West Fork Big Creek Dam B-109
West Fork Big Creek Dam B-109 is an earth dam located in Harrison County, Missouri, built in 1991. It carries a Low hazard potential classification.
About West Fork Big Creek Dam B-109
The primary purpose of West Fork Big Creek Dam B-109 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 West Fork Big Creek Watershed (local government). It impounds the Tr-west Fork Big Creek near Bethany.
The dam stands 28 feet tall and stretches 390 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 50 acre-feet, and collects water from a drainage area of 240 square miles. Completed in 1991, the structure is 35 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-west Fork Big Creek |
| Coordinates | 40.34405, -94.02987 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 27 ft |
| Dam Length | 390 ft |
| Year Completed | 1991 (35 years old) |
Storage & Hydraulics
| NID Storage | 50 acre-ft |
| Max Storage | 50 acre-ft |
| Normal Storage | 12 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 240 sq mi |
| Max Discharge | 163 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | WEST FORK BIG CREEK WATERSHED |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO50591 |
| Federal ID | MO50591 |
| More Info | State Dam Safety Program |