Grindstone-lost-muddy Watershed Dam F- 20 is an earth dam located in Daviess County, Missouri, built in 1975. It carries a Low hazard potential classification.
Dam profile
NID height · 28 ft28 ft tall and 650 ft long, taller than 62% 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 Watershed Dam F- 20
The primary purpose of Grindstone-lost-muddy Watershed Dam F- 20 is grade stabilization. Grade stabilization dams prevent erosion by reducing the slope and velocity of water flowing through a channel. They're commonly used to stop gullies from deepening and to protect downstream land and infrastructure. The dam is owned by Glm Creek Wshd Sub-dist (local government). It impounds the Tr-grindstone Creek near Pattonsburg.
The dam stands 28 feet tall and stretches 650 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 103 acre-feet, and collects water from a drainage area of 216 square miles. Completed in 1975, 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 06/30/1980. That was over 46 years ago.
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Location
| State | Missouri |
| County | Daviess |
| Nearest City | Pattonsburg |
| River/Stream | Tr-grindstone Creek |
| Coordinates | 39.89111, -94.19833 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 650 ft |
| Year Completed | 1975 (51 years old) |
Storage & Hydraulics
| NID Storage | 103 acre-ft |
| Max Storage | 103 acre-ft |
| Normal Storage | 55 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 216 sq mi |
| Max Discharge | 300 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | Glm Creek Wshd Sub-dist |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 06/30/1980 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO11220 |
| Federal ID | MO11220 |
| More Info | State Dam Safety Program |