Westmoreland, Cabot announce activated carbon capacity expansion Westmoreland Coal Company (WLB) and Cabot Corporation (CBT) plan to increase activated carbon manufacturing capacity in North America. The joint venture partners plan to double the capacity of their Bienfait, Saskatchewan manufacturing facility to meet the future demand for mercury removal products for use in the coal-fired utility market. The jointly owned facility will produce an additional 35 million pounds of powdered activated carbon. The Bienfait plant will continue to be served from a co-located mine that is operated by Westmoreland. The additional capacity will be commissioned in 2016. The expansion will produce Cabotís benchmark DARCO Hg family of mercury removal products. Cabot will be responsible for the marketing of these products as well as the technology package, while Westmoreland continues to be the operator of the plant.