Project Location: Little Shasta River, tributary to Shasta River near the town of Montague, in Siskiyou County.
Passage Assessment Database ID: 710300
Project Objectives: To improve Chinook, coho salmon and steelhead trout fish passage and prevent fish entrainment by 1) Removing a temporal barrier on Little Shasta River, 2) Combining two water diversion sites into one diversion site and 3) installing a fish screen to provide safe fish passage through this site while providing water to two diversion channels.
Little Shasta River Diversion Site - Pre-treatment conditions 8/3/2010
Project Description: Remove a sill barrier, construct a roughened channel feature and metered head gate diversion, and construct a self-cleaning fish screen.
Project actions/deliverables: A concrete sill, determined to be a temporal barrier to juvenile fish, was removed from the channel and replaced with an 80’ long x 30’wide engineered roughened channel to help improve fish passage while providing grade control. Willow and cottonwood trees, removed from the riparian zone during construction, were salvaged and replanted along the upper banks to help increase bank stabilization and improve riparian cover over time. At the upstream end of the channel, a 30- inch Waterman style diversion headgate was installed to provide a single point of diversion. Next to the diversion channel a self-cleaning, diagonal fish screen with a 60’ long 10” bypass pipe prevents fish entrainment in the diversion channel while accommodating the newly combined metered diversion rate of 7 cfs to the Montague Water Conservation District and Cowley diversions. The project proponent was the Shasta Valley Resource Conservation District. Project implementation occurred August 1, 2010 to October 31, 2010, and January 15, 2011 to March 30, 2011.
Little Shasta River Diversion Site - Post-treatment conditions 11/20/2013
Additional information can be obtained from CDFW Monitoring and Evaluation of Salmonid Habitat Restoration (MESHR) -- (707) 725-1068 1455 Sandy Prairie Ct, Suite J, Fortuna, CA 95540
Fish benefits/ecological value (i.e., species affected): Chinook, coho salmon and steelhead trout benefited from this project. The health of the riparian corridor was improved through tree plantings.
Other benefits (flood control, utilities, wildlife connectivity, etc.):
Challenges/lessons learned: Limited growth was observed two years after replanting willow and cottonwood along the banks - additional plantings were necessary to increase canopy cover in the channel.
Project partners: Department of Fish and Wildlife Fisheries Restoration Grant Program, Pacific States Marine Fisheries Commission, • Montague Water Conservation District, Shasta Valley Resource Conservation District
Project cost: $111,978
Funding sources: Department of Fish and Wildlife Fisheries Restoration Grant Program, Pacific States Marine Fisheries Commission, • Montague Water Conservation District, Shasta Valley Resource Conservation District
Monitoring and evaluation:
Initial performance standards or goals: Remove a sill barrier, construct a roughened channel feature and metered head gate diversion, and construct a self-cleaning fish screen.
Did the project make a difference, and if so, how? A functioning fish screen, reoval of the sill barrier, and creation of a roughened channel feature and metered head gate diversion were successful. Additional work needs to be done re: riparian plantings to enhance canopy cover in the channel.