Angostura Dam
Dam in Fall River County, South Dakota · Cheyenne River · forms Angostura Reservoir
Height
193 ft
59 m (NID height)
Length
2,030 ft
619 m
Completed
1949
Angostura Reservoir today
3,169.45 ft
7 days ▲ 0.11 ft
Normal storage
86,160 acre-ft
Reservoir level measured Oct 21, 2026, 1:00 AM CDT. Full level page →
Facts
- Purposes
- Irrigation; Recreation
- Dam type
- Concrete
- Structural height
- 193 ft
- Owner
- BUREAU OF RECLAMATION (Federal)
- Maximum storage
- 197,100 acre-ft
- Surface area
- 4,706 acres
- Hydraulic height
- 136 ft
- Drainage area
- 9,096 sq mi
- Spillway
- Controlled, 250 ft wide
- Army Corps district
- Omaha District
- Also known as
- Angostura Reservoir
- NID ID
- SD01099
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Oct 22, 2025. Search NID ID SD01099 at nid.sec.usace.army.mil. Project website.