US Bridges

I 495 SB over RR Mbta/Bmrr

Fair

Essex County, Massachusetts · 2.6 MI N I93 · Structure no. A090372Y0DOTNBI

Built
1962
63 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
132 ft
3 main spans
Daily traffic
55,600
2024 count
Owner
State
State Highway Agency

About this bridge

I 495 SB over RR Mbta/Bmrr is a steel stringer/multi-beam or girder carrying I 495 SB over RR Mbta/Bmrr in Essex County, Massachusetts. It was built in 1962, so it is 63 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 55,600 vehicles a day, roughly 10% of them trucks, projected to reach 157,930 by 2031. The structure is 132 ft (40.2 m) long and 57 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 495 SB
CrossesRR Mbta/Bmrr
Location2.6 MI N I93
RouteInterstate 495
CountyEssex County
StateMassachusetts
Coordinates42.6805, -71.14941
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 inspectionJuly 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 alignment8: Equal to present desirable criteria
Operating rating66.8 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length132 ft (40.2 m)
Longest span48 ft (14.6 m)
Deck width57 ft (17.4 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55,600 (2024)
Projected traffic157,930 by 2031
Trucks10%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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$6.9 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 495 SB over RR Mbta/Bmrr built?

It was built in 1962, making it 63 years old in 2025.

What condition is I 495 SB over RR Mbta/Bmrr 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 July 2024.

How much traffic does I 495 SB over RR Mbta/Bmrr carry?

About 55,600 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is I 495 SB over RR Mbta/Bmrr?

The structure is 132 ft (40.2 m) long with a longest span of 48 ft (14.6 m) and a deck 57 ft wide.

Who owns I 495 SB over RR Mbta/Bmrr?

It is owned by the State Highway Agency.