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Instream Flow Assessments. Principal investigator on more than 30 applications of the Instream Flow Incremental Methodology(IFIM) on a wide variety of riverine habitats. Designed unique applications of IFIM to determine project impacts, quantify inundated habitats, and identify appropriate instream flow regimes. Conducted habitat mapping and preference studies and integrated water temperature modeling results with habitat-flow relationships to evaluate several major water development projects. Successfully proposed and defended instream flow recommendations at water rights hearings. Water Project Impact Assessments. Managed and assisted in designing comprehensive fish population impact assessment models for anadromous species in the American River, Sacramento River, and Sacramento-San Joaquin Delta as part of water-marketing impact studies for the U. S. Bureau of Reclamation's Central Valley Project. Assessed effects of the Sacramento River Bank Protection Project on chinook salmon, steelhead trout, striped bass, and American shad. Conducted multibasin fisheries evaluations of proposed water management changes on the Nacimiento, San Antonio, and Salinas Rivers. Developed impact assessment models for small stream and reservoir trout fisheries for a proposed pumped-storage project in the Sierra Nevada, California. Designed and conducted state-of-the-art cumulative impact assessments for several environmental documents on potential basin- wide effects of water resource projects. Field Investigations. Managed an intensive, 2-year field inventory project for the California Department of Fish and Game to sample the San Joaquin River system for white bass. Designed and managed a sampling, compositing, and filleting program on the Sacramento River system to provide fish samples for dioxin contamination evaluations. Designed and implemented a 7-year aquatic monitoring program to evaluate the effects of hydroelectric development on trout populations and physical habitat characteristics in a mountain stream. Coordinated field activities of multiyear studies of steelhead trout ecology and habitat on the Ventura River and Arroyo de la Cruz, California. Developed a scoping report for investigations needed on the Yuba River to evaluate impacts from water transfers. Managed or conducted numerous other fish population and habitat sampling efforts on streams, rivers, canals, ponds, lakes, reservoirs, and estuaries.