Thomas Lake Dam
Thomas Lake Dam is an earth dam located in Hancock County, Illinois, built in 1975. It carries a Low hazard potential classification.
About Thomas Lake Dam
The primary purpose of Thomas Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Loren Thomas (private). It impounds the Trib Rock Creek near Webster-offstream.
The dam stands 25 feet tall and stretches 260 feet across, and has a maximum storage capacity of 61 acre-feet. Completed in 1975, 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 04/08/2024.
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Location
| State | Illinois |
| County | Hancock |
| Nearest City | Webster-offstream |
| River/Stream | Trib Rock Creek |
| Coordinates | 40.48058, -91.07325 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 260 ft |
| Year Completed | 1975 (51 years old) |
Storage & Hydraulics
| NID Storage | 61 acre-ft |
| Max Storage | 61 acre-ft |
| Normal Storage | 37 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | LOREN THOMAS |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Available |
| Last Inspection | 04/08/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL01168 |
| Federal ID | IL01168 |
| More Info | State Dam Safety Program |