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Biological Opinion: McMinnville Water and Light: McGuire Dam (Corps Permit ID No. 1997-01567)
| 题名： | Biological Opinion: McMinnville Water and Light: McGuire Dam (Corps Permit ID No. 1997-01567) |
| 关键词： | Biological effects; Endangered species; Natural resources conservation; Dams; Fish passage facilities; Anadromous fishes; Habitats; Reservoirs; Water quality; Mitigation; Migration; Chutes; Aquatic ecosystems; Regulations; Oregon |
| 摘要： | McMinnville Water & Light (applicant) has applied for a permit with the U.S. Army Corps of Engineers, Portland District (Corps), to expand McGuire Reservoir by raising the elevation of McGuire Dam. The purpose of the expansion is to meet projected near-term municipal water needs to the year 2020 for the City of McMinnville. McGuire Reservoir and Dam are located in Yamhill County approximately 14 miles northwest of the City of McMinnville, near the crest of the coast range. McGuire Reservoir essentially constitutes the headwaters of the Nestucca River, which flows west to the Pacific Ocean. Fish passage was not included in the original construction (1969) of McGuire Dam. Oregon state law requires that fish passage be provided at any dam or artificial obstruction across any body of water in which game fish exist (Oregon Revised Statutes 498.351 and 509.605). Accordingly, the applicant undertook an analysis of fish passage alternatives in connection with the proposed action. This evaluation was coordinated with the National Marine Fisheries Service (NMFS), Oregon Department of Fish and Wildlife (ODFW), Corps, U.S. Fish and Wildlife Service, and the Bureau of Land Management. It was concluded that fish passage was not feasible for the following reasons: Extreme fluctuation in reservoir levels under normal operations, lack of stored water available for adequate passage flows, and limited habitat availability just 1.3 miles of stream habitat will be available above the dam after the reservoir is raised. Therefore, pursuant to House Bill 2607, the applicant requested that the Oregon State Fish and Wildlife Commission waive fish passage and allow alternative mitigation. The alternative mitigation proposed by the applicant was modification of a reach of the Nestucca River commonly referred to as the chute. The chute is located approximately 2.6 miles downstream of McGuire Dam, and is thought to be at least a partial barrier to anadromous fish and may be a complete barrier to Oregon Coast coho salmon. The proposed modifications are expected to provide better fish passage conditions for anadromous fish. |
| 总页数： | 26p |
| 报告类型： | 科技报告 |
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