In the late 1970’s, the company expanded into the white calcium carbonate market, extending its product line to now serve almost all needs for various sizing of calcium carbonate for industry and agriculture from its centrally located plant in Seattle. The company ships bulk and sacked product by rail and truck throughout the Northwest and beyond. It is still a family owned company, but now much larger and offering a much wider array of products. Like many family owned companies, they offer personalized customer service. They also still supply the highest available calcium carbonate product available, which has served its customers for over sixty years.
In 2015 J.A. Jack was purchased by ACG Materials and continues its exemplary level of customer service providing limestone products throughout the Pacific Northwest.