US Bridges

HWY Lwll Conn NB over I 495 Ramp B-11

Fair

Middlesex County, Massachusetts · 0.16 KM W Rt 495 · Structure no. C080332H0DOTNBI

Built
1959
66 years old, rebuilt 1984
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
116 ft
3 main spans
Daily traffic
40,019
2024 count
Owner
State
State Highway Agency

About this bridge

HWY Lwll Conn NB over I 495 Ramp B-11 is a steel stringer/multi-beam or girder carrying HWY Lwll Conn NB over I 495 Ramp B-11 in Middlesex County, Massachusetts. It was built in 1959 and reconstructed in 1984, 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 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 40,019 vehicles a day, roughly 3% of them trucks, projected to reach 41,062 by 2031. The structure is 116 ft (35.3 m) long and 45 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesHWY Lwll Conn NB
CrossesI 495 Ramp B-11
Location0.16 KM W Rt 495
RouteCity Street 0
CountyMiddlesex County
StateMassachusetts
Coordinates42.60606, -71.32027
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.3 US tons
Inventory rating35.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length116 ft (35.3 m)
Longest span50 ft (15.2 m)
Deck width45 ft (13.7 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40,019 (2024)
Projected traffic41,062 by 2031
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

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$4.8 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Lwll Conn NB over I 495 Ramp B-11 built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1984.

What condition is HWY Lwll Conn NB over I 495 Ramp B-11 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 December 2024.

How much traffic does HWY Lwll Conn NB over I 495 Ramp B-11 carry?

About 40,019 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is HWY Lwll Conn NB over I 495 Ramp B-11?

The structure is 116 ft (35.3 m) long with a longest span of 50 ft (15.2 m) and a deck 45 ft wide.

Who owns HWY Lwll Conn NB over I 495 Ramp B-11?

It is owned by the State Highway Agency.