Grindstone-lost-muddy A-8 Dam is an earth dam located in DeKalb County, Missouri, built in 1985. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 39 ft39 ft tall and 450 ft long, taller than 85% 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 Grindstone-lost-muddy A-8 Dam
The primary purpose of Grindstone-lost-muddy A-8 Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Glm Watershed Subdistrct (local government). It impounds the Trib Grindstone Creek.
The dam stands 39 feet tall and stretches 450 feet across, creates a reservoir covering 11 acres, has a maximum storage capacity of 85 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1985, the structure is 41 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 03/23/2021.
At 39 feet, this dam is taller than 85% of dams nationwide.
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Location
| State | Missouri |
| County | DeKalb |
| River/Stream | Trib Grindstone Creek |
| Coordinates | 39.80281, -94.28686 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 39 ft |
| Dam Height | 37 ft |
| Dam Length | 450 ft |
| Year Completed | 1985 (41 years old) |
Storage & Hydraulics
| NID Storage | 85 acre-ft |
| Max Storage | 85 acre-ft |
| Normal Storage | 85 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 720 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Glm Watershed Subdistrct |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 03/23/2021 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MO12198 |
| Federal ID | MO12198 |
| More Info | State Dam Safety Program |