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Lower Long Lake Dam
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Lower Long Lake Dam Share
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Overview Share
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Arvada, Colorado
Water Supply
Public utility owned
Built in 1939

Lower Long Lake Dam is an earth dam built on the Ralston Creek-Os River and is located in Arvada, Colorado. It was built in 1939 for the purpose of water supply.

The dam is owned by the public utility, Denver Board of Water Commissioners. It is also known as Long Lake NO 2, Campbell #2, Cambell Res.

Location
Lower Long Lake Dam
Arvada, Colorado, U.S.
Dam type
Earth
Dam type
Water supply
Purpose
Unknown
Foundation type
Unknown
Core type
Ownership Share
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Denver Board of Water Commissioners
Owner
Public utility

Lower Long Lake Dam is owned by the public utility, Denver Board of Water Commissioners.

Construction Share
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1939
Completed
Ralston Creek-Os River
River built on
Lower Long Lake Dam was built in 1939.
Metrics Share
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Summary
Dam length 1,350 feet
Dam height 19 feet
Structural height 19 feet
Hydraulic height 15 feet
Max discharge 330 cubic feet per second
Max storage 409 acre feet
Normal storage 292 acre feet
Surface area 30 acres
1,350 feet
Dam length

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.

19 feet
Dam height

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.

19 feet
Structural height

Structural height of the dam is defined as the vertical distance from the lowest point of the excavated foundation to the top of the dam. Top of dam refers to the parapet wall and not the crest.

15 feet
Hydraulic height

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.

330 cubic feet per second
Max discharge

Number of cubic feet per second the spillway is capable of discharging when the reservoir is at its maximum designed water surface elevation.

409 acre feet
Max storage

Maximum storage is defined as the total storage space in a reservoir below the maximum attainable water surface elevation, including any surcharge storage.

292 acre feet
Normal storage

Normal storage is defined as the total storage space in a reservoir below the normal retention level, including dead and inactive storage and excluding any flood control or surcharge storage. For normally dry flood control dams, the normal storage will be a zero value.

30 acres
Surface area

Surface area, in acres, of the impoundment at its normal retention level.

Safety Share
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High
Downstream potential hazard

Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.

Has emergency action plan
Emergency action plan

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.

5/9/2018
Most recent inspection date

Inspections are every 1 ear.

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Also known as Long Lake NO 2, Campbell #2, Cambell Res
Distance to nearest town (miles) 2
Latitude 39
Longitude -105
NID ID (National ID) CO01784

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