US Bridges

HWY Tremont ST over Comb Amtrak/Mbta & Orng

Fair

Suffolk County, Massachusetts · 2nd Br S of Ruggles ST · Structure no. B160924VAMBTNBI

Built
1981
44 years old
Condition
Fair
inspected September 2022
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
125 ft
2 main spans
Daily traffic
22,250
2022 count
Owner
State
Other State Agency

About this bridge

HWY Tremont ST over Comb Amtrak/Mbta & Orng is a prestressed concrete box beam or girders - single or spread carrying HWY Tremont ST over Comb Amtrak/Mbta & Orng in Suffolk County, Massachusetts. It was built in 1981, so it is 44 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 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 22,250 vehicles a day, roughly 11% of them trucks, projected to reach 14,056 by 2031. The structure is 125 ft (38 m) long and 86 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHWY Tremont ST
CrossesComb Amtrak/Mbta & Orng
Location2nd Br S of Ruggles ST
RouteCity Street 0
CountySuffolk County
StateMassachusetts
Coordinates42.33155, -71.0952
Functional classUrban Minor 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment2: Basically intolerable, requiring high priority of replacement
Operating rating76.9 US tons
Inventory rating45.1 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length125 ft (38 m)
Longest span64 ft (19.6 m)
Deck width86 ft (26.2 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,250 (2022)
Projected traffic14,056 by 2031
Trucks11%
Lanes on structure4
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

OwnerOther State Agency
Maintained byOther State Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$10 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Tremont ST over Comb Amtrak/Mbta & Orng built?

It was built in 1981, making it 44 years old in 2025.

What condition is HWY Tremont ST over Comb Amtrak/Mbta & Orng 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 September 2022.

How much traffic does HWY Tremont ST over Comb Amtrak/Mbta & Orng carry?

About 22,250 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is HWY Tremont ST over Comb Amtrak/Mbta & Orng?

The structure is 125 ft (38 m) long with a longest span of 64 ft (19.6 m) and a deck 86 ft wide.

Who owns HWY Tremont ST over Comb Amtrak/Mbta & Orng?

It is owned by the Other State Agency.