ADOT and the historic mining Town of Bisbee have requested EEC design a sidewalk that connects the Copper Queen Mine Tour with the scenic Lavender Pit Overlook. NCS provided a field and laboratory investigation, and recommendations for a "retaining wall" required on a portion of this project. As a result of extremely corrosive conditions, steep slope geometry in front of the wall and other factors, a concept was recommended involving supporting the sidewalk on columns socketed into rock as opposed to constructing a conventional retaining wall.