Simpson Cc is an earth dam located in McClain County, Oklahoma, built in 1960. It carries a Low hazard potential classification.
Dam profile
NID height · 29 ft29 ft tall and 720 ft long, taller than 65% 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 Simpson Cc
Simpson Cc is a dam in McClain, Oklahoma. The dam is owned by Mary Lou Gill-girard (private). It impounds the Tr-canadian River near Norman.
The dam stands 29 feet tall and stretches 720 feet across, creates a reservoir covering 4 acres, and has a maximum storage capacity of 309 acre-feet. Completed in 1960, 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 07/25/2005. That was over 21 years ago.
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Location
| State | Oklahoma |
| County | McClain |
| Nearest City | Norman |
| River/Stream | Tr-canadian River |
| Coordinates | 35.28982, -97.65866 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 720 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 309 acre-ft |
| Max Storage | 309 acre-ft |
| Normal Storage | 77 acre-ft |
| Surface Area | 4 acres |
| Max Discharge | 1,764 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Other |
| Owner | Mary Lou Gill-girard |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 07/25/2005 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OK12448 |
| Federal ID | OK12448 |
| More Info | State Dam Safety Program |