HWY River ST over RR Amtrak/Mbta
PoorClosed to trafficSuffolk County, Massachusetts · .8 KM SW of Mattapan Sq. · Structure no. B161093H8DOT634
- Built
- 1883
- 142 years old, rebuilt 1990
- Condition
- Poor
- inspected November 2023
- Type
- Truss - Thru
- Steel
- Length
- 82 ft
- 1 main span
- Daily traffic
- 24,000
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
HWY River ST over RR Amtrak/Mbta is a steel truss - thru carrying HWY River ST over RR Amtrak/Mbta in Suffolk County, Massachusetts. It was built in 1883 and reconstructed in 1990, so it is 142 years old, older than the Massachusetts average of 63.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 2 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.
It carries about 24,000 vehicles a day, roughly 7% of them trucks, projected to reach 40,588 by 2032. The structure is 82 ft (25 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 2 Critical | Advanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was HWY River ST over RR Amtrak/Mbta built?
It was built in 1883, making it 142 years old in 2025. It was reconstructed in 1990.
What condition is HWY River ST over RR Amtrak/Mbta in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2023.
How much traffic does HWY River ST over RR Amtrak/Mbta carry?
About 24,000 vehicles per day (2019 count), of which roughly 7% are trucks.
How long is HWY River ST over RR Amtrak/Mbta?
The structure is 82 ft (25 m) long with a longest span of 76 ft (23.2 m) and a deck 52 ft wide.
Who owns HWY River ST over RR Amtrak/Mbta?
It is owned by the State Highway Agency.