An environmental review process is underway, with the final report expected by winter 2025 and the federal environmental impact statement to be finalized in 2026.

While the current bridges are deemed safe for now, their nearing end of useful life and environmental issues necessitate a total project cost estimated at around $4.5 billion, addressing safety, tourism, and environmental concerns.

Funding for the Sagamore Bridge project includes approximately $1.3 billion from federal grants, $750 million from the state, and $350 million from the U.S. Army Corps of Engineers, with plans for the Bourne Bridge still under development.

The Sagamore Bridge, along with the neighboring Bourne Bridge, is being inspected and replaced due to their age and safety concerns, with both bridges nearing 90 years old and considered functionally obsolete.

Managed by the U.S. Army Corps of Engineers and MassDOT, these bridges are vital for over 38 million trips annually and serve as a crucial evacuation route for Cape Cod residents.

The replacement project for the Sagamore Bridge has secured approximately $2.3 billion in funding, reflecting its importance and the need to modernize the aging infrastructure.

Preliminary design plans include widening lanes from 10 to 12 feet, adding a 12-foot entry-exit lane, and upgrading sidewalks to a 14-foot shared-use path with a lookout to enhance safety and traffic flow.

Construction on the new bridges is anticipated to start within the next two years, with permitting expected to be completed by late 2026 and a notice to proceed likely by late 2027 or early 2028.

Eminent domain notices have been issued to property owners near the Sagamore Bridge to facilitate construction, raising concerns about potential home demolitions.

The replacement plans include building new bridges with two lanes in each direction, pedestrian and bike pathways, and possibly tolls to fund the project, especially for the Sagamore Bridge.