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File #: 2020-0818   
Type: Consent Calendar Item Status: Agenda Ready
File created: 8/7/2020 In control: Sonoma County Water Agency
On agenda: 9/15/2020 Final action:
Title: Watershed Plan & Environmental Assessment for Central Sonoma Watershed Project
Department or Agency Name(s): Sonoma County Water Agency
Attachments: 1. Summary Report, 2. Resolution, 3. Agreement, 4. Map
Date Action ByActionResultAction DetailsMeeting DetailsVideo
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To: Board of Directors, Sonoma County Water Agency

Department or Agency Name(s): Sonoma County Water Agency

Staff Name and Phone Number: Susan Haydon  (707) 547-1937

Vote Requirement: 4/5th

Supervisorial District(s): All

 

Title:

Title

Watershed Plan & Environmental Assessment for Central Sonoma Watershed Project

End

 

Recommended Action:

Recommended action

A)                     Authorize Sonoma County Water Agency’s General Manager to execute a Cooperative Agreement with the United States Department of Agriculture Natural Resources Conservation Service in the amount of $1,200,000 in federal funding received to prepare a Watershed Plan and Environmental Assessment for the upgrade and rehabilitation of the Central Sonoma Watershed Project.  

B)                     Adopt a resolution authorizing adjustments to the Board Recommended Budget for Fiscal Year 2020-2021 for the Flood Control Zone 1A Fund, in the amount of $82,000 for the Watershed Plan & Environmental Assessment for Central Sonoma Watershed Project. (4/5th Vote Required)

end

 

Executive Summary:

USDA Natural Resources Conservation Service awarded funding to Sonoma Water in the amount of $1,200,000 to prepare a Watershed Plan and Environmental Assessment addressing future upgrades and rehabilitation of the Central Sonoma Watershed Project’s flood management facilities.  The Watershed Plan and Environmental Assessment will be prepared in accordance with federal program guidance and National Environmental Policy Act (Act).

 

Discussion:

The Central Sonoma Watershed (CSW) Project is a cooperative flood management project initiated in 1958 with federal sponsor USDA Natural Resources Conservation Service (NRCS) (formerly Soil Conservation Service), Sonoma Water (formerly Sonoma County Flood Control & Water Conservation District) and Sonoma Resource Conservation District (formerly Santa Rosa Soil Conservation District).  This federal Small Watershed Project, developed under Public Law-566, encompasses a 163,000 acre watershed within the greater Russian River Watershed which includes all of Santa Rosa Creek, its headwaters and its tributary streams.  The CSW Project suite of facilities comprise 4 flood detention reservoirs (Middle Fork Brush Creek Reservoir, Piner Creek Reservoir, Spring Lake, and Mantazas Creek Reservoir), diversion structures on Santa Rosa Creek and Spring Creek to divert flows into Spring Lake, and a series of channel improvements and stormwater conveyance facilities (open channels, culverts, and Vortex Tube).  This flood management system, constructed in the 1960’s and early 1970’s, has long provided critical flood protection for the City of Santa Rosa.

 

The project has exceeded its intended 50-year design life and is in need of rehabilitation and upgrade to reduce risk of seismic events, flood, and other hazards due to increased urbanization, climate change and increased frequency of peak storms, wildfire severity, and compliance with the Endangered Species Act pursuant to a Federal Biological Opinion.  The planning effort will identify vulnerabilities and evaluate feasible alternatives for modernization and rehabilitation of the CSW Project to serve the community’s current and future needs.

 

A hydrologic and hydraulic model exists to support these efforts, developed by Sonoma Water in partnership with City of Santa Rosa.  The surface water model will assist in informing flood management planning and future conceptual designs and serves as a foundation to the planning effort.  The CSW Watershed Plan (Plan) and Environmental Assessment (EA) will be developed in accordance with the USDA NRCS National Watershed Program Manual and National Watershed Program Handbook.  The planning effort will include a broad evaluation of existing conditions and setting, technical studies, surveys, and an economic evaluation.  The Plan will assess vulnerabilities and determine feasible alternatives, with identification of a preferred alternative and conceptual design(s).   Sonoma Water will engage partners, stakeholders and the public to review alternatives and participate in the public review of the Plan & EA compliant with the National Environmental Policy Act and the California Environmental Quality Act.   Final adoption of the Watershed Plan will require approval by Resolution of the Sonoma Water Board of Directors.

 

Prior Board Actions:

None.

 

Fiscal Summary

 Expenditures

FY 20-21 Adopted

FY21-22 Projected

FY 22-23 Projected

Budgeted Expenses

$550,000

$768,000

 

Additional Appropriation Requested

$82,000

 

 

Total Expenditures

$632,000

$768,000

 

Funding Sources

 

 

 

General Fund/WA GF

 

 

 

State/Federal

$566,000

$634,000

 

Fees/Other

$66,000

$134,000

 

Use of Fund Balance

 

 

 

Contingencies

 

 

 

Total Sources

$632,000

$768,000

 

 

Narrative Explanation of Fiscal Impacts:

Estimated consultant and Sonoma Water staff costs, for the Watershed Plan & Environmental Assessment for Central Sonoma Watershed Project, total $1,400,000. Budgeted amount of $550,000 is available from FY 2020/2021 appropriations for the Flood Control Zone 1A Fund. Additional appropriations of $82,000 are required to process this expense in year one. With Board approval of the attached resolution, appropriations of $82,000 will be made in the Flood Control Zone 1A Fund.

 

Offsetting revenue in the amount of $1,200,000 will be coming from USDA Natural Resources Conservation Service (as federal sponsor), $566,000 in year one and $634,000 in year two. Remaining costs of $200,000, $66,000 in year one and $134,000 in year two, will be from the Flood Control Zone 1A Fund, which is funded by property taxes.

 

Future appropriations will be budgeted in FY 2021/2022.

 

Staffing Impacts:

 

 

 

Position Title (Payroll Classification)

Monthly Salary Range (A-I Step)

Additions (Number)

Deletions (Number)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Narrative Explanation of Staffing Impacts (If Required):

N/A

 

Attachments:

Resolution

USDA Natural Resources Conservation Service Cooperative Agreement

Location Map of PL-566 Central Sonoma Watershed

 

Related Items “On File” with the Clerk of the Board:

None