Longs Lake Dam
Longs Lake Dam is an earth dam located in Cass County, Illinois, built in 1960. It carries a Low hazard potential classification.
About Longs Lake Dam
The primary purpose of Longs Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Mrs. Orland Lynn, C/o Edward Long (private). It impounds the Trib Panther Creek near Chandlerville.
The dam stands 28 feet tall and stretches 175 feet across, and has a maximum storage capacity of 170 acre-feet. Completed in 1960, 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 06/06/2023.
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Location
| State | Illinois |
| County | Cass |
| Nearest City | Chandlerville |
| River/Stream | Trib Panther Creek |
| Coordinates | 40.03671, -90.12231 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 175 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 170 acre-ft |
| Max Storage | 170 acre-ft |
| Normal Storage | 85 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | MRS. ORLAND LYNN, C/O EDWARD LONG |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Available |
| Last Inspection | 06/06/2023 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL00505 |
| Federal ID | IL00505 |
| More Info | State Dam Safety Program |