Lanny Jokers Dam is an earth dam located in Macoupin County, Illinois. It carries a Low hazard potential classification.
Dam profile
NID height · 42 ft42 ft tall and 372 ft long, taller than 88% 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 Lanny Jokers Dam
The primary purpose of Lanny Jokers Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Lanny Jokers (private). It impounds the Trib Macoupin Creek near Summerville.
The dam stands 42 feet tall and stretches 372 feet across, creates a reservoir covering 28 acres, has a maximum storage capacity of 470 acre-feet, and collects water from a drainage area of 0 square miles.
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 05/10/2024.
At 42 feet, this dam is taller than 88% of dams nationwide.
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Location
| State | Illinois |
| County | Macoupin |
| Nearest City | Summerville |
| River/Stream | Trib Macoupin Creek |
| Coordinates | 39.21581, -90.07969 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 42 ft |
| Dam Height | 42 ft |
| Dam Length | 372 ft |
Storage & Hydraulics
| NID Storage | 470 acre-ft |
| Max Storage | 470 acre-ft |
| Normal Storage | 361 acre-ft |
| Surface Area | 28 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 172 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Lanny Jokers |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 05/10/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL50511 |
| Federal ID | IL50511 |
| More Info | State Dam Safety Program |