Sammons
Key Takeaway
Sammons is classified as low hazard in South Dakota. It was completed in 1967 and is 59 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 21 ft (taller than 40.7% in SD) |
| Dam Length | 1,480 ft |
| Dam Type | Earth |
| Max Storage | 541 acre-ft |
| Normal Storage | 352 acre-ft |
| Max Discharge | 6,000 cfs |
| Year Completed | 1967 (59 years old) |
| NID ID | SD00504 |
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
J.B. SAMMONS
Private
Nearby Dams
Sammons No.2
Ziebach, SD
Low Hazard 27 ftTribe No.4
Ziebach, SD
Low Hazard 28 ftB. Silverman Dam
Ziebach, SD
Low Hazard 21 ftMraz Bros
Ziebach, SD
Low Hazard 27 ftM. Mraz
Ziebach, SD
Low Hazard 22 ftJohnson
Ziebach, SD
Low Hazard 21 ftC. Mraz
Ziebach, SD
Low Hazard 13 ftO. Jewett
Dewey, SD
Low Hazard 19 ftFrequently Asked Questions
What is the hazard classification of Sammons?
Sammons 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 Sammons?
Sammons is owned by J.B. SAMMONS (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Sammons built?
Sammons was completed in 1967, making it 59 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 Sammons?
Sammons serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Sammons?
Sammons has a dam height of 21 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.