Tomahawk Lake Dam is an earth dam located in Bond County, Illinois, built in 1966. It carries a Low hazard potential classification.
Dam profile
NID height · 19 ft19 ft tall and 505 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 Tomahawk Lake Dam
The primary purpose of Tomahawk Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Thomas A. Brown, Jr. (private). It impounds the Shoal Creek-offstream near Jamestown-offstream.
The dam stands 19 feet tall and stretches 505 feet across, and has a maximum storage capacity of 52 acre-feet. Completed in 1966, 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 06/22/2018.
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Location
| State | Illinois |
| County | Bond |
| Nearest City | Jamestown-offstream |
| River/Stream | Shoal Creek-offstream |
| Coordinates | 38.76022, -89.51675 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 505 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 52 acre-ft |
| Max Storage | 52 acre-ft |
| Normal Storage | 34 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Thomas A. Brown, Jr. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 06/22/2018 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL00595 |
| Federal ID | IL00595 |
| More Info | State Dam Safety Program |