Coastline attempts to recreate the effect of waves crashing on the Atlantic coast (represented by rough-cut granite). This is achieved with artificial waves generated by a turbine and pneumatic blower underneath the sculpture. The wave frequency is controlled by a remote tide gauge in Woods Hole, Massachusetts, that sends actual wave heights to the sculpture's control mechanism in real time. Sanborn built a quarter-size scale model of the sculpture and consulted with a wave engineer while doing research for the project.