R. Johnson Pond Dam is an earth dam located in Warren County, Illinois, built in 1970. It carries a Low hazard potential classification.
Dam profile
NID height · 26 ft26 ft tall and 150 ft long, taller than 55% 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 R. Johnson Pond Dam
The primary purpose of R. Johnson 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 Raymond Johnson;raymond Johnson (private). It impounds the Henderson Creek S S Fork near Biggsville.
The dam stands 26 feet tall and stretches 150 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 36 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1970, 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 10/11/2023.
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Location
| State | Illinois |
| County | Warren |
| Nearest City | Biggsville |
| River/Stream | Henderson Creek S S Fork |
| Coordinates | 40.81696, -90.78725 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 150 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 36 acre-ft |
| Max Storage | 36 acre-ft |
| Normal Storage | 21 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 200 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | Raymond Johnson;raymond Johnson |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/11/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IL40148 |
| Federal ID | IL40148 |
| More Info | State Dam Safety Program |