Williams Lake Dam is an earth dam located in Washington County, Illinois, built in 1968. It carries a Low hazard potential classification.
Dam profile
NID height · 29 ft29 ft tall and 420 ft long, taller than 65% 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 Williams Lake Dam
The primary purpose of Williams Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Williams Farm (private). It impounds the Elkhorn Creek near Venedy-offstream.
The dam stands 29 feet tall and stretches 420 feet across, and has a maximum storage capacity of 311 acre-feet. Completed in 1968, 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 08/12/2022.
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Location
| State | Illinois |
| County | Washington |
| Nearest City | Venedy-offstream |
| River/Stream | Elkhorn Creek |
| Coordinates | 38.29861, -89.53279 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 420 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 311 acre-ft |
| Max Storage | 311 acre-ft |
| Normal Storage | 221 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Williams Farm |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 08/12/2022 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL00398 |
| Federal ID | IL00398 |
| More Info | State Dam Safety Program |