East Fork Big Creek Dam A- 4 is an earth dam located in Harrison County, Missouri, built in 1963. It carries a Low hazard potential classification.
Dam profile
NID height · 31 ft31 ft tall and 690 ft long, taller than 72% 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- 4
The primary purpose of East Fork Big Creek Dam A- 4 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 East Fk Big Cr Wshd Subd (local government). It impounds the Bracken Branch near Bethany.
The dam stands 31 feet tall and stretches 690 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 1,055 acre-feet, and collects water from a drainage area of 96 square miles. Completed in 1963, 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 | Bracken Branch |
| Coordinates | 40.48194, -93.94833 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 31 ft |
| Dam Height | 29 ft |
| Dam Length | 690 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 1,055 acre-ft |
| Max Storage | 1,055 acre-ft |
| Normal Storage | 209 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 96 sq mi |
| Max Discharge | 3,732 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | East Fk Big Cr Wshd Subd |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO10112 |
| Federal ID | MO10112 |
| More Info | State Dam Safety Program |