The Shasta River is an important river for Chinook Salmon and Steelhead production. Northwest Biological Consulting (NBC) completed the removal of an irrigation dam on the Shasta River, near Grenada California in 2008, as part of a larger Marrone Construction project to build a new irrigation pump station and fish screen. The old irrigation dam contained an obsolete fish ladder which contributed to the fish migration barrier of the dam. The water management portion of the project and building the fish passage grade control structures and bank stabilization/bridge work was a major part of the effort that was done by NBC. Adherence to strict water quality standards and erosion control was also an important part of the work. The NBC crew built and maintained a complex river bypass system which diverted the entire Shasta River in two locations. This was necessary to dewater the work area for the dam removal and pump station and fish screen construction. In addition, NBC constructed and maintained several large coffer dams that were used to isolate the river and divert the flows to the existing pump station which required 60cfs to operate throughout the irrigation season. The project was completed in December of 2008.