John Hall Dam is an earth dam located in Holt County, Missouri, built in 1972. It carries a Low hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall. 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 Hall Dam
The primary purpose of John Hall 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 John Hall (private). It impounds the Tr Davis Creek near Mound City.
The dam stands 20 feet tall, creates a reservoir covering 5 acres, has a maximum storage capacity of 54 acre-feet, and collects water from a drainage area of 210 square miles. Completed in 1972, 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 | Holt |
| Nearest City | Mound City |
| River/Stream | Tr Davis Creek |
| Coordinates | 40.11486, -95.21005 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 54 acre-ft |
| Max Storage | 54 acre-ft |
| Normal Storage | 33 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 210 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | John Hall |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO10507 |
| Federal ID | MO10507 |
| More Info | State Dam Safety Program |