Cottonwood Springs Dam
Dam in Fall River County, South Dakota · Cottonwood Springs Creek · forms Cottonwood Springs Lake
Height
123 ft
37 m (NID height)
Length
1,190 ft
363 m
Completed
1969
Cottonwood Springs Lake today
3,848.29 ft
7 days ▼ 0.10 ft
vs full pool
▼ 26.71 ft
Normal storage
655 acre-ft
Much below normal for the date
Reservoir level measured Oct 23, 2026, 2:00 PM CDT. Full level page →
Facts
- Purposes
- Flood Risk Reduction
- Dam type
- Earth
- Structural height
- 123 ft
- Owner
- USACE - Omaha District (Federal)
- Maximum storage
- 11,635 acre-ft
- Surface area
- 42 acres
- Hydraulic height
- 118 ft
- Drainage area
- 26 sq mi
- Spillway
- Uncontrolled, 275 ft wide
- Army Corps district
- Omaha District
- Also known as
- Cottonwood Springs Lake
- NID ID
- SD01096
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Jan 8, 2026. Search NID ID SD01096 at nid.sec.usace.army.mil. Project website.