Potthast Lake Dam is an earth dam located in Bond County, Illinois, built in 1974. It carries a Low hazard potential classification.
Dam profile
NID height · 15 ft15 ft tall and 640 ft long. 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 Potthast Lake Dam
The primary purpose of Potthast Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Clarence Potthast (private). It impounds the Trib Locust Fork near Germantown.
The dam stands 15 feet tall and stretches 640 feet across, and has a maximum storage capacity of 152 acre-feet. 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 04/26/2022.
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Location
| State | Illinois |
| County | Bond |
| Nearest City | Germantown |
| River/Stream | Trib Locust Fork |
| Coordinates | 38.77056, -89.57174 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 640 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 152 acre-ft |
| Max Storage | 152 acre-ft |
| Normal Storage | 60 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Clarence Potthast |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 04/26/2022 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL01019 |
| Federal ID | IL01019 |
| More Info | State Dam Safety Program |