Shelbyville Dam
Dam in Shelby County, Illinois · Kaskaskia River · forms Shelbyville Lake Project
Height
138 ft
42 m (NID height)
Length
3,025 ft
922 m
Completed
1970
Shelbyville Lake Project today
599.45 ft
7 days ▼ 0.13 ft
vs full pool
▼ 0.25 ft
Normal storage
207,832 acre-ft
Normal for the date
Reservoir level measured Oct 22, 2026, 10:00 PM CDT. Full level page →
Facts
- Purposes
- Flood Risk Reduction; Other; Navigation; Fish and Wildlife Pond; Recreation; Water Supply
- Dam type
- Concrete
- Structural height
- 138 ft
- Owner
- USACE - St. Louis District (Federal)
- Maximum storage
- 1,026,546 acre-ft
- Surface area
- 11,100 acres
- Hydraulic height
- 102 ft
- Drainage area
- 1,054 sq mi
- Spillway
- Controlled, 156 ft wide
- Army Corps district
- St. Louis District
- Also known as
- Lake Shelbyville
- NID ID
- IL00118
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Aug 26, 2026. Search NID ID IL00118 at nid.sec.usace.army.mil. Project website.