US Bridges

HWY Mass Ave over ST 9 Huntington Ave

Fair

Suffolk County, Massachusetts · 1.1 KM S of Charles Riv · Structure no. B1623838PMUNNBI

Built
1941
84 years old, rebuilt 1976
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
55 ft
1 main span
Daily traffic
23,275
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

HWY Mass Ave over ST 9 Huntington Ave is a steel stringer/multi-beam or girder carrying HWY Mass Ave over ST 9 Huntington Ave in Suffolk County, Massachusetts. It was built in 1941 and reconstructed in 1976, so it is 84 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 23,275 vehicles a day, roughly 8% of them trucks, projected to reach 34,587 by 2031. The structure is 55 ft (16.8 m) long and 158 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHWY Mass Ave
CrossesST 9 Huntington Ave
Location1.1 KM S of Charles Riv
RouteCity Street 0
CountySuffolk County
StateMassachusetts
Coordinates42.34278, -71.08487
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 inspectionMarch 2024
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 rating81.9 US tons
Inventory rating49.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length55 ft (16.8 m)
Longest span49 ft (14.9 m)
Deck width158 ft (48.3 m)
Roadway width95 ft (29 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,275 (2024)
Projected traffic34,587 by 2031
Trucks8%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$8 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Mass Ave over ST 9 Huntington Ave built?

It was built in 1941, making it 84 years old in 2025. It was reconstructed in 1976.

What condition is HWY Mass Ave over ST 9 Huntington Ave 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 March 2024.

How much traffic does HWY Mass Ave over ST 9 Huntington Ave carry?

About 23,275 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is HWY Mass Ave over ST 9 Huntington Ave?

The structure is 55 ft (16.8 m) long with a longest span of 49 ft (14.9 m) and a deck 158 ft wide.

Who owns HWY Mass Ave over ST 9 Huntington Ave?

It is owned by the City or Municipal Highway Agency.