Grindstone-lost-muddy Watershed Dam D-23 is an earth dam located in DeKalb County, Missouri, built in 1975. It carries a Low hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall and 600 ft long, taller than 68% 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 D-23
The primary purpose of Grindstone-lost-muddy Watershed Dam D-23 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 Grns-ls-md Wrsd Sbdis (local government). It impounds the Tr-n.fork Lost Creek near Pattonsburg.
The dam stands 30 feet tall and stretches 600 feet across, creates a reservoir covering 24 acres, has a maximum storage capacity of 223 acre-feet, and collects water from a drainage area of 350 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.
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Location
| State | Missouri |
| County | DeKalb |
| Nearest City | Pattonsburg |
| River/Stream | Tr-n.fork Lost Creek |
| Coordinates | 40.00290, -94.32823 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 600 ft |
| Year Completed | 1975 (51 years old) |
Storage & Hydraulics
| NID Storage | 223 acre-ft |
| Max Storage | 223 acre-ft |
| Normal Storage | 75 acre-ft |
| Surface Area | 24 acres |
| Drainage Area | 350 sq mi |
| Max Discharge | 436 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | Grns-ls-md Wrsd Sbdis |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO11913 |
| Federal ID | MO11913 |
| More Info | State Dam Safety Program |