US Bridges

I 495 NB over I 93

Fair

Essex County, Massachusetts · JCT I-93 & I-495 · Structure no. A090312XQDOTNBI

Built
1961
64 years old, rebuilt 1992
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
252 ft
4 main spans
Daily traffic
50,332
2024 count
Owner
State
State Highway Agency

About this bridge

I 495 NB over I 93 is a steel stringer/multi-beam or girder carrying I 495 NB over I 93 in Essex County, Massachusetts. It was built in 1961 and reconstructed in 1992, so it is 64 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 50,332 vehicles a day, roughly 6% of them trucks, projected to reach 84,335 by 2033. The structure is 252 ft (76.8 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 495 NB
CrossesI 93
LocationJCT I-93 & I-495
RouteInterstate 495
CountyEssex County
StateMassachusetts
Coordinates42.66402, -71.19422
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 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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating77.5 US tons
Inventory rating46.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length252 ft (76.8 m)
Longest span88 ft (26.8 m)
Deck width60 ft (18.3 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50,332 (2024)
Projected traffic84,335 by 2033
Trucks6%
Lanes on structure4
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$13.7 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 495 NB over I 93 built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1992.

What condition is I 495 NB over I 93 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 I 495 NB over I 93 carry?

About 50,332 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is I 495 NB over I 93?

The structure is 252 ft (76.8 m) long with a longest span of 88 ft (26.8 m) and a deck 60 ft wide.

Who owns I 495 NB over I 93?

It is owned by the State Highway Agency.