Cottonwood
Cottonwood is an earth dam located in Johnston County, Oklahoma, built in 1964. It carries a Low hazard potential classification.
About Cottonwood
The primary purpose of Cottonwood 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 Doi Fws (federal). It impounds the Tr-pennington Creek near Lake Texoma.
The dam stands 15 feet tall and stretches 500 feet across, creates a reservoir covering 18 acres, and has a maximum storage capacity of 50 acre-feet. Completed in 1964, 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.
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Location
| State | Oklahoma |
| County | Johnston |
| Nearest City | Lake Texoma |
| River/Stream | Tr-pennington Creek |
| Coordinates | 34.19951, -96.66773 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 500 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 50 acre-ft |
| Max Storage | 50 acre-ft |
| Normal Storage | 20 acre-ft |
| Surface Area | 18 acres |
| Max Discharge | 500 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | DOI FWS |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 01/01/1980 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OK21281 |
| Federal ID | OK21281 |
| More Info | State Dam Safety Program |