Big Bend Dam
Dam in Lyman County, South Dakota · Missouri River · forms Big Bend Reservoir
Height
205 ft
62 m (NID height)
Length
10,570 ft
3,222 m
Completed
1963
Big Bend Reservoir today
1,420.29 ft
7 days ▼ 0.32 ft
vs full pool
▲ 0.29 ft
Normal storage
1,725,000 acre-ft
Much below normal for the date
Reservoir level measured Oct 23, 2026, 12:00 PM CDT. Full level page →
Facts
- Purposes
- Flood Risk Reduction; Irrigation; Navigation; Recreation; Hydroelectric
- Dam type
- Earth
- Structural height
- 205 ft
- Owner
- USACE - Omaha District (Federal)
- Maximum storage
- 1,900,000 acre-ft
- Surface area
- 60,000 acres
- Hydraulic height
- 89 ft
- Drainage area
- 5,840 sq mi
- Spillway
- Controlled, 376 ft wide
- Army Corps district
- Omaha District
- Also known as
- Lake Sharpe
- NID ID
- SD01092
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Aug 31, 2026. Search NID ID SD01092 at nid.sec.usace.army.mil. Project website.