Mary No. 2
Key Takeaway
Mary No. 2 is classified as low hazard in Wyoming. It was completed in 1973 and is 53 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 22 ft (taller than 28.8% in WY) |
| Dam Length | 430 ft |
| Dam Type | Earth |
| Max Storage | 95 acre-ft |
| Normal Storage | 51 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1973 (53 years old) |
| NID ID | WY00601 |
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
AHT LAND LLC
Private
Nearby Dams
Kimberly
Johnson, WY
Low Hazard 29 ftMary Stock
Johnson, WY
Low Hazard 38 ftCheri L.
Johnson, WY
Low Hazard 31 ftJohn Stock
Johnson, WY
Low Hazard 25 ftMadonna
Johnson, WY
Low Hazard 29 ftEnl. Rocky Road
Johnson, WY
Low Hazard 32 ftBoulder Lane
Johnson, WY
Low Hazard 34 ftRough Ride
Johnson, WY
Low Hazard 31 ftFrequently Asked Questions
What is the hazard classification of Mary No. 2?
Mary No. 2 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 Mary No. 2?
Mary No. 2 is owned by AHT LAND LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mary No. 2 built?
Mary No. 2 was completed in 1973, making it 53 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 Mary No. 2?
Mary No. 2 serves the following purposes: Fire Protection, Stock, Or Small Fish Pond, Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Mary No. 2?
Mary No. 2 has a dam height of 22 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 Mary No. 2 last inspected?
Mary No. 2 was last inspected on July 8, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.