STS Engineers were hired by the City of Bristol to convert a 8,000,000 CY former limestone rock quarry into municipal waste landfill. . . . more about the Bristol Quarry Balefill After a sand and gravel mine was filled with random soils of different types, STS engineers worked together with the client to stabilize the grounds for construction of roads, buildings, and parking lots for a buisnesses. . . . more about the Cantera Quarry Redevelopment     This site, including all photos and content, © 1998 STS Consultants Ltd.