Downs #9-206-7 Dam is an earth dam built on the L. Downs Draw River and is located in Edgemont SD, Wyoming. It was built in 1967 for the purpose of fire protection / stock / small fish pond.
The dam is under federal ownership and is owned by the USDA FS. It is also known as 206W06. The dam used to be known as L.Downs.
Downs #9-206-7 Dam is under federal ownership and is owned by the USDA FS.
|Dam length||331 feet|
|Dam height||20 feet|
|Hydraulic height||15 feet|
|Max discharge||108 cubic feet per second|
|Max storage||91 acre feet|
|Surface area||2 acres|
Length of the dam is defined as the length along the top of the dam. This also includes the spillway, powerplant, navigation lock, fish pass, etc., where these form part of the length of the dam. If detached from the dam, these structures should not be included.
Height of the dam is defined as the vertical distance between the lowest point on the crest of the dam and the lowest point in the original streambed.
Hydraulic height of the dam is defined as the vertical difference between the maximum design water level and the lowest point in the original streambed.
Number of cubic feet per second the spillway is capable of discharging when the reservoir is at its maximum designed water surface elevation.
Maximum storage is defined as the total storage space in a reservoir below the maximum attainable water surface elevation, including any surcharge storage.
Surface area, in acres, of the impoundment at its normal retention level.
Dams assigned the low hazard potential classification are those where failure or misoperation results in no probable loss of human life and low economic and/or environ-mental losses. Losses are principally limited to the owner’s property.
An emergency action plan is defined as a plan of action to be taken to reduce the potential for property damage and loss of life in an area affected by a dam failure or large flood.
Inspections are every 10 years.
|Also known as||206W06|
|Distance to nearest town (miles)||87|
|NID ID (National ID)||WY02574|