Island Park Dam
Dam in Fremont County, Idaho · Henrys Fork · forms Island Park Dam
Height
94 ft
29 m (NID height)
Length
9,448 ft
2,880 m
Completed
1938
Island Park Dam today
6,282.37 ft
7 days ▲ 1.62 ft
Normal storage
127,646 acre-ft
Reservoir level measured Oct 21, 2026, 12:00 AM MDT. Full level page →
Facts
- Purposes
- Irrigation
- Dam type
- Earth
- Structural height
- 94 ft
- Owner
- BUREAU OF RECLAMATION (Federal)
- Maximum storage
- 169,646 acre-ft
- Surface area
- 8,680 acres
- Hydraulic height
- 75 ft
- Drainage area
- 494 sq mi
- Spillway
- Uncontrolled, 257 ft wide
- Army Corps district
- Omaha District
- Also known as
- Island Park Reservoir
- NID ID
- ID00272
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Oct 6, 2026. Search NID ID ID00272 at nid.sec.usace.army.mil. Project website.
Other dams at Island Park Dam
- Island Park Dike