Sub-penitentiary Lake is an earth dam located in Atoka County, Oklahoma, built in 1940. It carries a Low hazard potential classification.
Dam profile
NID height · 40 ft40 ft tall and 795 ft long, taller than 86% 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 Sub-penitentiary Lake
The primary purpose of Sub-penitentiary Lake is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by State of Oklahoma (state). It impounds the Elm Crk. near Flora.
The dam stands 40 feet tall and stretches 795 feet across, creates a reservoir covering 90 acres, and has a maximum storage capacity of 933 acre-feet. Completed in 1940, 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. The most recent inspection on record was 11/20/2005. That was over 20 years ago.
At 40 feet, this dam is taller than 86% of dams nationwide.
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Location
| State | Oklahoma |
| County | Atoka |
| Nearest City | Flora |
| River/Stream | Elm Crk. |
| Coordinates | 34.52110, -96.02788 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Height | 40 ft |
| Dam Length | 795 ft |
| Year Completed | 1940 (86 years old) |
Storage & Hydraulics
| NID Storage | 933 acre-ft |
| Max Storage | 933 acre-ft |
| Normal Storage | 840 acre-ft |
| Surface Area | 90 acres |
| Max Discharge | 1,934 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | State of Oklahoma |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 11/20/2005 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OK00110 |
| Federal ID | OK00110 |
| More Info | State Dam Safety Program |