Marshall Golf Course Lake Dam is an earth dam located in Clark County, Illinois, built in 1940. It carries a Significant hazard potential classification.
Dam profile
NID height · 39 ft39 ft tall and 400 ft long, taller than 85% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Marshall Golf Course Lake Dam
The primary purpose of Marshall Golf Course 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 Marshall (local government). It impounds the Trib Big Creek near Marshall.
The dam stands 39 feet tall and stretches 400 feet across. Completed in 1940, 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. The most recent inspection on record was 06/11/2025.
At 39 feet, this dam is taller than 85% of dams nationwide.
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Location
| State | Illinois |
| County | Clark |
| Nearest City | Marshall |
| River/Stream | Trib Big Creek |
| Coordinates | 39.41154, -87.67631 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 39 ft |
| Dam Height | 39 ft |
| Dam Length | 400 ft |
| Year Completed | 1940 (86 years old) |
Ownership & Safety
| Purpose | Recreation |
| Owner | City of Marshall |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 06/11/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL50730 |
| Federal ID | IL50730 |
| More Info | State Dam Safety Program |