US Bridges

I 93 Ramp Lc-N over I 93 Ramp S-N Boat

Good

Suffolk County, Massachusetts · Unit 1 · Structure no. B166916K2DOTNBI

Built
2003
22 years old
Condition
Good
inspected December 2023
Type
Box Beam or Girders - Single or Spread
Steel Continuous
Length
396 ft
3 main spans
Daily traffic
12,400
2023 count
Owner
State
State Highway Agency

About this bridge

I 93 Ramp Lc-N over I 93 Ramp S-N Boat is a steel continuous box beam or girders - single or spread carrying I 93 Ramp Lc-N over I 93 Ramp S-N Boat in Suffolk County, Massachusetts. It was built in 2003, so it is 22 years old, younger than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 12,400 vehicles a day, roughly 1% of them trucks, projected to reach 13,828 by 2032. The structure is 396 ft (120.7 m) long and 30 ft wide.

Location

Open in Google Maps
CarriesI 93 Ramp Lc-N
CrossesI 93 Ramp S-N Boat
LocationUnit 1
RouteInterstate 93
CountySuffolk County
StateMassachusetts
Coordinates42.36628, -71.06605
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69 US tons
Inventory rating41.3 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length396 ft (120.7 m)
Longest span146 ft (44.6 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,400 (2023)
Projected traffic13,828 by 2032
Trucks1%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$1.1 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 93 Ramp Lc-N over I 93 Ramp S-N Boat built?

It was built in 2003, making it 22 years old in 2025.

What condition is I 93 Ramp Lc-N over I 93 Ramp S-N Boat in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2023.

How much traffic does I 93 Ramp Lc-N over I 93 Ramp S-N Boat carry?

About 12,400 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is I 93 Ramp Lc-N over I 93 Ramp S-N Boat?

The structure is 396 ft (120.7 m) long with a longest span of 146 ft (44.6 m) and a deck 30 ft wide.

Who owns I 93 Ramp Lc-N over I 93 Ramp S-N Boat?

It is owned by the State Highway Agency.