The Port of Miami Tunnel Project consisted of the widening of the MacArthur Causeway Bridge, two 42-foot diameter tunnel connections approximately 3,900 feet long between Watson Island and Dodge Island (Port of Miami), and connections to the Miami roadway system. KEITH provided surveying services for establishment of the Primary Horizontal and Vertical Control Network on Dodge Island. KEITH also provided a detailed topographic survey, including preparation of Digital Terrain Model (DTM) of the entire work area. The scope of service further required surveying services to locate utilities, in conjunction with subsurface utility engineering (SUE). Lastly, KEITH provided precise horizontal and vertical locations for the underground utilities in the area of the proposed tunneling on the Watson Island side of the tunnel, sweeping the site with ground penetrating radar for potential unknown subsurface utilities.