US Bridges

HWY North ST over I 495

PoorPosted for load

Middlesex County, Massachusetts · 0.6 MI Swly Rt 133 · Structure no. T030132L5DOTNBI

Built
1961
64 years old
Condition
Poor
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
278 ft
5 main spans
Daily traffic
6,200
2024 count
Owner
State
State Highway Agency

About this bridge

HWY North ST over I 495 is a steel stringer/multi-beam or girder carrying HWY North ST over I 495 in Middlesex County, Massachusetts. It was built in 1961, 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 6,200 vehicles a day, roughly 4% of them trucks, projected to reach 13,266 by 2031. The structure is 278 ft (84.7 m) long and 40 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesHWY North ST
CrossesI 495
Location0.6 MI Swly Rt 133
RouteCity Street 0
CountyMiddlesex County
StateMassachusetts
Coordinates42.63865, -71.24021
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be 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 rating49.8 US tons
Inventory rating29.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length278 ft (84.7 m)
Longest span73 ft (22.1 m)
Deck width40 ft (12.3 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,200 (2024)
Projected traffic13,266 by 2031
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$19.6 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY North ST over I 495 built?

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

What condition is HWY North ST over I 495 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.

How much traffic does HWY North ST over I 495 carry?

About 6,200 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is HWY North ST over I 495?

The structure is 278 ft (84.7 m) long with a longest span of 73 ft (22.1 m) and a deck 40 ft wide.

Who owns HWY North ST over I 495?

It is owned by the State Highway Agency.