Neffs Lake Dam
Neffs Lake Dam is an earth dam located in Marion County, Illinois, built in 1963. It carries a Low hazard potential classification.
About Neffs Lake Dam
The primary purpose of Neffs Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Southern Gardens Inc. (private). It impounds the Trib Bear Branch-offstream near Wayne City.
The dam stands 22 feet tall and stretches 310 feet across, and has a maximum storage capacity of 56 acre-feet. Completed in 1963, 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 07/18/2018.
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Location
| State | Illinois |
| County | Marion |
| Nearest City | Wayne City |
| River/Stream | Trib Bear Branch-offstream |
| Coordinates | 38.64198, -88.82728 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 310 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 56 acre-ft |
| Max Storage | 56 acre-ft |
| Normal Storage | 50 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | SOUTHERN GARDENS INC. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Available |
| Last Inspection | 07/18/2018 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL00440 |
| Federal ID | IL00440 |
| More Info | State Dam Safety Program |