East Fork Big Creek Dam A- 31 is an earth dam located in Harrison County, Missouri, built in 1965. It carries a Low hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall and 650 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 East Fork Big Creek Dam A- 31
The primary purpose of East Fork Big Creek Dam A- 31 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 E Fk Big Crk Wtrshd Subd (local government). It impounds the Tr-east Fork Big Creek near Bethany.
The dam stands 30 feet tall and stretches 650 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 94 acre-feet, and collects water from a drainage area of 48 square miles. Completed in 1965, 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 | Harrison |
| Nearest City | Bethany |
| River/Stream | Tr-east Fork Big Creek |
| Coordinates | 40.42690, -93.98711 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 28 ft |
| Dam Length | 650 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 94 acre-ft |
| Max Storage | 94 acre-ft |
| Normal Storage | 44 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 48 sq mi |
| Max Discharge | 329 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | E Fk Big Crk Wtrshd Subd |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO12141 |
| Federal ID | MO12141 |
| More Info | State Dam Safety Program |