Scs-mill Creek Site-15 is an earth dam located in Johnston County, Oklahoma, built in 1969. It carries a Low hazard potential classification.
Dam profile
NID height · 38 ft38 ft tall and 1,600 ft long, taller than 84% 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 Scs-mill Creek Site-15
The primary purpose of Scs-mill Creek Site-15 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 Johnston Co Cons Dist (state). It impounds the Tr-mill Creek near Mill Creek.
The dam stands 38 feet tall and stretches 1,600 feet across, creates a reservoir covering 21 acres, and has a maximum storage capacity of 1,172 acre-feet. Completed in 1969, 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 01/01/1980. That was over 46 years ago.
At 38 feet, this dam is taller than 84% of dams nationwide.
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Location
| State | Oklahoma |
| County | Johnston |
| Nearest City | Mill Creek |
| River/Stream | Tr-mill Creek |
| Coordinates | 34.42914, -96.86168 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 38 ft |
| Dam Height | 38 ft |
| Dam Length | 1,600 ft |
| Year Completed | 1969 (57 years old) |
Storage & Hydraulics
| NID Storage | 1,172 acre-ft |
| Max Storage | 1,172 acre-ft |
| Normal Storage | 123 acre-ft |
| Surface Area | 21 acres |
| Max Discharge | 4,170 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Johnston Co Cons Dist |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 01/01/1980 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OK02002 |
| Federal ID | OK02002 |
| More Info | State Dam Safety Program |