Simpson Pond Dam is an earth dam located in Randolph County, Illinois, built in 1973. It carries a Low hazard potential classification.
Dam profile
NID height · 26 ft26 ft tall and 250 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 Simpson Pond Dam
The primary purpose of Simpson Pond Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by John & Claude Simson (private). It impounds the Horse Creek near Evansville.
The dam stands 26 feet tall and stretches 250 feet across, and has a maximum storage capacity of 113 acre-feet. Completed in 1973, 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 05/25/2023.
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Location
| State | Illinois |
| County | Randolph |
| Nearest City | Evansville |
| River/Stream | Horse Creek |
| Coordinates | 38.13702, -89.95695 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 250 ft |
| Year Completed | 1973 (53 years old) |
Storage & Hydraulics
| NID Storage | 113 acre-ft |
| Max Storage | 113 acre-ft |
| Normal Storage | 72 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | John & Claude Simson |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 05/25/2023 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL00789 |
| Federal ID | IL00789 |
| More Info | State Dam Safety Program |