US Bridges

HWY Bellnghm ST over RR MBTA Silver Line

Good

Suffolk County, Massachusetts · 2.4 KM S of JCT US1&SR16 · Structure no. C090033FNDOT634

Built
1993
32 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
60 ft
1 main span
Daily traffic
3,100
2024 count
Owner
State
State Highway Agency

About this bridge

HWY Bellnghm ST over RR MBTA Silver Line is a steel stringer/multi-beam or girder carrying HWY Bellnghm ST over RR MBTA Silver Line in Suffolk County, Massachusetts. It was built in 1993, so it is 32 years old, younger than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,100 vehicles a day, roughly 4% of them trucks, projected to reach 3,790 by 2033. The structure is 60 ft (18.4 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesHWY Bellnghm ST
CrossesRR MBTA Silver Line
Location2.4 KM S of JCT US1&SR16
RouteCity Street 0
Coordinates42.39055, -71.02507
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.7 US tons
Inventory rating39.5 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length60 ft (18.4 m)
Longest span55 ft (16.9 m)
Deck width43 ft (13 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,100 (2024)
Projected traffic3,790 by 2033
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$2.2 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Bellnghm ST over RR MBTA Silver Line built?

It was built in 1993, making it 32 years old in 2025.

What condition is HWY Bellnghm ST over RR MBTA Silver Line in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2024.

How much traffic does HWY Bellnghm ST over RR MBTA Silver Line carry?

About 3,100 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is HWY Bellnghm ST over RR MBTA Silver Line?

The structure is 60 ft (18.4 m) long with a longest span of 55 ft (16.9 m) and a deck 43 ft wide.

Who owns HWY Bellnghm ST over RR MBTA Silver Line?

It is owned by the State Highway Agency.