Forestry is one of the city's major industries, with several sawmills and paper plants in the vicinity, the largest being the Twin Rivers pulp mill, formerly owned by Fraser Papers, now owned by Norbord, by way of Noranda Forest (1998) and Nexfor (2004). The Edmundston pulp mill is paired with a Twin Rivers paper mill directly across the Saint John River in Madawaska, Maine, through which liquified pulp slurry is piped. The pulp is shipped across the border through a mile-long high pressure pipeline running between both facilities, and is made into paper in Madawaska. The Madawaska mill specializes in fine-grade papers. The town's economy is highly dependent upon cross-border trade, to the extent that Edmundston and its smaller sister city of Madawaska are considered by residents under many aspects, a single economic entity.