Long Pond Dam
Long Pond Dam is an earth dam located in Greene County, Illinois, built in 1965. It carries a Undetermined hazard potential classification.
About Long Pond Dam
The primary purpose of Long Pond Dam 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 Harry Long;harry Long (private). It impounds the Tr- Macoupin Creek near Jalapy.
The dam stands 17 feet tall and stretches 300 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 59 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1965, the structure is well into its service life at over 50 years old.
The most recent inspection on record was 08/27/2025.
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Location
| State | Illinois |
| County | Greene |
| Nearest City | Jalapy |
| River/Stream | Tr- Macoupin Creek |
| Coordinates | 39.23389, -90.28443 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 17 ft |
| Dam Height | 17 ft |
| Dam Length | 300 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 59 acre-ft |
| Max Storage | 59 acre-ft |
| Normal Storage | 31 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 138 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | HARRY LONG;HARRY LONG |
| Owner Type | Private |
| Hazard Classification | Undetermined |
| Condition Assessment | Not Available |
| Last Inspection | 08/27/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL40033 |
| Federal ID | IL40033 |
| More Info | State Dam Safety Program |