US Bridges

HWY Austin ST over Comb I 93 Rmp&mbta&orng

Fair

Suffolk County, Massachusetts · .1 M. W of Rutherford ST · Structure no. B161794F6DOTNBI

Built
1974
51 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
1,825 ft
1 main span
Daily traffic
39,400
2023 count
Owner
State
State Highway Agency

About this bridge

HWY Austin ST over Comb I 93 Rmp&mbta&orng is a steel stringer/multi-beam or girder carrying HWY Austin ST over Comb I 93 Rmp&mbta&orng in Suffolk County, Massachusetts. It was built in 1974, so it is 51 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 39,400 vehicles a day, roughly 4% of them trucks, projected to reach 61,909 by 2032. The structure is 1,825 ft (556.3 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHWY Austin ST
CrossesComb I 93 Rmp&mbta&orng
Location.1 M. W of Rutherford ST
RouteCity Street 0
CountySuffolk County
StateMassachusetts
Coordinates42.37256, -71.07038
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment7: Better than present minimum criteria
Operating rating53.6 US tons
Inventory rating12.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+23 approach)
Design loadH 20
Structure length1,825 ft (556.3 m)
Longest span150 ft (45.7 m)
Deck width60 ft (18.3 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deck15 ft (4.4 m)

Traffic and service

Average daily traffic39,400 (2023)
Projected traffic61,909 by 2032
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed1.2 mi (2 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$99.3 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Austin ST over Comb I 93 Rmp&mbta&orng built?

It was built in 1974, making it 51 years old in 2025.

What condition is HWY Austin ST over Comb I 93 Rmp&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 June 2023.

How much traffic does HWY Austin ST over Comb I 93 Rmp&mbta&orng carry?

About 39,400 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is HWY Austin ST over Comb I 93 Rmp&mbta&orng?

The structure is 1,825 ft (556.3 m) long with a longest span of 150 ft (45.7 m) and a deck 60 ft wide.

Who owns HWY Austin ST over Comb I 93 Rmp&mbta&orng?

It is owned by the State Highway Agency.