Beaver Lake Dam is an earth dam located in Macoupin County, Illinois, built in 1912. It carries a Low hazard potential classification.
Dam profile
NID height · 16 ft16 ft tall and 390 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 Beaver Lake Dam
The primary purpose of Beaver Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Illinois Department of Natural Resources (state). It impounds the Trib Macoupin Creek near Hardin.
The dam stands 16 feet tall and stretches 390 feet across, creates a reservoir covering 57 acres, has a maximum storage capacity of 588 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1912, the structure is over a century 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 05/10/2024.
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Location
| State | Illinois |
| County | Macoupin |
| Nearest City | Hardin |
| River/Stream | Trib Macoupin Creek |
| Coordinates | 39.21057, -89.97556 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 390 ft |
| Year Completed | 1912 (114 years old) |
Storage & Hydraulics
| NID Storage | 588 acre-ft |
| Max Storage | 588 acre-ft |
| Normal Storage | 418 acre-ft |
| Surface Area | 57 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 125 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Illinois Department of Natural Resources |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 05/10/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL00779 |
| Federal ID | IL00779 |
| More Info | State Dam Safety Program |