Keewaydin Island

Velocity provided geotechnical engineering services to assess the subsurface soil conditions for a new 2,200-square-foot single-family residence on Keewaydin Island, located in south Collier County.  There are no roads to Keewaydin, and it is accessible only by barge during high tide. Additionally, presenting additional challenges were the fact that this area is in a VE Flood Zone, which is considered high risk for flooding, and is seaward of the Coastal Construction Control Line (CCCL), requiring protection of the beach and dune systems.

Our team developed a comprehensive plan and coordinated the mobilization of Velocity’s truck-mounted drill rig and support vehicle to the island’s south end. 

Over a two-day period, our engineers and drill crew conducted the geotechnical exploration, which included five Standard Penetration Test borings within the building footprint, totaling approximately 225 linear feet of drilling. Our team camped on the island overnight and completed the work in time to be picked up at high tide the following day.

Following the field exploration, Velocity’s engineers classified the soil samples recovered, evaluated the subsurface soil conditions, and provided recommendations for a deep foundation system.