Civil Engineering go Results Found: 3 Button group with nested dropdown Gold Stockwell Engineers Inc. 801 N. Phillips Ave Suite 100 Sioux Falls SD 57104 (605) 338-6668 Gold Infrastructure Design Group, Inc. 116 W. 69th Street Sioux Falls SD 57108 (605) 271-5527 DGR Engineering Bronze DGR Engineering 1300 S Highline Avenue Sioux Falls SD 57110 (605) 339-4157