Spring Lake Dam is an earth dam located in McDonough County, Illinois, built in 1927. It carries a Significant hazard potential classification.
Dam profile
NID height · 46 ft46 ft tall and 1,450 ft long, taller than 91% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Spring Lake Dam
The primary purpose of Spring Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City of Macomb (local government). It impounds the Spring Creek near Colchester-offstream.
The dam stands 46 feet tall and stretches 1,450 feet across, has a maximum storage capacity of 5,611 acre-feet, and collects water from a drainage area of 22 square miles. Completed in 1927, the structure is well-established, with more than 75 years of service.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. An emergency action plan is in place for this dam. The most recent inspection on record was 05/25/2023.
At 46 feet, this dam is taller than 91% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Illinois |
| County | McDonough |
| Nearest City | Colchester-offstream |
| River/Stream | Spring Creek |
| Coordinates | 40.50514, -90.72109 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 46 ft |
| Dam Height | 46 ft |
| Dam Length | 1,450 ft |
| Year Completed | 1927 (99 years old) |
Storage & Hydraulics
| NID Storage | 5,611 acre-ft |
| Max Storage | 5,611 acre-ft |
| Normal Storage | 3,363 acre-ft |
| Drainage Area | 22 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | City of Macomb |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 05/25/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | IL00268 |
| Federal ID | IL00268 |
| More Info | State Dam Safety Program |