US Bridges

I 495 NB over HWY Donald Lynch Blvd

Fair

Middlesex County, Massachusetts · .1 MI N of I-290 · Structure no. M06007281DOTNBI

Built
1963
62 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
138 ft
3 main spans
Daily traffic
48,156
2023 count
Owner
State
State Highway Agency

About this bridge

I 495 NB over HWY Donald Lynch Blvd is a prestressed concrete stringer/multi-beam or girder carrying I 495 NB over HWY Donald Lynch Blvd 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 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 48,156 vehicles a day, roughly 7% of them trucks, projected to reach 78,965 by 2032. The structure is 138 ft (42.2 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 Donald Lynch Blvd
Location.1 MI N of I-290
RouteInterstate 495
CountyMiddlesex County
StateMassachusetts
Coordinates42.36711, -71.59358
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
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 inspectionMarch 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.3 US tons
Inventory rating23.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length138 ft (42.2 m)
Longest span67 ft (20.3 m)
Deck width56 ft (17.1 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48,156 (2023)
Projected traffic78,965 by 2032
Trucks7%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$7.2 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 495 NB over HWY Donald Lynch Blvd built?

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

What condition is I 495 NB over HWY Donald Lynch Blvd 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 March 2023.

How much traffic does I 495 NB over HWY Donald Lynch Blvd carry?

About 48,156 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is I 495 NB over HWY Donald Lynch Blvd?

The structure is 138 ft (42.2 m) long with a longest span of 67 ft (20.3 m) and a deck 56 ft wide.

Who owns I 495 NB over HWY Donald Lynch Blvd?

It is owned by the State Highway Agency.