USFWS Toppenish National Wildlife Refuge, Intake Structure Improvement Project

KPFF provided civil and water resources engineering, survey, environmental permitting, and construction services for this intake structure improvement project at the USFWS Toppenish National Wildlife Refuge near Toppenish, Washington. This project addressed historic operational deficiencies that have been identified within the Gamble Pump Station and incorporated improvements to satisfy the National Oceanic and Atmospheric Administration (NOAA) and Washington Department of Fish and Wildlife (WDFW) intake screen requirements to protect aquatic life. The project improves access and safety for cleaning operations for USFWS staff, the approach velocity of the screens to reduce entrainment of debris on the screens, and the ability of the screens to deal with icing issues and frazil ice build-up during cold periods of water delivery. In addition, the project provided new vertical turbine irrigation pumps with 100% diversion redundancy.

KPFF provided USFWS with federal, state, and local permitting and environmental documentation including Corps Clean Water Act Section 404, EPA Section 401 Water Quality Certification, Endangered Species Act Compliance, and a Yakama Nation Hydraulic Permit. This project was constructed in 2022.