Deer Isle causeways to be raised 4 feet to withstand storm surge

BANGOR DAILY NEWS • June 8, 2026

The state revealed Monday that it plans to raise the Deer Isle Causeway 4.3 feet higher to better withstand sea level rise and strong coastal storms. Under the proposal, nearly a mile of the main causeway connecting Deer Isle-Stonington to Little Deer Isle and another, smaller one near the base of the Deer Isle-Sedgwick Bridge would be improved through a $22 million, two-year project. The new elevation is “practical, feasible and responsive for the next 75-plus years,” according to the Maine Department of Transportation — several feet above predicted sea level rise by the end of the century.