Matter
Key Takeaway
Matter is classified as low hazard in South Dakota. It was completed in 1938 and is 88 years old. Its primary use is recreation.
Physical Details
| Dam Height | 18 ft (taller than 24.1% in SD) |
| Dam Length | 590 ft |
| Dam Type | Earth |
| Max Storage | 335 acre-ft |
| Normal Storage | 104 acre-ft |
| Max Discharge | 1,600 cfs |
| Year Completed | 1938 (88 years old) |
| NID ID | SD00312 |
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
MATTER
Private
Nearby Dams
Tribe No.11
Ziebach, SD
Low Hazard 28 ftTribe No.3
Ziebach, SD
Low Hazard 20 ftHulm
Ziebach, SD
Low Hazard 18 ftCarmichael
Ziebach, SD
Low Hazard 19 ftK. Dorsey No.1
Ziebach, SD
Low Hazard 22 ftM. Matthews
Ziebach, SD
Low Hazard 26 ftK. Dorsey No.2
Ziebach, SD
Low Hazard 22 ftGlad Valley
Ziebach, SD
Low Hazard 18 ftFrequently Asked Questions
What is the hazard classification of Matter?
Matter 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 Matter?
Matter is owned by MATTER (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Matter built?
Matter was completed in 1938, making it 88 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 Matter?
Matter serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Matter?
Matter has a dam height of 18 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.