Black Canyon Diversion Dam
Dam in Gem County, Idaho · Payette River · forms Black Canyon Reservoir
Height
183 ft
56 m (NID height)
Length
1,039 ft
317 m
Completed
1924
Black Canyon Reservoir today
2,489.45 ft
7 days ▼ 3.65 ft
Normal storage
29,822 acre-ft
Reservoir level measured Oct 21, 2026, 12:00 AM MDT. Full level page →
Facts
- Purposes
- Hydroelectric; Irrigation
- Dam type
- Concrete
- Structural height
- 183 ft
- Owner
- BUREAU OF RECLAMATION (Federal)
- Maximum storage
- 31,200 acre-ft
- Surface area
- 1,100 acres
- Hydraulic height
- 112 ft
- Drainage area
- 2,680 sq mi
- Spillway
- Controlled, 192 ft wide
- Army Corps district
- Walla Walla District
- Also known as
- Black Canyon Reservoir
- NID ID
- ID00282
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Oct 6, 2026. Search NID ID ID00282 at nid.sec.usace.army.mil. Project website.