Arconic and Environmental Protection Agency officials estimate a five-year project to remediate pollution in the Grasse River caused by Alcoa. Arconic split from Alcoa in 2015. The portion of the Alcoa plant that is now Arconic leaked contaminants including polychlorinated biphenyls into the causeway that flowed downstream and polluted the Grasse River. The Grasse in that area empties into the St. Lawrence River below Snell Lock. Dan Casey from Arconic shows the Town Council a photo of what the site now looks like. North Country Now photo by Andy Gardner.