Lake Dorothy Hydroelectric Project P-12379
General information | |
Waterway |
Dorothy Creek |
Current status | Active license  |
Type of facility | Conventional Hydro |
Type of permit | FERC License |
FERC information | |
FERC docket # | P-12379 |
FERC project name | Lake Dorothy |
Permit issued | 12/19/03 |
Permit expiration | 11/26/53 |
Ownership and operation | |
Owner | Alaska Electric Light&Power Co |
Owner type | Investor-Owned Utility |
Year first online (conventional hydro) | 2009 |
Transmission or distribution system owner | Alaska Electric Light&Power Co |
Power and generating capacity | |
Number of units | 1 |
Total capacity from hydraulic turbine-generator units within each plant | 14.3 MW |
Average annual net hydropower generation | 74,730.8 MWH |
The proposed project would be located at Lake Dorothy on Dorothy Creek, near Juneau, Alaska.
The proposed project consists of:
(1) the 1,138-acre Lake Dorothy and 305-acre Bart Lake;
(2) a lake tap of Lake Dorothy to convey water to Bart Lake, located near the Lake Dorothy outlet about 143 feet below the water surface;
(3) a lake tap of Bart Lake about 119 feet below the normal water surface;
(4) an 8.8-acre access corridor, with an overall clearing limit of 60 to 80 feet, from the powerhouse to the Bart Lake tap and penstock interface;
(5) a 6,900-foot-long power conduit from Bart Lake, consisting of a lake tap, short power tunnel, and 60-inch-diameter above-ground penstock;
(6) a 49-foot-wide, 110-foot-long powerhouse with one 14.3-MW Pelton impulse-type turbine/generator;
(7) a 2.6-acre site near the Taku Inlet tidewater that would be used for the combined powerhouse, maintenance shop and emergency crew quarters and would also serve as the construction staging area;
(8) a 100 to 125-foot-long tailrace that discharges into Taku Inlet;
(9) a switchyard and substation located adjacent to the powerhouse with a 138-kilovolt (kV) circuit breaker and 13.8-kV/138-kV step up transformer;
(10) a 3.5-mile-long, 138-kV overhead transmission line from the powerhouse to an intertie switchyard located at the east terminal of Alaska Industrial Development and Export Authority’s existing Snettisham Hydroelectric Project;
(11) a primitive access road from the powerhouse site to the Bart Lake lake tap and penstock interface; and
(12) other appurtenant facilities.
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News and updates
From Hydropower Reform Coalition11/19/2024
Monthly Newsletter: Exploring FERC-Exempt Hydro Projects: Small-Scale Hydropower with Big Impacts
From South Yuba River Citizens League9/25/2024
NID Withdraws Centennial Dam Proposal After SYRCL’s Decade-Long Opposition