Dellitt Lake Dam
Dellitt Lake Dam is an earth dam located in Mercer County, Illinois, built in 1975. It carries a Low hazard potential classification.
About Dellitt Lake Dam
The primary purpose of Dellitt Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by David L. Cooper (private). It impounds the Trib Pope Creek near Joy-offstream.
The dam stands 31 feet tall and stretches 197 feet across, and has a maximum storage capacity of 51 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 05/02/2025.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Illinois |
| County | Mercer |
| Nearest City | Joy-offstream |
| River/Stream | Trib Pope Creek |
| Coordinates | 41.16716, -90.72803 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 31 ft |
| Dam Height | 31 ft |
| Dam Length | 197 ft |
| Year Completed | 1975 (51 years old) |
Storage & Hydraulics
| NID Storage | 51 acre-ft |
| Max Storage | 51 acre-ft |
| Normal Storage | 35 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | DAVID L. COOPER |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Available |
| Last Inspection | 05/02/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL01135 |
| Federal ID | IL01135 |
| More Info | State Dam Safety Program |