2019-2020+ In-River Construction

The in-river portion of the U.S. Environmental Protection Agency (EPA) selected remedy for the lower Grasse River began in 2019. The overall goal of the project is to reduce polychlorinated biphenyl (PCB) levels in fish and other organisms in the river for the long-term protection of human health and the environment. The remedy was issued in EPA's 2013 Record of Decision, and includes:

  • Removal of targeted sediment from near shore areas of the river followed by the placement of clean backfill
  • Placement of an armored cap in the main channel of the river between the Alcoa Bridge and the Route 131 Bridge
  • Placement of a sand cap in the main channel of the river between the Route 131 Bridge and the confluence with the St. Lawrence River
  • Excavation of targeted floodplain soil and backfilling with clean soil
  • Habitat-related reconstruction work

Arconic has selected J.F. Brennan as the contractor to implement the design plan. The in-river work is expected to take 3 to 4 years with work starting in April and continuing through November each year (weather pending). Details on the 2019 and 2020 construction activities are provided under "What's New".