US Bridges

I 90 Ramps over Comb I 95 & Charles Riv

Fair

Middlesex County, Massachusetts · At Int 14 L49 · Structure no. N120644QJDOTNBI

Built
1957
68 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
595 ft
6 main spans
Daily traffic
56,670
2018 count
Owner
State
State Highway Agency

About this bridge

I 90 Ramps over Comb I 95 & Charles Riv is a steel stringer/multi-beam or girder carrying I 90 Ramps over Comb I 95 & Charles Riv in Middlesex County, Massachusetts. It was built in 1957, so it is 68 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 56,670 vehicles a day, roughly 9% of them trucks, projected to reach 175 by 2032. The structure is 595 ft (181.3 m) long and 68 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesI 90 Ramps
CrossesComb I 95 & Charles Riv
LocationAt Int 14 L49
RouteInterstate 90
CountyMiddlesex County
StateMassachusetts
Coordinates42.34153, -71.26222
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.5 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length595 ft (181.3 m)
Longest span108 ft (33 m)
Deck width68 ft (20.7 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic56,670 (2018)
Projected traffic175 by 2032
Trucks9%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed3.1 mi (5 km)
TollOn a toll 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$36.7 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 90 Ramps over Comb I 95 & Charles Riv built?

It was built in 1957, making it 68 years old in 2025.

What condition is I 90 Ramps over Comb I 95 & Charles Riv 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 90 Ramps over Comb I 95 & Charles Riv carry?

About 56,670 vehicles per day (2018 count), of which roughly 9% are trucks.

How long is I 90 Ramps over Comb I 95 & Charles Riv?

The structure is 595 ft (181.3 m) long with a longest span of 108 ft (33 m) and a deck 68 ft wide.

Who owns I 90 Ramps over Comb I 95 & Charles Riv?

It is owned by the State Highway Agency.