Parks Creek Flow Enhancement and Fish Passage Project

Parks Creek Flow Enhancement and Fish Passage Project

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Project Goal:

Enhance flows and restore critical spawning and rearing habitat for salmon and steelhead throughout the watershed.

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Project Stages

Conceptual Design

Permitting Phase



Post-Restoration Monitoring

Project Funders




Fish Affected:

Project Description

Parks Creek is a critical tributary to the Shasta River in the Mid-Klamath Basin. The Shasta River was historically one of the most productive salmon streams in California. Groundwater from cold, nutrient-rich springs provided nearly ideal aquatic habitat conditions that supported large Chinook and coho salmon populations. But more than a century of aquatic and riparian habitat degradation along the Shasta River and its tributaries—including Parks Creek—has resulted in dramatic declines in wild salmon populations.

CalTrout’s Parks Creek Flow Enhancement and Fish Passage Project is working with the Cardoza Ranch to enhance flows and restore critical spawning and rearing habitat for salmon and steelhead throughout the watershed. The project is essential for recovering salmon populations throughout the Mid-Klamath Basin because degraded flows, water quality, and habitat conditions continue to limit spawning and rearing in vital cold-water tributary streams.

With cooperation from the Cardoza Ranch, the Project will result in enhanced flow of a minimum of 2.98 cubic feet per second (cfs) of water instream by moving the point of diversion 2.8 miles downstream and will also keep water instream due to increased irrigation efficiency by using California Public Resources Code § 1707. Additionally, the Project will also remove a major fish passage barrier, providing access for state and federally listed coho salmon to over 14 miles of critical spawning and rearing habitat.

In 2021, CalTrout’s contractors installed over 16,000 linear feet of new conveyance pipeline to improve water efficiency, relocated and upgraded the water diversion system with an on-channel fish screen and 40 horsepower pump, installed 180 solar-modules generating 70.3 kW to offset utility costs, and installed a real-time telemetry-enable flow meter to give the Cardoza Ranch maximum control of irrigation water. In July 2021, our contractor initiated the removal of the outdated water diversion dam that degraded water quality and was an impediment to fish migration for almost a century. A bypass channel was constructed to divert flows around the work area to allow for the removal of the old, undersized culverts that were historically blocked to create the diversion impoundment. Installed sheet pile provides dry working conditions to build the subgrade to specification to support the aluminum span culvert, which will provide fish passage, while maintaining an adequate crossing for cattle and equipment. While the flow enhancement benefits from the project are already being realized, the new fish friendly crossing will be completed by the end of September 2021.

The Parks Creek Flow Enhancement Project resolves water conflict in the Mid-Klamath Basin and Siskiyou County by providing win-win engineering solutions that balance the needs of farmers and fish and wildlife.

Project Partners:

Cardoza Ranch

Emmerson Investments Inc

U.S. Fish and Wildlife Service

Wildlife Conservation Board

National Fish and Wildlife Foundation

AquaTerra Consulting

North River Construction

U.C. Davis

G.S. Black Inc

Michael Love and Associates

Menne Ranch


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