Mill Creek Structure 7 Dam is an earth dam located in Clark County, Illinois, built in 1976. It carries a Low hazard potential classification.
Dam profile
NID height · 42 ft42 ft tall and 760 ft long, taller than 88% 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 Mill Creek Structure 7 Dam
The primary purpose of Mill Creek Structure 7 Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Mill Creek Conservancy District (private). It impounds the Hurricane Creek near Hutsonville.
The dam stands 42 feet tall and stretches 760 feet across, creates a reservoir covering 55 acres, has a maximum storage capacity of 3,723 acre-feet, and collects water from a drainage area of 8 square miles. Completed in 1976, the structure is 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. The most recent inspection on record was 11/08/2023.
At 42 feet, this dam is taller than 88% 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 | Clark |
| Nearest City | Hutsonville |
| River/Stream | Hurricane Creek |
| Coordinates | 39.32327, -87.76975 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 42 ft |
| Dam Height | 42 ft |
| Dam Length | 760 ft |
| Year Completed | 1976 (50 years old) |
Storage & Hydraulics
| NID Storage | 3,723 acre-ft |
| Max Storage | 3,723 acre-ft |
| Normal Storage | 546 acre-ft |
| Surface Area | 55 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 4,870 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Mill Creek Conservancy District |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 11/08/2023 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL00968 |
| Federal ID | IL00968 |
| More Info | State Dam Safety Program |