Rinaker Lake Dam is an earth dam located in Macoupin County, Illinois, built in 1900. It carries a Low hazard potential classification.
Dam profile
NID height · 23 ft23 ft tall and 245 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 Rinaker Lake Dam
The primary purpose of Rinaker Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Macoupin Lake Club (private). It impounds the Trib Hurricane Creek near Hardin.
The dam stands 23 feet tall and stretches 245 feet across, and has a maximum storage capacity of 155 acre-feet. Completed in 1900, 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 04/07/2025.
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Location
| State | Illinois |
| County | Macoupin |
| Nearest City | Hardin |
| River/Stream | Trib Hurricane Creek |
| Coordinates | 39.25291, -89.91309 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Height | 23 ft |
| Dam Length | 245 ft |
| Year Completed | 1900 (126 years old) |
Storage & Hydraulics
| NID Storage | 155 acre-ft |
| Max Storage | 155 acre-ft |
| Normal Storage | 102 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Macoupin Lake Club |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 04/07/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL00783 |
| Federal ID | IL00783 |
| More Info | State Dam Safety Program |