NHC, with collaborating firms, assisted the California Department of Fish and Wildlife, local land owners, and water purveyors to remove instream barriers and improve fish protection and irrigation diversion structures in the Shasta Valley. The structures improve fish passage and prevent fish from being entrained into diversion structures to address complex water issues. NHC coordinated with stakeholders to identify needs and develop mutually beneficial solutions for several projects. A major project was the design of fish passage and water diversion improvements at the Grenada Irrigation District diversion on the Shasta River. The project removed a seasonal fish barrier at the diversion dam and installed a 40-cfs screened intake, pump station, and 1,600-foot supply line. NHC tasks included conducting site surveys, developing topographic data, analyzing hydrology and hydraulic alternatives, preparing construction documents, supporting grant procurement, and conducting construction observation and inspection.