Hebgen Dam
Dam in Gallatin County, Montana · Madison River · forms Hebgen Lake
Height
120 ft
37 m (NID height)
Length
721 ft
220 m
Completed
1915
Hebgen Lake today
6,529.85 ft
7 days ▼ 0.12 ft
Normal storage
386,000 acre-ft
Reservoir level measured Oct 23, 2026, 10:45 AM MDT. Full level page →
Facts
- Purposes
- Hydroelectric; Recreation; Water Supply; Flood Risk Reduction
- Dam type
- Earth
- Structural height
- 120 ft
- Owner
- Private
- Maximum storage
- 525,620 acre-ft
- Surface area
- 13,000 acres
- Hydraulic height
- 75 ft
- Drainage area
- 905 sq mi
- Spillway
- Controlled, 47 ft wide
- Army Corps district
- Walla Walla District
- NID ID
- MT00134
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Aug 26, 2026. Search NID ID MT00134 at nid.sec.usace.army.mil. Project website.