John Clark is an earth dam located in Mercer County, Missouri, built in 1995. It carries a Low hazard potential classification.
Dam profile
NID height · 28 ft28 ft tall and 307 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 John Clark
The primary purpose of John Clark 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 John Clark (private). It impounds the Muddy Creek near Mercer.
The dam stands 28 feet tall and stretches 307 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 22 acre-feet, and collects water from a drainage area of 12 square miles. Completed in 1995, the structure is 31 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 | Mercer |
| Nearest City | Mercer |
| River/Stream | Muddy Creek |
| Coordinates | 40.52657, -93.51709 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 307 ft |
| Year Completed | 1995 (31 years old) |
Storage & Hydraulics
| NID Storage | 22 acre-ft |
| Max Storage | 22 acre-ft |
| Normal Storage | 14 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 12 sq mi |
| Max Discharge | 8 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | John Clark |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO50674 |
| Federal ID | MO50674 |
| More Info | State Dam Safety Program |