Potawatomi Twins is an earth dam located in Comanche County, Oklahoma, built in 1950. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 23 ft23 ft tall and 800 ft long. 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 Potawatomi Twins
The primary purpose of Potawatomi Twins is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Fort Sill (federal). It impounds the West Cache Creek Os near Cache.
The dam stands 23 feet tall and stretches 800 feet across, creates a reservoir covering 11 acres, and has a maximum storage capacity of 170 acre-feet. Completed in 1950, the structure is well-established, with more than 75 years of service.
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. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 10/24/2019.
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Location
| State | Oklahoma |
| County | Comanche |
| Nearest City | Cache |
| River/Stream | West Cache Creek Os |
| Coordinates | 34.65678, -98.64118 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Height | 23 ft |
| Dam Length | 800 ft |
| Year Completed | 1950 (76 years old) |
Storage & Hydraulics
| NID Storage | 170 acre-ft |
| Max Storage | 170 acre-ft |
| Normal Storage | 67 acre-ft |
| Surface Area | 11 acres |
| Max Discharge | 700 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Fort Sill |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 10/24/2019 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | OK20505 |
| Federal ID | OK20505 |
| More Info | State Dam Safety Program |