US Bridges

HWY W Fourth ST over Comb Fndry St&mbta&amtk

Fair

Suffolk County, Massachusetts · 1.6 KM SE of JCT I93&90 · Structure no. B161263FHDOTNBI

Built
1893
132 years old, rebuilt 1990
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
523 ft
7 main spans
Daily traffic
14,700
2024 count
Owner
State
State Highway Agency

About this bridge

HWY W Fourth ST over Comb Fndry St&mbta&amtk is a steel continuous stringer/multi-beam or girder carrying HWY W Fourth ST over Comb Fndry St&mbta&amtk in Suffolk County, Massachusetts. It was built in 1893 and reconstructed in 1990, so it is 132 years old, older than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 14,700 vehicles a day, roughly 9% of them trucks, projected to reach 34,113 by 2031. The structure is 523 ft (159.4 m) long and 59 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesHWY W Fourth ST
CrossesComb Fndry St&mbta&amtk
Location1.6 KM SE of JCT I93&90
RouteCity Street 0
Coordinates42.34236, -71.06001
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.4 US tons
Inventory rating45.2 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length523 ft (159.4 m)
Longest span86 ft (26.2 m)
Deck width59 ft (17.9 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,700 (2024)
Projected traffic34,113 by 2031
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$13.4 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY W Fourth ST over Comb Fndry St&mbta&amtk built?

It was built in 1893, making it 132 years old in 2025. It was reconstructed in 1990.

What condition is HWY W Fourth ST over Comb Fndry St&mbta&amtk in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2024.

How much traffic does HWY W Fourth ST over Comb Fndry St&mbta&amtk carry?

About 14,700 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is HWY W Fourth ST over Comb Fndry St&mbta&amtk?

The structure is 523 ft (159.4 m) long with a longest span of 86 ft (26.2 m) and a deck 59 ft wide.

Who owns HWY W Fourth ST over Comb Fndry St&mbta&amtk?

It is owned by the State Highway Agency.