Johnson Pond Dam 1 is an earth dam located in Montgomery County, Illinois, built in 1966. It carries a Low hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall and 300 ft long, taller than 68% 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 Johnson Pond Dam 1
The primary purpose of Johnson Pond Dam 1 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 Paul D. Johnson;paul D. Johnson (private). It impounds the Tr- Shoal Creek E Mid Fork near Hillsboro.
The dam stands 30 feet tall and stretches 300 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 75 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1966, 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. The most recent inspection on record was 06/10/2015. That was over 11 years ago.
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Location
| State | Illinois |
| County | Montgomery |
| Nearest City | Hillsboro |
| River/Stream | Tr- Shoal Creek E Mid Fork |
| Coordinates | 39.18395, -89.46373 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 300 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 75 acre-ft |
| Max Storage | 75 acre-ft |
| Normal Storage | 50 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 158 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | Paul D. Johnson;paul D. Johnson |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 06/10/2015 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IL40103 |
| Federal ID | IL40103 |
| More Info | State Dam Safety Program |