Willow Creek Watershed Dam A- 27 is an earth dam located in Ray County, Missouri, built in 1972. It carries a Low hazard potential classification.
Dam profile
NID height · 35 ft35 ft tall and 650 ft long, taller than 80% 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 Willow Creek Watershed Dam A- 27
The primary purpose of Willow Creek Watershed Dam A- 27 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 Willow Cr Wrsd Subdistrt (local government). It impounds the Tr-willow Creek near Henrietta.
The dam stands 35 feet tall and stretches 650 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 268 acre-feet, and collects water from a drainage area of 380 square miles. Completed in 1972, 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. The most recent inspection on record was 05/17/1979. That was over 47 years ago.
At 35 feet, this dam is taller than 80% of dams nationwide.
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Location
| State | Missouri |
| County | Ray |
| Nearest City | Henrietta |
| River/Stream | Tr-willow Creek |
| Coordinates | 39.24473, -94.00706 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Height | 33 ft |
| Dam Length | 650 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 268 acre-ft |
| Max Storage | 268 acre-ft |
| Normal Storage | 168 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 380 sq mi |
| Max Discharge | 130 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | Willow Cr Wrsd Subdistrt |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 05/17/1979 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO10233 |
| Federal ID | MO10233 |
| More Info | State Dam Safety Program |