PSMBP - Rapid Valley Unit Water Data


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PSMBP - Rapid Valley Unit
Water Data

PSMBP - Rapid Valley Unit - Main Page

Project Water Supply

Current Conditions:

Reservoir Storage

Major Reservoirs in the Rapid Creek Basin (Teacup Diagram)
Pactola Reservoir

Weather Conditions (NOAA)

Streamflow

Rapid Creek above Pactola Reservoir at Silver City, South Dakota (USGS)
Rapid Creek above Canyon Lake, near Rapid City, South Dakota (USGS)

Drought Index

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

Historic Conditions:

Annual Precipitation

Normal	16.15 in
Maximum - 1982	25.97 in
Minimum - 1974	9.12 in
Rapid City, South Dakota 1961-1990

Temperature

Mean Annual	46.8 °F
Daily Maximum - 07/06/1973	110 °F
Daily Minimum - 02/02/1996	-31 °F
Rapid City, South Dakota 1961-1996
Growing Season	150 days
Elevation of irrigable area	3,000 ft

Rapid Creek

Drainage area above Pactola Dam	292 mi²
Annual discharge:
Maximum - 1965	68,719 acre-ft
Minimum - 1961	9,237 acre-ft
Average - 1953-1996	30,469 acre-ft

Project Water Quality

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