Johnson is an earth dam located in Ellis County, Oklahoma, built in 1978. It carries a Low hazard potential classification.
Dam profile
NID height · 34 ft34 ft tall and 589 ft long, taller than 78% 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 Johnson
Johnson is a dam in Ellis, Oklahoma. The dam is owned by Jerry and Jacqualyn Johnson (private). It impounds the Tr-canadian near Roll.
The dam stands 34 feet tall and stretches 589 feet across, and has a maximum storage capacity of 60 acre-feet. Completed in 1978, the structure is 48 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 12/14/2010. That was over 15 years ago.
At 34 feet, this dam is taller than 78% of dams nationwide.
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Location
| State | Oklahoma |
| County | Ellis |
| Nearest City | Roll |
| River/Stream | Tr-canadian |
| Coordinates | 35.98508, -99.77866 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 34 ft |
| Dam Height | 34 ft |
| Dam Length | 589 ft |
| Year Completed | 1978 (48 years old) |
Storage & Hydraulics
| NID Storage | 60 acre-ft |
| Max Storage | 60 acre-ft |
| Normal Storage | 30 acre-ft |
| Max Discharge | 2,700 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Other |
| Owner | Jerry and Jacqualyn Johnson |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 12/14/2010 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OK20883 |
| Federal ID | OK20883 |
| More Info | State Dam Safety Program |