Established in 1914, Boston Sand & Gravel operates in the ready-mixed concrete and aggregate industries. Its projects have included work on tunnels, wastewater treatment plants, nuclear power plants, high-rise buildings and slurry walls. The company s fleet of more than 250 mixer trucks allows it to work on mass pours of nearly any size. Boston Sand & Gravel is based in Boston and operates manufacturing plants throughout Massachusetts and New Hampshire. It also owns a subsidiary, Northcoast Railroad, which is a short-line railroad that delivers Boston Sand & Gravel s materials. The company is affiliated with the American Concrete Institute and the National Association of Home Builders.