Anderson Ranch Dam
Dam in Elmore County, Idaho · South Fork Boise River · forms Anderson Ranch Reservoir
Height
456 ft
139 m (NID height)
Length
1,350 ft
411 m
Completed
1950
Anderson Ranch Reservoir today
4,150.35 ft
7 days ▼ 0.38 ft
Normal storage
464,216 acre-ft
Normal for the date
Reservoir level measured Oct 23, 2026, 2:00 AM MDT. Full level page →
Facts
- Purposes
- Flood Risk Reduction; Irrigation; Hydroelectric
- Dam type
- Earth
- Structural height
- 456 ft
- Owner
- BUREAU OF RECLAMATION (Federal)
- Maximum storage
- 474,942 acre-ft
- Surface area
- 4,815 acres
- Hydraulic height
- 332 ft
- Drainage area
- 976 sq mi
- Spillway
- Controlled, 50 ft wide
- Army Corps district
- Sacramento District
- Also known as
- Anderson Ranch Reservoir
- NID ID
- ID00279
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Oct 6, 2026. Search NID ID ID00279 at nid.sec.usace.army.mil. Project website.