Feedlot Permit Program

Soil-Plant-Air-Water Weather Data

The 2017 general permit requires that facilities with open lots and/or uncovered manure management systems provide the results of the Soil-Plant-Air-Water (SPAW) modeling program. The program is a hydraulic model of the site that demonstrates that, when provided with site specific information and 100 years of weather data, demonstrates that, if properly designed, constructed, operated, and maintained, the facility would not have discharged from their manure management system in the 100 year timeframe. The modeling software may be obtained at the NRCS SPAW Website.

The following map identifies the weather reporting stations with 100 years of weather data that are available to be used with the SPAW model. The data was compiled by the South Dakota Natural Resource Conservation Service (SD-NRCS) and they will add additional stations as other stations meet the 100 year data requirement. Using the SPAW Map below, identify the closest weather station to your site, and download the corresponding data located below the map. The data provides maximum temperature, minimum temperature, and precipitation as available. Notes are provided in each file regarding any missing data.


Aberdeen  Academy 2NE   Alexandria   Belle Fourche   Bison   Britton   Brookings 2NE   Camp Cook   Canton   Centerville 6SE   Cottonwood 2E   DeSmet   Eureka   Faulkton   Flandreau   Forestburg 4NNE   Highmore 1W   Hot Springs   Howard   Huron   Kennebec   Lead   Lemmon   McIntosh 6SE   Mellette 4W   Menno   Miller   Murdo   Oelrichs   Pierre Regional Airport   Sioux Falls Airport   Spearfish   Tyndall   Vermillion 2SE   Watertown Airport   Wood

Questions? Please contact Troy Roth at (605) 773-4647.