Lance No 1 is an earth dam located in Andrew County, Missouri, built in 1992. It carries a Low hazard potential classification.
Dam profile
NID height · 29 ft29 ft tall and 350 ft long, taller than 65% 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 Lance No 1
The primary purpose of Lance 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 Caryl Lance (private). It impounds the Tr-kellog Branch near Avenue City.
The dam stands 29 feet tall and stretches 350 feet across, creates a reservoir covering 1 acres, has a maximum storage capacity of 22 acre-feet, and collects water from a drainage area of 51 square miles. Completed in 1992, the structure is 34 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 | Andrew |
| Nearest City | Avenue City |
| River/Stream | Tr-kellog Branch |
| Coordinates | 40.00391, -94.86065 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 350 ft |
| Year Completed | 1992 (34 years old) |
Storage & Hydraulics
| NID Storage | 22 acre-ft |
| Max Storage | 22 acre-ft |
| Normal Storage | 10 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 51 sq mi |
| Max Discharge | 432 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | Caryl Lance |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO50000 |
| Federal ID | MO50000 |
| More Info | State Dam Safety Program |