Sill Lake Dam is an earth dam located in Adams County, Illinois, built in 1951. It carries a Low hazard potential classification.
Dam profile
NID height · 25 ft25 ft tall and 165 ft long, taller than 50% 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 Sill Lake Dam
Sill Lake Dam is a dam in Adams, Illinois. The dam is owned by Gerald Sill (private). It impounds the Trib Bluff Canal,bear Creek near Lima-offstream.
The dam stands 25 feet tall and stretches 165 feet across, and has a maximum storage capacity of 51 acre-feet. Completed in 1951, 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.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Illinois |
| County | Adams |
| Nearest City | Lima-offstream |
| River/Stream | Trib Bluff Canal,bear Creek |
| Coordinates | 40.16292, -91.40496 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 165 ft |
| Year Completed | 1951 (75 years old) |
Storage & Hydraulics
| NID Storage | 51 acre-ft |
| Max Storage | 51 acre-ft |
| Normal Storage | 37 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Gerald Sill |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 04/08/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL01190 |
| Federal ID | IL01190 |
| More Info | State Dam Safety Program |