Lentman Lake Dam is an earth dam located in Livingston County, Illinois, built in 1965. It carries a Low hazard potential classification.
Dam profile
NID height · 12 ft12 ft tall and 310 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 Lentman Lake Dam
The primary purpose of Lentman Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Illinois-american Water Company (private). It impounds the Vermilion River-offstream near Streator.
The dam stands 12 feet tall and stretches 310 feet across, and has a maximum storage capacity of 198 acre-feet. Completed in 1965, 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 09/30/2020.
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Location
| State | Illinois |
| County | Livingston |
| Nearest City | Streator |
| River/Stream | Vermilion River-offstream |
| Coordinates | 41.08847, -88.82295 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 310 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 198 acre-ft |
| Max Storage | 198 acre-ft |
| Normal Storage | 74 acre-ft |
| Spillway Type | None |
Ownership & Safety
| Purpose | Recreation |
| Owner | Illinois-american Water Company |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 09/30/2020 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL01134 |
| Federal ID | IL01134 |
| More Info | State Dam Safety Program |