Gray Hawk Center Dam is an earth dam located in Lake County, Illinois. It carries a Significant hazard potential classification.
Dam profile
NID height · 8 ft8 ft tall and 450 ft long. 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 Gray Hawk Center Dam
The primary purpose of Gray Hawk Center 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 Hamilton Partners, Inc. (private). It impounds the Trib Flint Creek - Offstream near Lake Zurich.
The dam stands 8 feet tall and stretches 450 feet across, has a maximum storage capacity of 19 acre-feet, and collects water from a drainage area of 0 square miles.
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 07/16/2024.
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Location
| State | Illinois |
| County | Lake |
| Nearest City | Lake Zurich |
| River/Stream | Trib Flint Creek - Offstream |
| Coordinates | 42.18709, -88.09906 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 450 ft |
Storage & Hydraulics
| NID Storage | 19 acre-ft |
| Max Storage | 19 acre-ft |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Hamilton Partners, Inc. |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 07/16/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | IL55044 |
| Federal ID | IL55044 |
| More Info | State Dam Safety Program |