US Bridges

I 495 NB over HWY Middle RD

Fair

Essex County, Massachusetts · 0.25 MI S of ST-110 · Structure no. H120362WWDOTNBI

Built
1964
61 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
135 ft
3 main spans
Daily traffic
34,028
2021 count
Owner
State
State Highway Agency

About this bridge

I 495 NB over HWY Middle RD is a steel stringer/multi-beam or girder carrying I 495 NB over HWY Middle RD in Essex County, Massachusetts. It was built in 1964, so it is 61 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 6 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 34,028 vehicles a day, roughly 8% of them trucks, projected to reach 94,758 by 2032. The structure is 135 ft (41.3 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 Middle RD
Location0.25 MI S of ST-110
RouteInterstate 495
CountyEssex County
StateMassachusetts
Coordinates42.80581, -71.03333
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
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 rating62.3 US tons
Inventory rating37.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length135 ft (41.3 m)
Longest span47 ft (14.3 m)
Deck width56 ft (17.1 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,028 (2021)
Projected traffic94,758 by 2032
Trucks8%
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$3.1 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 495 NB over HWY Middle RD built?

It was built in 1964, making it 61 years old in 2025.

What condition is I 495 NB over HWY Middle RD 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 Middle RD carry?

About 34,028 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is I 495 NB over HWY Middle RD?

The structure is 135 ft (41.3 m) long with a longest span of 47 ft (14.3 m) and a deck 56 ft wide.

Who owns I 495 NB over HWY Middle RD?

It is owned by the State Highway Agency.