Dam A-41
Dam A-41 is an earth dam located in Williamson County, Illinois, built in 1965. It carries a Low hazard potential classification and has a poor condition assessment.
About Dam A-41
The primary purpose of Dam A-41 is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by Us Fish And Wildlife Service (federal). It impounds the Unnamed Tributary.
The dam stands 24 feet tall and stretches 600 feet across, creates a reservoir covering 43 acres, has a maximum storage capacity of 620 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1965, the structure is well into its service life at over 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. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 06/20/2011. That was over 14 years ago.
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Location
| State | Illinois |
| County | Williamson |
| River/Stream | Unnamed Tributary |
| Coordinates | 37.66723, -89.06500 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 600 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 620 acre-ft |
| Max Storage | 620 acre-ft |
| Normal Storage | 400 acre-ft |
| Surface Area | 43 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 828 cfs |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | US FISH AND WILDLIFE SERVICE |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 06/20/2011 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IL00122 |
| Federal ID | IL00122 |
| More Info | State Dam Safety Program |