff to address those impacts
Hold public meetings to meet and address concerns by our neighbors 15Reduce and Manage the Region’s Flood Risk
16 QUESTIONS?
SJAFCA MISSION STATEMENT ‐ Reduce and Manage the Region’s Flood Risk