Gibson Dam
Dam in Teton County, Montana · North Fork Sun River · forms Gibson Reservoir
Height
199 ft
61 m (NID height)
Length
960 ft
293 m
Completed
1929
Gibson Reservoir today
4,611.61 ft
7 days ▼ 1.97 ft
Normal storage
99,059 acre-ft
Reservoir level measured Oct 21, 2026, 12:00 AM MDT. Full level page →
Facts
- Purposes
- Irrigation
- Dam type
- Concrete
- Structural height
- 199 ft
- Owner
- BUREAU OF RECLAMATION (Federal)
- Maximum storage
- 121,981 acre-ft
- Surface area
- 1,420 acres
- Hydraulic height
- 179 ft
- Drainage area
- 575 sq mi
- Spillway
- Controlled, 204 ft wide
- Army Corps district
- Omaha District
- Also known as
- Beaver Creek;Gibson Res
- NID ID
- MT00571
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Oct 22, 2025. Search NID ID MT00571 at nid.sec.usace.army.mil. Project website.