Mattole Storage and Forbearance 2017-2020

Salmonid Habitat Restoration and Acquisition

Instream Flow
Project ID725246
Recovery DomainsN. CA - S. OR and CA Coast
Start Date06/26/2017
End Date04/11/2021
Last Edited11/17/2021
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The project included:

1) Installation of 50,000 gallons of domestic water storage

2) Forbearance Agreement with participating landowner that restricts water diversions in the driest months

3) Protect anadromous species from injury by properly screening diversion associated with the


The project installed storage tanks on one property referred to as the ?Richter? property. A Forbearance Agreement was implemented on this property which had existing diversions operating under legal water rights but with no seasonal restrictions or bypass flow requirements. The project imposes a ?no-pump? season, along with seasonal pumping restrictions in spring and fall?including bypass flow requirements and assigned pumping days. Additionally the project upgraded the existing submersible pumps with fish screens

that comply with CDFW criteria.

Project Benefit    

Increased summer stream flows will improve water quantity/quantity and increase cover for Coho.


Metric Completed Originally

Funding Details

In-Kind Other$43,965
Report Total:$131,125

Project Map



  • Worksite Identifier: 7211378
  • Start Date:
  • End Date:
Area Description

Location Information

  • Basin: Northern California Coastal
  • Subbasin:
  • Watershed:
  • Subwatershed:
  • State: California
  • Recovery Domain: N. CA - S. OR and CA Coast
  • Latitude: 40.0539
  • Longitude: -123.9614


  • California Coastal Chinook Salmon ESU
  • California Coastal Chinook Salmon ESU
  • Southern Oregon/Northern California Coast Coho Salmon ESU
  • Southern Oregon/Northern California Coast Coho Salmon ESU
  • Northern California Steelhead DPS
  • Northern California Steelhead DPS




  • C.0 Salmonid Habitat Restoration and AcquisitionY (Y/N)
    •      . . C.0.a Habitat restoration and acquisition funding 138,225.00
    •      . . C.0.b Length of stream treated/protected 1.60
    •      . . C.0.c
      Project identified in a Plan or Watershed Assessment
      Mattole River and Range Partnership (MRRP), 2009, Mattole Integrated Coastal Management Plan: Foresight 2020, Mattole Restoration Council, Petrolia, CA
    •      . . C.0.d.1 Project Monitoring (LOV)
    •      . . C.0.d.2 Monitoring Location (LOV)
    •      . . C.3 Instream Flow ProjectY (Y/N)
      •      . . . . C.3.a Instream Flow Funding 138,225.00
      •      . . . . C.3.b Length of stream 'protected' for adequate flow 1.60
      •      . . . . C.3.c Change in water flow.02 (cfs)
      •      . . . . C.3.g.1 Maintaining adequate flow or reducing withdrawalsY (Y/N)
        •      . . . . . . C.3.g.2 cfs (cubic feet per second) of water conserved per year.02 (cfs)