As the number of settlers in the Tappen Valley grew, so did demand for consumer commodities. In the early 1900s, settlers in the Tappen Valley organized the Tappen Farmers' Exchange to facilitate the sale of their produce and purchase supplies. In 1907, Henry Banks built a store on the CPR right-of-way, but his business was impacted by the growth of the Tappen Farmers' Exchange. When the Exchange offered to buy his store, he agreed to the sale and it was at this point that the Cooperative Granite Trading Company came into being June 4th, 1915. The Cooperative Granite Trading Company's founding directors were Charles Mobley, Henry Calhoun, William Sanderson, Gus Annala and James A. Carlin. The assets of the CGTA fluctuated with the ups and downs of the economy of the country. On June 4th, 2000, the CoOperative Granite Trading Association (Tappen Co-Op) celebrated 85 years of service to the community.