Greenville New City Dam is an earth dam located in Bond County, Illinois, built in 1969. It carries a Significant hazard potential classification.
Dam profile
NID height · 40 ft40 ft tall and 1,200 ft long, taller than 86% 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 Greenville New City Dam
The primary purpose of Greenville New City 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 Greenville (local government). It impounds the Kingsbury Branch Shoal Creek near Greenville.
The dam stands 40 feet tall and stretches 1,200 feet across, creates a reservoir covering 900 acres, has a maximum storage capacity of 22,400 acre-feet, and collects water from a drainage area of 34 square miles. Completed in 1969, the structure is well into its service life at over 50 years old.
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 08/28/2025.
At 40 feet, this dam is taller than 86% of dams nationwide.
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Location
| State | Illinois |
| County | Bond |
| Nearest City | Greenville |
| River/Stream | Kingsbury Branch Shoal Creek |
| Coordinates | 38.92531, -89.40031 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Height | 40 ft |
| Dam Length | 1,200 ft |
| Year Completed | 1969 (57 years old) |
Storage & Hydraulics
| NID Storage | 22,400 acre-ft |
| Max Storage | 22,400 acre-ft |
| Normal Storage | 9,900 acre-ft |
| Surface Area | 900 acres |
| Drainage Area | 34 sq mi |
| Max Discharge | 15,568 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | City of Greenville |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 08/28/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | IL00594 |
| Federal ID | IL00594 |
| More Info | State Dam Safety Program |