Froghair Lake Dam is an earth dam located in McDonough County, Illinois, built in 1974. It carries a Low hazard potential classification.
Dam profile
NID height · 27 ft27 ft tall and 300 ft long, taller than 59% 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 Froghair Lake Dam
Froghair Lake Dam is a dam in McDonough, Illinois. The dam is owned by Jene Copland;jene Copland (private). It impounds the Killjordan Creek near Fandon.
The dam stands 27 feet tall and stretches 300 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 34 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1974, 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 10/21/2024.
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Location
| State | Illinois |
| County | McDonough |
| Nearest City | Fandon |
| River/Stream | Killjordan Creek |
| Coordinates | 40.40703, -90.73625 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Dam Length | 300 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 34 acre-ft |
| Max Storage | 34 acre-ft |
| Normal Storage | 24 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 52 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Jene Copland;jene Copland |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/21/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IL40099 |
| Federal ID | IL40099 |
| More Info | State Dam Safety Program |