Harden No 1 is an earth dam located in Le Flore County, Oklahoma, built in 1975. It carries a Low hazard potential classification.
Dam profile
NID height · 42 ft42 ft tall and 575 ft long, taller than 88% 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 Harden No 1
The primary purpose of Harden No 1 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 Carl & Sue Werschky (private). It impounds the Tr-james Fork Creek near Rock Island.
The dam stands 42 feet tall and stretches 575 feet across, and has a maximum storage capacity of 554 acre-feet. Completed in 1975, 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 12/01/2010. That was over 15 years ago.
At 42 feet, this dam is taller than 88% of dams nationwide.
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Location
| State | Oklahoma |
| County | Le Flore |
| Nearest City | Rock Island |
| River/Stream | Tr-james Fork Creek |
| Coordinates | 35.20652, -94.47393 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 42 ft |
| Dam Height | 42 ft |
| Dam Length | 575 ft |
| Year Completed | 1975 (51 years old) |
Storage & Hydraulics
| NID Storage | 554 acre-ft |
| Max Storage | 554 acre-ft |
| Normal Storage | 396 acre-ft |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Carl & Sue Werschky |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 12/01/2010 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OK21486 |
| Federal ID | OK21486 |
| More Info | State Dam Safety Program |