The project would be a 5 MW hydroelectric facility located on Grant Creek and Grant Lake, near the community of Moose Pass, Alaska, in the Kenai Peninsula Borough, about 25 miles north of Seward, Alaska. The project would require the construction of the following new facilities: (1) a reinforced concrete intake with an outside dimension of 38 feet by 20 feet, intake trash racks, and a vertical turbine pump to provide base flows; (2) a 100-foot-long concrete bypass weir at the natural Grant Lake outlet with a crest elevation at 703 feet; (3) a buried, 400-foot-long, 16-inch-diameter bypass flow pipe to carry pumped flows from the intake to just below the bypass weir; (4) a 3,300-foot-long tunnel from the project intake to the powerhouse that transitions to a 6-foot-diameter, steel penstock about 150 feet from the powerhouse; (5) a 100-foot-long by 50-foot-wide powerhouse with two horizontal Francis type turbine/generator units with a total rated capacity of 5 MW; (6) a trapezoidal tailrace channel with a bottom width of 74 feet and a channel depth ranging from 13 feet at the powerhouse to 8 feet at the creek; (7) a 3.6-acre tailrace detention pond with 15 acre-feet of storage capacity; and (8) a 5,567-foot-long, 115-kilovolt transmission line. The project would bypass stream flows around 0.6 mile of Grant Creek (bypassed reach). The project is located on U.S. Forest Service and Alaska Department of Natural Resources managed lands.
Record of Decision - PDF