Black Hack Jr
Key Takeaway
Black Hack Jr is classified as low hazard in Oklahoma. It was completed in 1976 and is 50 years old. Its primary use is flood risk reduction.
Physical Details
| Dam Height | 30 ft (taller than 54.9% in OK) |
| Dam Length | 570 ft |
| Dam Type | Earth |
| Max Storage | 150 acre-ft |
| Normal Storage | 75 acre-ft |
| Max Discharge | 220 cfs |
| Year Completed | 1976 (50 years old) |
| NID ID | OK13136 |
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
JAMES C WALKER
Private
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Significant Hazard 35 ftFrequently Asked Questions
What is the hazard classification of Black Hack Jr?
Black Hack Jr 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 Black Hack Jr?
Black Hack Jr is owned by JAMES C WALKER (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Black Hack Jr built?
Black Hack Jr was completed in 1976, making it 50 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 Black Hack Jr?
Black Hack Jr serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Black Hack Jr?
Black Hack Jr has a dam height of 30 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 Black Hack Jr last inspected?
Black Hack Jr was last inspected on August 9, 2011. Inspection dates indicate when a formal review occurred, not the results of that inspection.