Stormwater Master Plan OverviewFinalized January 2023
Council Water Committee
April 10, 2025
Agenda Item No. 25-0436
Stormwater Master Plan Purpose
Identify and evaluate flooding concerns
Develop CIP projects to alleviate flooding
Support future development
Focus Areas and Priorities
Focus on analysis of City’s stormwater infrastructure and 10-yr, 24-hr design storm event
Existing flooding concerns are distributed throughout the City New development often creates or exacerbates flooding concerns 12 improvement concepts developed with costs ranging from $5-75M Improvements focused on larger flooding issues but could be augmented by smaller-scale projects Key Findings
Sample Proposed Improvement
Proposed Improvement Summary
Project
Cost
Priority
Boggs Tract
$17,144,585
High
Bonnie Brook
$11,547,232
High
Hwy 4 and San Joaquin
$24,902,729
High
Walker Turnpike Alt 1 *
$46,204,468
High
Walker Turnpike Alt 2 + Eighth St and San Joaquin *
$75,142,267
High
Bianchi and Calaveras
$30,682,180
Medium
Duck Creek
$12,061,203
Medium
Legion Park and Smith Canal
$50,864,178
Medium
Deep Water
$10,229,853
Low
Little Johns
$4,552,126
Low
Mormon Slough
$27,524,026
Low
Sutter and Calaveras River
$13,710,877
Low
West Lane and Calaveras River
$6,517,147
Low
* Denoted projects are alternatives and would not both be constructed
Financial Analysis Summary
Expenditures expected to increase at a rate higher than revenues for operational costs alone Multiple funding mechanisms would be necessary to support ongoing operations and any future capital investments Implementation of a reliable and predictable revenue stream is recommended for long-term operation expenditures and capital costs
Conclusions
Stormwater needs are substantial
Addressing stormwater needs will require a new approach and funding mechanisms Collaboration with stakeholders needed to consider downstream impacts and discharge limitations Developed model expected to serve as a valuable tool for future projects and development decisions