South Fork Blackwater River Dam E- 25a is an earth dam located in Johnson County, Missouri, built in 1982. It carries a Low hazard potential classification.
Dam profile
NID height · 33 ft33 ft tall and 720 ft long, taller than 76% 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 South Fork Blackwater River Dam E- 25a
The primary purpose of South Fork Blackwater River Dam E- 25a 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 S.fk.blkwtr.wtrshd.district (local government). It impounds the Pin Oak Creek near St. Johns Church.
The dam stands 33 feet tall and stretches 720 feet across, creates a reservoir covering 1 acres, has a maximum storage capacity of 277 acre-feet, and collects water from a drainage area of 339 square miles. Completed in 1982, the structure is 44 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. The most recent inspection on record was 11/01/2004. That was over 21 years ago.
At 33 feet, this dam is taller than 76% of dams nationwide.
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Location
| State | Missouri |
| County | Johnson |
| Nearest City | St. Johns Church |
| River/Stream | Pin Oak Creek |
| Coordinates | 38.74911, -94.00731 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 28 ft |
| Dam Length | 720 ft |
| Year Completed | 1982 (44 years old) |
Storage & Hydraulics
| NID Storage | 277 acre-ft |
| Max Storage | 277 acre-ft |
| Normal Storage | 127 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 339 sq mi |
| Max Discharge | 297 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | S.fk.blkwtr.wtrshd.district |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 11/01/2004 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO51355 |
| Federal ID | MO51355 |
| More Info | State Dam Safety Program |