PSMBP - Angostura Unit Water Data


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PSMBP - Angostura Unit
Water Data

PSMBP - Angostura Unit - Main Page

Project Water Supply

Current Conditions:

Reservoir Storage

Angostura Reservoir

Weather Conditions (NOAA)

Custer, South Dakota

Edgemont, South Dakota

Streamflow

Cheyenne River below Angustora Dam, South Dakota (USGS)
Cheyenne River at Wasta, South Dakota (USGS)

Drought Index

Palmer Drought Index Map
Explanation of Palmer Drought Severity Index (Text)

Historic Conditions:

Annual Precipitation

Normal	17.13 in
Maximum - 1993	25.66 in
Minimum - 1985	11.53 in
Hot Springs, South Dakota 1961-1993

Temperature

Mean Annual	48 °F
Daily Maximum - 07/10/1933	112 °F
Daily Minimum - 01/11/1909	-41 °F
Hot Springs, South Dakota 1908-1996
Growing Season	132 days
Elevation of irrigable area	3,100 ft

Cheyenne River

Drainage area above Angostura Dam	9,100 mi²
Annual discharge
Maximum - 1962	292,851 acre-ft
Minimum - 1989	420 acre-ft
Average - 1945-1996	46,427 acre-ft

Project Water Quality

Angostura Reservoir
Middle Cheyenne - Spring

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