Dataset contains locations of subsurface drainage (tile) permits in South Dakota obtained from County and Local Water Board records in South Dakota. The counties included in this dataset are: Brown, Deuel, Grant, Hamlin, Hanson, Kingsbury, Lake, McCook, Minnehaha, Moody, Roberts, Spink, and Turner. The date permits records were collected by this survey vary by county. Other counties in the eastern portion of the state not included in the preceeding list of counties either did not require a drainage permit or permit data was not available at the time of this survey. A majority of permits were collected as of January 2012. Two counties (Hanson and Minnehaha) were updated in December,2013. The permit location (in aTRS format) and information about the drainage infrastruture (e.g., pipe diameter, depth) as recorded on the permit is given, if available. This dataset provides the latitude, longitude, and polygon outline of the location given on the permit, which is not typically provided on the permit application or record. Overlap of permit polygons (if depicted in a geospatial application) is possible from two permits that share the same area. Permit applications that were: denied, applied to small tracts of homes (home drainage systems), residential subdivisions, ditches, maintenance, or had incomplete TRS information were not included in this dataset.
