E. Br. S. Fk. Blackwater Wtrshed F-28 is a dam located in Johnson County, Missouri, built in 1956. It carries a Significant hazard potential classification.
Dam profile
NID height · 26 ft26 ft tall, taller than 55% 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 E. Br. S. Fk. Blackwater Wtrshed F-28
The primary purpose of E. Br. S. Fk. Blackwater Wtrshed F-28 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 local government-owned. It impounds the Tr-s Fk Blackwater River.
The dam stands 26 feet tall, creates a reservoir covering 5 acres, has a maximum storage capacity of 86 acre-feet, and collects water from a drainage area of 240 square miles. Completed in 1956, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life.
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Location
| State | Missouri |
| County | Johnson |
| River/Stream | Tr-s Fk Blackwater River |
| Coordinates | 38.82967, -94.06375 |
Physical Characteristics
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Year Completed | 1956 (70 years old) |
Storage & Hydraulics
| NID Storage | 86 acre-ft |
| Max Storage | 86 acre-ft |
| Normal Storage | 86 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 240 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO20740 |
| Federal ID | MO20740 |
| More Info | State Dam Safety Program |