| Black Canyon Diversion Dam | |
| Location Map: | Idaho |
| Coordinates: | 43.9305°N -116.4364°W |
| Country: | United States |
| Purpose: | P |
| Status: | O |
| Builder: | United States Bureau of Reclamation |
| Owner: | Bureau of Reclamation |
| Operator: | Bureau of Reclamation |
| Dam Type: | G |
| Dam Crosses: | Payette River |
| Spillway Type: | Ogee crest controlled by three 64-foot-long steel drum gates |
| Res Name: | Black Canyon Reservoir |
| Plant Type: | C |
| Plant Turbines: | 2 Francis turbines |
| Plant Capacity: | 10.2 |
| Plant Capacity Factor: | 70.8 |
Black Canyon Diversion Dam is a dam in Gem County, Idaho.
The concrete dam was originally completed in 1924, then re-constructed between 1951 and 1955, by the United States Bureau of Reclamation. Its structure has a height of, and a length of at its crest.[1] It impounds the Payette River for the diversion of water into the Black Canyon and North Side Main irrigation canals, and the generation of about 2 megawatts of hydroelectric power, part of the Bureau's larger Boise Project.[2] The dam is owned and operated by the Bureau.
The riverine reservoir it creates, the Black Canyon Reservoir, has a normal water surface of, about twelve miles of shoreline, and an original maximum capacity of 44,700 acre-feet, reduced by siltation to about 31,200 acre-feet.[3] Recreation includes boating and fishing.[4] The installation of a third hydropower generating unit has been funded by Bonneville Power Administration for completion in 2013.[5]