Lathrop City Council
January 12, 2026

Mossdale Urban Flood Risk
Reduction Project Update
January 12th, 2026
City of Lathrop City Council Meeting
ITEM 2.2
Mossdale UFRR Project
2 Draft EIR Public Release,
Approach, Availability
Current Status - Mossdale UFRR
Dryland Levee Status and Schedule
Questions and Discussion
Mossdale UFRR Project
Overview
• Multi-phase flood risk reduction project for the
Mossdale Tract area
• Designed to achieve 200-year Urban Level of
Protection (ULOP)
Includes a combination of:
• Levee improvements and extensions
• Supporting flood risk management infrastructure
• Associated multi-benefit components
• Implemented by the San Joaquin Area Flood
Control Agency (SJAFCA) in partnership with the
California Department of Water Resources (DWR)
3 CEQA Draft Environmental Impact Report
Public Release
4 Notice of
Preparation Draft
EIR
Public Review
Period
April 22 - May 23,
2022
AB 52 (2014) (Tribal
/ Cultural
Resources)
Issuance of AB 52
letters
October 2025
Public Draft EIR
Public Review
Period - 45 days
December 19, 2025
– February 2, 2026
Public Draft EIR
Availability
SJAFCA website
and physical copies
at local agencies
Public Meeting
January 13, 2026
Virtual
CEQA Draft Environmental Impact Report
Scope and Approach
5 • Draft EIR evaluates the physical environmental effects that have the potential to be affected by implementation of the proposed project for each resource topic
• Project-level analysis of the flood risk reduction components and multi-benefit ecosystem restoration Sites 13, 14, and 16
• Program-level analysis of additional multi-benefit restoration sites and the recreation components (other multi-benefit components)
• Preliminary locations identified in the Mossdale Tract Area UFRR Feasibility Study (2021) • Further refinement needed for specific locations and design • As the design and locations are determined, potential environmental impacts associated with their construction and operation and maintenance will be subject to subsequent environmental review documents
EIR Availability
6 The Draft EIR is available for review at SJAFCA’s office during normal business hours at:
2800 W March Lane, Suite 200
Stockton, CA, 95219.
• The Draft EIR is also available on SJAFCA website:
https://www.sjafca.org/projects/mossdale-tract
• The State Clearinghouse
https://ceqanet.lci.ca.gov/Project/2022040471
• Published in the Stockton Record and posted on Nextdoor and Facebook
Mossdale UFRR Dryland Levee – Current Status
Advancing activities to
support Project Design
and Real Estate
• Landowner
Coordination
• Surveys
• Geotechnical
Investigations
7 Dryland Levee Extension
8 • Reconstruct and improve a segment of the
existing DLL
• Reconstruct pipe penetrations crossing the
existing DLL
• Tie-in new construction to the existing DLL
• Construct approximately 3 miles of new
levee eastward to Tinnin Road
• Identify and utilize borrow sites for levee
remediation or construction
• Develop design plans for habitat
restoration at Sites 13, 14 and 16
• Identify and utilize borrow sites for levee
remediation or construction
• Relocate, remove, or reconstruct utilities
and other levee encroachments
• Design roadway re-alignments and regrading for major arterials and collectors • Implement mitigation actions associated
with levee improvements
Dryland Levee Project Schedule
9 Questions &
Discussion
Ryan Curry
Senior Project Manager
[email protected]
https://www.sjafca.org/