US Bridges

I 495 SB over ST117 Main ST

Fair

Worcester County, Massachusetts · Mm 70 / Rt 495 at Rt 117 · Structure no. B150021V5DOTNBI

Built
1963
62 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
120 ft
3 main spans
Daily traffic
43,185
2023 count
Owner
State
State Highway Agency

About this bridge

I 495 SB over ST117 Main ST is a prestressed concrete stringer/multi-beam or girder carrying I 495 SB over ST117 Main ST in Worcester County, Massachusetts. It was built in 1963, so it is 62 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 43,185 vehicles a day, roughly 10% of them trucks, projected to reach 154,771 by 2032. The structure is 120 ft (36.6 m) long and 58 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI 495 SB
CrossesST117 Main ST
LocationMm 70 / Rt 495 at Rt 117
RouteInterstate 495
CountyWorcester County
StateMassachusetts
Coordinates42.43088, -71.59311
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2025
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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.5 US tons
Inventory rating36.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length120 ft (36.6 m)
Longest span56 ft (17.1 m)
Deck width58 ft (17.7 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic43,185 (2023)
Projected traffic154,771 by 2032
Trucks10%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$6.4 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 495 SB over ST117 Main ST built?

It was built in 1963, making it 62 years old in 2025.

What condition is I 495 SB over ST117 Main 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 February 2025.

How much traffic does I 495 SB over ST117 Main ST carry?

About 43,185 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is I 495 SB over ST117 Main ST?

The structure is 120 ft (36.6 m) long with a longest span of 56 ft (17.1 m) and a deck 58 ft wide.

Who owns I 495 SB over ST117 Main ST?

It is owned by the State Highway Agency.