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Project: Marshall Ranch Flow Enhancement Design

Description: This project involves 100% engineering design and permitting for a large-scale flow enhancement project that will supply up to 0.5 cubic feet per second of cool and clean water to Redwood Creek mainstem during the five-month dry season. The goal is to have a shovel-ready implementation project by the summer of 2019 so that the project team can apply for implementation funds through the Wildlife Conservation Board’s Streamflow Enhancement Program (Prop 1 funding source). The project’s potential water supply benefits would generate approximately fifty-million gallons of water storage for enhanced instream flows for salmonids. The project proposes to design a large-scale flow enhancement project through collaborative process involving the following steps: 1) convening of a TAC, 2) geotechnical investigations, 3) hydrologic analyses, 4) conceptual design and alternative analyses, 5) 65% and 100% Design Plans, Basis of Design Reports, and Specifications, 6) Permitting and appropriative water right, 7) Outreach and education and 8) Pre-project flow monitoring. This integrated approach will allow the project team and stakeholders to develop a flow enhancement project that provides substantial measurable flow increases along a 5.5 mile segment of Redwood Creek that is known to be extremely flow-impaired.

Reference Number: 36402018008

Implemented By: Salmon Restoration Federation

Objective: Enhanced stream flow

Type: Water Management

Total Cost: $293,980.04

Project Status: Project Implementation

On Time?: Yes    Within Scope?: Yes    Within Budget?: Yes

Estimated Completion: 9/30/2020    Actual Completion:

Associated Counties: Humboldt

Project Benefits a Disadvantaged Community (or SDAC): Yes

Contribution SourcesContribution DateContribution Amount
Private Contribution3/22/2018$36,517.00
Prop. 1, Stream Flow Enhancement3/22/2018$257,463.04

Project MetricMetric TopicQuantityUnit
Water ManagementConveyance  
Water ManagementWater Storage -- Surface  

Water Action Plan Target

Protect and Restore Important EcosystemsAction Description
Manage and Prepare for Dry PeriodsAction Description
Expand Water Storage Capacity and Improve Groundwater ManagementAction Description


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