US Bridges

HWY Dorchstr Ave over TR Red Line (tunnel)

Fair

Suffolk County, Massachusetts · 0.3 MI S of Exit 16 I-93 · Structure no. B161298MQMBTNBI

Built
1925
100 years old
Condition
Fair
inspected August 2021
Type
Stringer/Multi-beam or Girder
Steel
Length
45 ft
1 main span
Daily traffic
—
2013 count
Owner
State
Other State Agency

About this bridge

HWY Dorchstr Ave over TR Red Line (tunnel) is a steel stringer/multi-beam or girder carrying HWY Dorchstr Ave over TR Red Line (tunnel) in Suffolk County, Massachusetts. It was built in 1925, so it is 100 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.

No traffic count is recorded. The structure is 45 ft (13.7 m) long and 60 ft wide.

Location

Open in Google Maps
CarriesHWY Dorchstr Ave
CrossesTR Red Line (tunnel)
Location0.3 MI S of Exit 16 I-93
RouteCity Street 0
CountySuffolk County
StateMassachusetts
Coordinates42.32639, -71.05722
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2021
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 geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating37.1 US tons
Inventory rating22.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+1 approach)
Design loadH 20
Structure length45 ft (13.7 m)
Longest span38 ft (11.7 m)
Deck width60 ft (18.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic—
Projected traffic—
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther State Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.5 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Dorchstr Ave over TR Red Line (tunnel) built?

It was built in 1925, making it 100 years old in 2025.

What condition is HWY Dorchstr Ave over TR Red Line (tunnel) 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 August 2021.

How much traffic does HWY Dorchstr Ave over TR Red Line (tunnel) carry?

No traffic count is recorded for this structure.

How long is HWY Dorchstr Ave over TR Red Line (tunnel)?

The structure is 45 ft (13.7 m) long with a longest span of 38 ft (11.7 m) and a deck 60 ft wide.

Who owns HWY Dorchstr Ave over TR Red Line (tunnel)?

It is owned by the Other State Agency and maintained by the State Highway Agency.