Fort Peck Dam
Dam in McCone County, Montana · Missouri River · forms Fort Peck Reservoir
Height
256 ft
78 m (NID height)
Length
21,026 ft
6,409 m
Completed
1940
Fort Peck Reservoir today
2,221.61 ft
7 days ▼ 0.32 ft
vs full pool
▼ 12.39 ft
Normal storage
15,400,000 acre-ft
Normal for the date
Reservoir level measured Oct 23, 2026, 10:00 AM MDT. Full level page →
Facts
- Purposes
- Flood Risk Reduction; Irrigation; Navigation; Recreation; Hydroelectric
- Dam type
- Earth
- Structural height
- 256 ft
- Owner
- USACE - Omaha District (Federal)
- Maximum storage
- 19,100,000 acre-ft
- Surface area
- 93,000 acres
- Hydraulic height
- 220 ft
- Drainage area
- 57,725 sq mi
- Spillway
- Controlled, 640 ft wide
- Army Corps district
- Omaha District
- Also known as
- Fort Peck Lake
- NID ID
- MT00025
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Apr 20, 2026. Search NID ID MT00025 at nid.sec.usace.army.mil. Project website.