US Bridges

I 93 Ramp Sa-Cn over I 93 Ramps

Fair

Suffolk County, Massachusetts · North Bank Charles River · Structure no. B166039PFDOTNBI

Built
2004
21 years old
Condition
Fair
inspected March 2022
Type
Segmental Box Girder
Prestressed Concrete Continuous
Length
422 ft
3 main spans
Daily traffic
20,359
2019 count
Owner
State
State Highway Agency

About this bridge

I 93 Ramp Sa-Cn over I 93 Ramps is a prestressed concrete continuous segmental box girder carrying I 93 Ramp Sa-Cn over I 93 Ramps in Suffolk County, Massachusetts. It was built in 2004, so it is 21 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 20,359 vehicles a day, roughly 4% of them trucks. The structure is 422 ft (128.7 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 93 Ramp Sa-Cn
CrossesI 93 Ramps
LocationNorth Bank Charles River
RouteInterstate 93
CountySuffolk County
StateMassachusetts
Coordinates42.37022, -71.06444
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.7 US tons
Inventory rating52.4 US tons

Structure

Structure typeSegmental Box Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length422 ft (128.7 m)
Longest span154 ft (46.9 m)
Deck width36 ft (10.9 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,359 (2019)
Projected traffic—
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$4.2 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 93 Ramp Sa-Cn over I 93 Ramps built?

It was built in 2004, making it 21 years old in 2025.

What condition is I 93 Ramp Sa-Cn over I 93 Ramps 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 2022.

How much traffic does I 93 Ramp Sa-Cn over I 93 Ramps carry?

About 20,359 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is I 93 Ramp Sa-Cn over I 93 Ramps?

The structure is 422 ft (128.7 m) long with a longest span of 154 ft (46.9 m) and a deck 36 ft wide.

Who owns I 93 Ramp Sa-Cn over I 93 Ramps?

It is owned by the State Highway Agency.