US Bridges

I 495 NB over HWY River RD

Fair

Middlesex County, Massachusetts · @mm 65.6 · Structure no. H2501727HDOTNBI

Built
1963
62 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
134 ft
3 main spans
Daily traffic
49,446
2023 count
Owner
State
State Highway Agency

About this bridge

I 495 NB over HWY River RD is a steel stringer/multi-beam or girder carrying I 495 NB over HWY River RD in Middlesex 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 6 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 49,446 vehicles a day, roughly 23% of them trucks, projected to reach 75,806 by 2032. The structure is 134 ft (40.8 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 River RD
Location@mm 65.6
RouteInterstate 495
CountyMiddlesex County
StateMassachusetts
Coordinates42.37165, -71.59605
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.8 US tons
Inventory rating37 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length134 ft (40.8 m)
Longest span65 ft (19.9 m)
Deck width56 ft (17.1 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic49,446 (2023)
Projected traffic75,806 by 2032
Trucks23%
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$3.1 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 495 NB over HWY River RD built?

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

What condition is I 495 NB over HWY River RD 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 2025.

How much traffic does I 495 NB over HWY River RD carry?

About 49,446 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is I 495 NB over HWY River RD?

The structure is 134 ft (40.8 m) long with a longest span of 65 ft (19.9 m) and a deck 56 ft wide.

Who owns I 495 NB over HWY River RD?

It is owned by the State Highway Agency.