US Bridges

ST 27 N Main ST over ST 9 Worcester ST

Fair

Middlesex County, Massachusetts · At JCT of Rtes 9 & 27 · Structure no. N0302028QDOTNBI

Built
1931
94 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
98 ft
2 main spans
Daily traffic
8,538
2021 count
Owner
State
State Highway Agency

About this bridge

ST 27 N Main ST over ST 9 Worcester ST is a steel continuous stringer/multi-beam or girder carrying ST 27 N Main ST over ST 9 Worcester ST in Middlesex County, Massachusetts. It was built in 1931, so it is 94 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 8,538 vehicles a day, roughly 10% of them trucks, projected to reach 44,220 by 2033. The structure is 98 ft (30 m) long and 53 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesST 27 N Main ST
CrossesST 9 Worcester ST
LocationAt JCT of Rtes 9 & 27
RouteState Highway 27
CountyMiddlesex County
StateMassachusetts
Coordinates42.29999, -71.35993
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 inspectionJanuary 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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating87.3 US tons
Inventory rating53.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length98 ft (30 m)
Longest span45 ft (13.7 m)
Deck width53 ft (16.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,538 (2021)
Projected traffic44,220 by 2033
Trucks10%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$4.9 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST 27 N Main ST over ST 9 Worcester ST built?

It was built in 1931, making it 94 years old in 2025.

What condition is ST 27 N Main ST over ST 9 Worcester ST 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 January 2024.

How much traffic does ST 27 N Main ST over ST 9 Worcester ST carry?

About 8,538 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is ST 27 N Main ST over ST 9 Worcester ST?

The structure is 98 ft (30 m) long with a longest span of 45 ft (13.7 m) and a deck 53 ft wide.

Who owns ST 27 N Main ST over ST 9 Worcester ST?

It is owned by the State Highway Agency.