US Bridges

I 93 NB on Rmp over I 93 Sb/Mbta Orange LN

Fair

Suffolk County, Massachusetts · .8 MI N of JCT I93&US1 · Structure no. B162813CEDOTNBI

Built
1970
55 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
300 ft
4 main spans
Daily traffic
10,866
2022 count
Owner
State
State Highway Agency

About this bridge

I 93 NB on Rmp over I 93 Sb/Mbta Orange LN is a steel stringer/multi-beam or girder carrying I 93 NB on Rmp over I 93 Sb/Mbta Orange LN in Suffolk County, Massachusetts. It was built in 1970, so it is 55 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 10,866 vehicles a day, roughly 4% of them trucks, projected to reach 38,377 by 2032. The structure is 300 ft (91.4 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 93 NB on Rmp
CrossesI 93 Sb/Mbta Orange LN
Location.8 MI N of JCT I93&US1
RouteInterstate 93
CountySuffolk County
StateMassachusetts
Coordinates42.38197, -71.07692
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 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 geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.6 US tons
Inventory rating35.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length300 ft (91.4 m)
Longest span77 ft (23.5 m)
Deck width45 ft (13.7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deck17 ft (5.1 m)

Traffic and service

Average daily traffic10,866 (2022)
Projected traffic38,377 by 2032
Trucks4%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
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$12.3 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 93 NB on Rmp over I 93 Sb/Mbta Orange LN built?

It was built in 1970, making it 55 years old in 2025.

What condition is I 93 NB on Rmp over I 93 Sb/Mbta Orange LN 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 April 2023.

How much traffic does I 93 NB on Rmp over I 93 Sb/Mbta Orange LN carry?

About 10,866 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is I 93 NB on Rmp over I 93 Sb/Mbta Orange LN?

The structure is 300 ft (91.4 m) long with a longest span of 77 ft (23.5 m) and a deck 45 ft wide.

Who owns I 93 NB on Rmp over I 93 Sb/Mbta Orange LN?

It is owned by the State Highway Agency.