J-m Ranch is an earth dam located in Oklahoma County, Oklahoma, built in 1970. It carries a Low hazard potential classification.
Dam profile
NID height · 22 ft22 ft tall and 800 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 J-m Ranch
J-m Ranch is a dam in Oklahoma, Oklahoma. The dam is owned by Mulholland HOA Inc (private). It impounds the Tributary of Chishom Creek near Oklahoma City.
The dam stands 22 feet tall and stretches 800 feet across, creates a reservoir covering 30 acres, and has a maximum storage capacity of 300 acre-feet. Completed in 1970, 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 12/20/2010. That was over 15 years ago.
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Location
| State | Oklahoma |
| County | Oklahoma |
| Nearest City | Oklahoma City |
| River/Stream | Tributary of Chishom Creek |
| Coordinates | 35.66671, -97.54204 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 800 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 300 acre-ft |
| Max Storage | 300 acre-ft |
| Normal Storage | 200 acre-ft |
| Surface Area | 30 acres |
| Max Discharge | 780 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Other |
| Owner | Mulholland HOA Inc |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 12/20/2010 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OK12194 |
| Federal ID | OK12194 |
| More Info | State Dam Safety Program |