N.P.A., a division of Colas Western Canada Inc., one of Western Canada's largest paving and construction materials contractors, offers products and services throughout Alberta, Saskatchewan, and the Northwest Territories through a network of local companies:   E CONSTRUCTION - One of Western Canada's largest paving contractors throughout Alberta, Saskatchewan and the NWT. Highly mobile with the most modern fleet in the business and more asphalt plants than any other paving contractor in Alberta, we are cost-competitive in almost any market in the province.   WAPITI GRAVEL SUPPLIERS – The largest general highway contractor in Grande Prairie and northwestern Alberta since 1961. Their primary focus is on constructing highways, roads, parking lots and driveways, as well as the sale of aggregate materials for all types of construction and maintenance.   G&C ASPHALT - Provides Road and Site Construction and Maintenance, Aggregate Supply and Testing in North Battleford and surrounding Saskatchewan. We use only quality materials and follow proper processes to ensure our work meets not only regulatory standards but also our own high standards of quality.