US Bridges

ST140 W Central ST over Comb MBTA & Mine Brook

Fair

Norfolk County, Massachusetts · .2 Miles West of I - 495 · Structure no. F08031ANXDOTNBI

Built
2006
19 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
575 ft
3 main spans
Daily traffic
29,448
2022 count
Owner
State
State Highway Agency

About this bridge

ST140 W Central ST over Comb MBTA & Mine Brook is a steel continuous stringer/multi-beam or girder carrying ST140 W Central ST over Comb MBTA & Mine Brook in Norfolk County, Massachusetts. It was built in 2006, so it is 19 years old, younger 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 6 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 29,448 vehicles a day, roughly 5% of them trucks, projected to reach 22,900 by 2031. The structure is 575 ft (175.3 m) long and 71 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesST140 W Central ST
CrossesComb MBTA & Mine Brook
Location.2 Miles West of I - 495
RouteCity Street 0
CountyNorfolk County
StateMassachusetts
Coordinates42.08914, -71.43202
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating71.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length575 ft (175.3 m)
Longest span183 ft (55.8 m)
Deck width71 ft (21.6 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,448 (2022)
Projected traffic22,900 by 2031
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$5.8 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST140 W Central ST over Comb MBTA & Mine Brook built?

It was built in 2006, making it 19 years old in 2025.

What condition is ST140 W Central ST over Comb MBTA & Mine Brook 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 April 2024.

How much traffic does ST140 W Central ST over Comb MBTA & Mine Brook carry?

About 29,448 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is ST140 W Central ST over Comb MBTA & Mine Brook?

The structure is 575 ft (175.3 m) long with a longest span of 183 ft (55.8 m) and a deck 71 ft wide.

Who owns ST140 W Central ST over Comb MBTA & Mine Brook?

It is owned by the State Highway Agency.