Gahr Pond Dam 1 is an earth dam located in Macoupin County, Illinois, built in 1976. It carries a Low hazard potential classification.
Dam profile
NID height · 32 ft32 ft tall and 205 ft long, taller than 74% 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 Gahr Pond Dam 1
The primary purpose of Gahr Pond Dam 1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Oneia Gahr;oneia Gahr (private). It impounds the Tr- Macoupin Creek N near Jalapa.
The dam stands 32 feet tall and stretches 205 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 31 acre-feet, and collects water from a drainage area of 0 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 05/10/2024.
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Location
| State | Illinois |
| County | Macoupin |
| Nearest City | Jalapa |
| River/Stream | Tr- Macoupin Creek N |
| Coordinates | 39.23164, -89.99248 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 205 ft |
| Year Completed | 1976 (50 years old) |
Storage & Hydraulics
| NID Storage | 31 acre-ft |
| Max Storage | 31 acre-ft |
| Normal Storage | 20 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 100 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Oneia Gahr;oneia Gahr |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 05/10/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IL40059 |
| Federal ID | IL40059 |
| More Info | State Dam Safety Program |