Mermet Dam, also known as Mermet Lake, is a state-owned structure in Massac, Illinois, primarily designed for recreation purposes.
Wind
Humidity
Completed in 1950, this earth dam stands at a height of 10 feet and spans a length of 20,000 feet, with a storage capacity of 2,800 acre-feet and a surface area of 0.7 square miles. Situated on the Trib Tucker Ditch, the dam's controlled spillway is 16 feet wide, with a maximum discharge capacity of 150 cubic feet per second.
Managed by the Illinois Department of Natural Resources (IDNR), Mermet Dam has a low hazard potential and is subject to regular state regulation, inspection, and enforcement. Despite its very high risk assessment rating, the dam's condition assessment is currently not available, with no emergency action plan in place. The dam's outlet gates are operated by a slide (sluice gate) system, and it is located within the St. Louis District of the US Army Corps of Engineers jurisdiction. For enthusiasts interested in water resources and climate, Mermet Dam presents an intriguing case study in recreational dam infrastructure management and risk mitigation.
Year Completed |
1950 |
Dam Length |
20000 |
Dam Height |
10 |
River Or Stream |
TRIB TUCKER DITCH |
Primary Dam Type |
Earth |
Surface Area |
0.7 |
Drainage Area |
0.96 |
Nid Storage |
2800 |
Outlet Gates |
Slide (sluice gate) |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
10 |
Cache River At Forman
|
23cfs |
Bayou Creek Near Grahamville
|
5cfs |
Little Bayou Creek Near Grahamville
|
1cfs |
Ohio River At Metropolis
|
444000cfs |
Massac Creek Near Paducah
|
2cfs |
Lusk Creek Near Eddyville
|
6cfs |