IEC Dakotas, Inc. MAILING ADDRESS PO Box 2758 Sioux Falls, SD 57101 CLASSROOM/OFFICE 801 W. Blackhawk Street Sioux Falls, SD 57104 Voice: 605-271-0395 Get Directions From To Add Waypoint For Driving Walking Transit Bicycling show options hide options Avoid Tolls Avoid Highways Avoid Ferries Print directions Reset directions Fetching directions...... Reset directions Print directions