US Bridges

I 495 NB over HWY Main ST

Fair

Essex County, Massachusetts · .6 MI N Exit 54 · Structure no. A070242WDDOTNBI

Built
1964
61 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
115 ft
3 main spans
Daily traffic
36,900
2019 count
Owner
State
State Highway Agency

About this bridge

I 495 NB over HWY Main ST is a steel stringer/multi-beam or girder carrying I 495 NB over HWY Main ST in Essex County, Massachusetts. It was built in 1964, so it is 61 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 36,900 vehicles a day, roughly 10% of them trucks, projected to reach 87,019 by 2032. The structure is 115 ft (35.1 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 495 NB
CrossesHWY Main ST
Location.6 MI N Exit 54
RouteInterstate 495
CountyEssex County
StateMassachusetts
Coordinates42.8423, -70.9269
Functional classUrban 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
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 inspectionNovember 2023
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 rating61.5 US tons
Inventory rating36.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length115 ft (35.1 m)
Longest span56 ft (17.1 m)
Deck width56 ft (17.1 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,900 (2019)
Projected traffic87,019 by 2032
Trucks10%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 495 NB over HWY Main ST built?

It was built in 1964, making it 61 years old in 2025.

What condition is I 495 NB over HWY 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 November 2023.

How much traffic does I 495 NB over HWY Main ST carry?

About 36,900 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is I 495 NB over HWY Main ST?

The structure is 115 ft (35.1 m) long with a longest span of 56 ft (17.1 m) and a deck 56 ft wide.

Who owns I 495 NB over HWY Main ST?

It is owned by the State Highway Agency.