US Bridges

I 495 NB over HWY Ramps a & B

Fair

Essex County, Massachusetts · .3 MI N Merrimac River · Structure no. L040392X7DOTNBI

Built
1962
63 years old, rebuilt 2002
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
149 ft
3 main spans
Daily traffic
57,480
2024 count
Owner
State
State Highway Agency

About this bridge

I 495 NB over HWY Ramps a & B is a steel stringer/multi-beam or girder carrying I 495 NB over HWY Ramps a & B in Essex County, Massachusetts. It was built in 1962 and reconstructed in 2002, so it is 63 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 57,480 vehicles a day, roughly 5% of them trucks, projected to reach 126,660 by 2031. The structure is 149 ft (45.4 m) long and 71 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI 495 NB
CrossesHWY Ramps a & B
Location.3 MI N Merrimac River
RouteInterstate 495
CountyEssex County
StateMassachusetts
Coordinates42.71158, -71.13724
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64 US tons
Inventory rating38.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length149 ft (45.4 m)
Longest span85 ft (25.9 m)
Deck width71 ft (21.5 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic57,480 (2024)
Projected traffic126,660 by 2031
Trucks5%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 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 statusPossibly eligible for the National Register; requires further investigation
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$11.1 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 495 NB over HWY Ramps a & B built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 2002.

What condition is I 495 NB over HWY Ramps a & B 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 August 2024.

How much traffic does I 495 NB over HWY Ramps a & B carry?

About 57,480 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is I 495 NB over HWY Ramps a & B?

The structure is 149 ft (45.4 m) long with a longest span of 85 ft (25.9 m) and a deck 71 ft wide.

Who owns I 495 NB over HWY Ramps a & B?

It is owned by the State Highway Agency.