2024 Corporate Centre Dr., Ste. 102
Myrtle Beach, SC 29577

Grand Strand Water & Sewer Authority

GSWSA 1Grand Strand Water and Sewer Authority provides quality water and wastewater products and services to customers within Horry, Marion and Columbus counties.

Castles Engineering has worked with the GSW&SA on many aspects of different projects. 

Some public works projects include but are not limited to:

GSW&SA Bucksport Composting Facility

Castles Engineering designed to construct a regional wastewater sludge composting facility, inclusive of roadway, drainage and wetwell, to use the aerated static pile composting method capable of producing Class A execptional quality biosolids.