Deweese Gp-12 is an earth dam located in Harper County, Oklahoma, built in 1959. It carries a Low hazard potential classification.
Dam profile
NID height · 31 ft31 ft tall and 162 ft long, taller than 72% 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 Deweese Gp-12
Deweese Gp-12 is a dam in Harper, Oklahoma. The dam is owned by Deweese Estate (private). It impounds the Sand Creek near Fort Supply.
The dam stands 31 feet tall and stretches 162 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 50 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1959, 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.
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Location
| State | Oklahoma |
| County | Harper |
| Nearest City | Fort Supply |
| River/Stream | Sand Creek |
| Coordinates | 36.64851, -99.46225 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 31 ft |
| Dam Height | 31 ft |
| Dam Length | 162 ft |
| Year Completed | 1959 (67 years old) |
Storage & Hydraulics
| NID Storage | 50 acre-ft |
| Max Storage | 50 acre-ft |
| Normal Storage | 31 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Owner | Deweese Estate |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OK83823 |
| Federal ID | OK83823 |
| More Info | State Dam Safety Program |