Rolls Helen B
Key Takeaway
Rolls Helen B is classified as low hazard in Oklahoma. It was completed in 1950 and is 76 years old. Its primary use is other.
Physical Details
| Dam Height | 35 ft (taller than 72.5% in OK) |
| Dam Length | 360 ft |
| Dam Type | Earth |
| Max Storage | 210 acre-ft |
| Normal Storage | 20 acre-ft |
| Surface Area | 4 acres |
| Max Discharge | 2,700 cfs |
| Year Completed | 1950 (76 years old) |
| NID ID | OK12922 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
BILLIE W SMITH
Private
Nearby Dams
Oknoname 137063
Stephens, OK
Low Hazard 20 ftFredrick J.C.
Stephens, OK
Low Hazard 25 ftOknoname 051059
Grady, OK
Low Hazard 30 ftFrederick J.E.
Stephens, OK
Low Hazard 26 ftOknoname 051058
Grady, OK
Low Hazard 35 ftNunley W.E.
Stephens, OK
Low Hazard 30 ftCox Richard
Comanche, OK
Low Hazard 29 ftNunley W.E.
Stephens, OK
Low Hazard 30 ftFrequently Asked Questions
What is the hazard classification of Rolls Helen B?
Rolls Helen B is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Rolls Helen B?
Rolls Helen B is owned by BILLIE W SMITH (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Rolls Helen B built?
Rolls Helen B was completed in 1950, making it 76 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Rolls Helen B?
Rolls Helen B serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Rolls Helen B?
Rolls Helen B has a dam height of 35 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Rolls Helen B last inspected?
Rolls Helen B was last inspected on August 31, 2010. Inspection dates indicate when a formal review occurred, not the results of that inspection.