Nelson Dam No. 1 is an earth dam located in Clay County, Missouri, built in 1994. It carries a Low hazard potential classification.
Dam profile
NID height · 32 ft32 ft tall and 610 ft long, taller than 74% 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 Nelson Dam No. 1
The primary purpose of Nelson Dam No. 1 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 David Nelson (private). It impounds the Tr-carroll Creek near Mosby.
The dam stands 32 feet tall and stretches 610 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 94 acre-feet, and collects water from a drainage area of 480 square miles. Completed in 1994, the structure is 32 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 | Clay |
| Nearest City | Mosby |
| River/Stream | Tr-carroll Creek |
| Coordinates | 39.39541, -94.30321 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 610 ft |
| Year Completed | 1994 (32 years old) |
Storage & Hydraulics
| NID Storage | 94 acre-ft |
| Max Storage | 94 acre-ft |
| Normal Storage | 57 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 480 sq mi |
| Max Discharge | 194 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | David Nelson |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO50143 |
| Federal ID | MO50143 |
| More Info | State Dam Safety Program |