CX-033921: Tumalum Creek Culvert Fish Passage Improvement

Bonneville Power Administration (BPA) proposes to provide funds to the Nez Perce Tribe (NPT) to replace an existing 65-foot-long, 10-foot-wide corr…

Office of NEPA Policy and Compliance

May 29, 2025
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Bonneville Power Administration (BPA) proposes to provide funds to the Nez Perce Tribe (NPT) to replace an existing 65-foot-long, 10-foot-wide corrugated metal arch pipe with a 60-foot-long, 15-foot-wide four-sided concrete box culvert following Washington Department of Fish and Wildlife (WDFW) stream simulation design guidelines to ensure natural stream functions and fish passage through the structure.