The total cost is $4.5 billion. About $2.42 billion is locked in for the Sagamore. The Bourne replacement, at $2.37 billion, is not yet fully funded. None of the money comes from local Cape budgets. This is a state and federal project.
The big picture
- Total cost: $4.5 billion across both bridges.
- Sagamore: $2.13 billion. Fully funded.
- Bourne: $2.37 billion. Partly funded. The rest is pending federal grant decisions.
Where the Sagamore money comes from
- $1.72 billion from a federal grant. That came under the Bipartisan Infrastructure Law passed in 2021.
- $700 million from Massachusetts, in the state’s 2026 to 2030 capital investment plan.
- Together that covers the full Sagamore replacement. No gaps.
Where the Bourne money is coming from, and where it’s stuck
Massachusetts is asking the federal government for additional grant money to cover most of the Bourne. That decision is expected in 2027.
The state share will be sized to match the federal share once decided. Until that grant decision lands, the Bourne is fully designed but only partly funded.
Why isn’t the Cape paying?
The bridges are owned by the U.S. Army Corps of Engineers, a federal agency. The bridges sit on federal land. The canal itself is federal too.
The roads connecting the bridges are state highways (Route 6 and Route 28), so MassDOT manages them.
Local towns (Bourne, Sandwich, Sagamore Beach) pay for their own local roads, schools and services. They don’t pay anything toward the bridge replacement.
What happens if the Bourne grant doesn’t come through?
Massachusetts has said the project moves forward either way. Funding gets restructured if needed. A delay is possible if the federal share is much smaller than expected.
We’ll cover the Bourne grant decision as soon as it lands.
For the current funding picture and the rest of the project status, see the Project Tracker. For the deeper story on the rebuild, see The Cape Cod Bridges Replacement, Explained.