US Bridges

I 90 over RR Csx/Mbta

Fair

Middlesex County, Massachusetts · .1 MI S. Charles Rv S40 · Structure no. N120714RBDOTNBI

Built
1964
61 years old
Condition
Fair
inspected February 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
182 ft
1 main span
Daily traffic
113,830
2019 count
Owner
State
State Highway Agency

About this bridge

I 90 over RR Csx/Mbta is a steel stringer/multi-beam or girder carrying I 90 over RR Csx/Mbta in Middlesex 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: open, would be posted or closed except for temporary shoring.

It carries about 113,830 vehicles a day, roughly 12% of them trucks, projected to reach 166,561 by 2032. The structure is 182 ft (55.5 m) long and 117 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesI 90
CrossesRR Csx/Mbta
Location.1 MI S. Charles Rv S40
RouteInterstate 90
CountyMiddlesex County
StateMassachusetts
Coordinates42.35763, -71.17386
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.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2022
Inspection intervalevery 24 months
Operating statusOpen, would be posted or closed except for temporary shoring
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.7 US tons
Inventory rating30.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length182 ft (55.5 m)
Longest span182 ft (55.4 m)
Deck width117 ft (35.6 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic113,830 (2019)
Projected traffic166,561 by 2032
Trucks12%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.1 mi (5 km)
TollOn a toll road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate 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$19.4 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 90 over RR Csx/Mbta built?

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

What condition is I 90 over RR Csx/Mbta 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 February 2022.

How much traffic does I 90 over RR Csx/Mbta carry?

About 113,830 vehicles per day (2019 count), of which roughly 12% are trucks.

How long is I 90 over RR Csx/Mbta?

The structure is 182 ft (55.5 m) long with a longest span of 182 ft (55.4 m) and a deck 117 ft wide.

Who owns I 90 over RR Csx/Mbta?

It is owned by the State Highway Agency.