US Bridges

HWY Westford ST over I 495

PoorPosted for load

Middlesex County, Massachusetts · 0.75 MI W Rt 110 · Structure no. C080362LQDOTNBI

Built
1961
64 years old
Condition
Poor
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
392 ft
5 main spans
Daily traffic
4,000
2023 count
Owner
State
State Highway Agency

About this bridge

HWY Westford ST over I 495 is a steel stringer/multi-beam or girder carrying HWY Westford 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 3 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 4,000 vehicles a day, roughly 3% of them trucks, projected to reach 11,213 by 2032. The structure is 392 ft (119.5 m) long and 50 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesHWY Westford ST
CrossesI 495
Location0.75 MI W Rt 110
RouteCity Street 0
Coordinates42.60082, -71.36044
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
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 6 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.4 US tons
Inventory rating21.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length392 ft (119.5 m)
Longest span106 ft (32.3 m)
Deck width50 ft (15.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,000 (2023)
Projected traffic11,213 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 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$27.3 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Westford ST over I 495 built?

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

What condition is HWY Westford 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 March 2023.

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

About 4,000 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is HWY Westford ST over I 495?

The structure is 392 ft (119.5 m) long with a longest span of 106 ft (32.3 m) and a deck 50 ft wide.

Who owns HWY Westford ST over I 495?

It is owned by the State Highway Agency.