Leo Johnson Lake Dam
Leo Johnson Lake Dam is an earth dam located in Whiteside County, Illinois, built in 1962. It carries a Low hazard potential classification.
About Leo Johnson Lake Dam
The primary purpose of Leo Johnson Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by George Woodridge (private). It impounds the Trib Elkhorn Creek near Galt-offstream.
The dam stands 20 feet tall and stretches 520 feet across, and has a maximum storage capacity of 78 acre-feet. Completed in 1962, 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 06/14/2023.
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Location
| State | Illinois |
| County | Whiteside |
| Nearest City | Galt-offstream |
| River/Stream | Trib Elkhorn Creek |
| Coordinates | 41.80941, -89.79316 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 520 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 78 acre-ft |
| Max Storage | 78 acre-ft |
| Normal Storage | 53 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | GEORGE WOODRIDGE |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Available |
| Last Inspection | 06/14/2023 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL00562 |
| Federal ID | IL00562 |
| More Info | State Dam Safety Program |