G&J Heck No.1
Key Takeaway
G&J Heck No.1 is classified as low hazard in South Dakota. It was completed in 1937 and is 89 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 15 ft (taller than 11.1% in SD) |
| Dam Length | 475 ft |
| Dam Type | Earth |
| Max Storage | 90 acre-ft |
| Normal Storage | 40 acre-ft |
| Max Discharge | 3,150 cfs |
| Year Completed | 1937 (89 years old) |
| NID ID | SD00235 |
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
G&J HECK
Private
Nearby Dams
G&J Heck No.2
Dewey, SD
Low Hazard 25 ftBrooks Dam
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Low Hazard 23 ftD. Woddell
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Low Hazard 24 ftG & J Heck No.2
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Low Hazard 25 ftR. Clark No.1
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Low Hazard 19 ftR. Clark No.2
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Low Hazard 12 ftR. Clark No.3
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Low Hazard 11 ftG. Boldt
Dewey, SD
Low Hazard 18 ftFrequently Asked Questions
What is the hazard classification of G&J Heck No.1?
G&J Heck No.1 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 G&J Heck No.1?
G&J Heck No.1 is owned by G&J HECK (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was G&J Heck No.1 built?
G&J Heck No.1 was completed in 1937, making it 89 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 G&J Heck No.1?
G&J Heck No.1 serves the following purposes: Fire Protection, Stock, Or Small Fish Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is G&J Heck No.1?
G&J Heck No.1 has a dam height of 15 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.