Tag: Shasta Valley RCD

This project modified the Montague-Grenada Weir — a concrete flow measurement structure on the mainstem Shasta River in Siskiyou County that functioned as a near year-round fish passage barrier — by raising the low-flow sill to eliminate the hydraulic drop while preserving the structure’s water measurement function. The modification improves passage for all life stages of Coho salmon, Chinook salmon, steelhead, and Pacific lamprey at river mile 14.6 on one of California’s historically most productive salmon rivers, a tributary to the Klamath River.