National Properties Inc is an earth dam located in Cleveland County, Oklahoma, built in 1960. It carries a Low hazard potential classification.
Dam profile
NID height · 16 ft16 ft tall and 740 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 National Properties Inc
National Properties Inc is a dam in Cleveland, Oklahoma. The dam is owned by Royal Oaks Home Owners Association (private). It impounds the Tr-rock Creek near Norman.
The dam stands 16 feet tall and stretches 740 feet across, creates a reservoir covering 13 acres, and has a maximum storage capacity of 100 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 08/24/2010. That was over 16 years ago.
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Location
| State | Oklahoma |
| County | Cleveland |
| Nearest City | Norman |
| River/Stream | Tr-rock Creek |
| Coordinates | 35.22475, -97.40173 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 740 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 100 acre-ft |
| Max Storage | 100 acre-ft |
| Normal Storage | 55 acre-ft |
| Surface Area | 13 acres |
| Max Discharge | 1,100 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Other |
| Owner | Royal Oaks Home Owners Association |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 08/24/2010 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OK12575 |
| Federal ID | OK12575 |
| More Info | State Dam Safety Program |