US Bridges

HWY Lwl Con B-11 over I 495

Poor

Middlesex County, Massachusetts · 0.4 KM E Rt 495 & Rt 3 · Structure no. C080302JGDOTNBI

Built
1959
66 years old
Condition
Poor
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
207 ft
2 main spans
Daily traffic
8,952
2018 count
Owner
State
State Highway Agency

About this bridge

HWY Lwl Con B-11 over I 495 is a steel stringer/multi-beam or girder carrying HWY Lwl Con B-11 over I 495 in Middlesex County, Massachusetts. It was built in 1959, so it is 66 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.

It carries about 8,952 vehicles a day, roughly 7% of them trucks, projected to reach 22,900 by 2032. The structure is 207 ft (63.1 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHWY Lwl Con B-11
CrossesI 495
Location0.4 KM E Rt 495 & Rt 3
RouteInterstate 495
CountyMiddlesex County
StateMassachusetts
Coordinates42.60823, -71.31891
Functional classUrban Principal Arterial - Other Freeway or Expressway

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 12 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.4 US tons
Inventory rating38.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length207 ft (63.1 m)
Longest span102 ft (31 m)
Deck width44 ft (13.4 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,952 (2018)
Projected traffic22,900 by 2032
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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$8.4 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Lwl Con B-11 over I 495 built?

It was built in 1959, making it 66 years old in 2025.

What condition is HWY Lwl Con B-11 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 July 2023.

How much traffic does HWY Lwl Con B-11 over I 495 carry?

About 8,952 vehicles per day (2018 count), of which roughly 7% are trucks.

How long is HWY Lwl Con B-11 over I 495?

The structure is 207 ft (63.1 m) long with a longest span of 102 ft (31 m) and a deck 44 ft wide.

Who owns HWY Lwl Con B-11 over I 495?

It is owned by the State Highway Agency.