Keyhole Dam
Dam in Crook County, Wyoming · Belle Fourche River · forms Keyhole Reservoir
Height
168 ft
51 m (NID height)
Length
3,420 ft
1,042 m
Completed
1952
Keyhole Reservoir today
4,083.74 ft
7 days ▼ 0.04 ft
vs full pool
▼ 15.56 ft
Normal storage
334,215 acre-ft
Below normal for the date
Reservoir level measured Oct 23, 2026, 11:00 AM MDT. Full level page →
Facts
- Purposes
- Flood Risk Reduction; Irrigation
- Dam type
- Earth
- Structural height
- 168 ft
- Owner
- BUREAU OF RECLAMATION (Federal)
- Maximum storage
- 629,025 acre-ft
- Surface area
- 9,411 acres
- Hydraulic height
- 83 ft
- Drainage area
- 1,950 sq mi
- Spillway
- Uncontrolled, 19 ft wide
- Army Corps district
- Omaha District
- Also known as
- Keyhole Reservoir
- NID ID
- WY01380
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Oct 6, 2026. Search NID ID WY01380 at nid.sec.usace.army.mil. Project website.