US Bridges

I 93 Ramps Sn NS over RR Bmrr Bsg Spur

Fair

Suffolk County, Massachusetts · I93/US1 Interchange · Structure no. B166059U0DOTNBI

Built
1999
26 years old
Condition
Fair
inspected February 2022
Type
Box Beam or Girders - Multiple
Steel Continuous
Length
853 ft
6 main spans
Daily traffic
37,301
2016 count
Owner
State
State Highway Agency

About this bridge

I 93 Ramps Sn NS over RR Bmrr Bsg Spur is a steel continuous box beam or girders - multiple carrying I 93 Ramps Sn NS over RR Bmrr Bsg Spur in Suffolk County, Massachusetts. It was built in 1999, so it is 26 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 37,301 vehicles a day, roughly 2% of them trucks, projected to reach 118,763 by 2031. The structure is 853 ft (260 m) long and 50 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesI 93 Ramps Sn NS
CrossesRR Bmrr Bsg Spur
LocationI93/US1 Interchange
RouteInterstate 93
CountySuffolk County
StateMassachusetts
Coordinates42.37631, -71.07452
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97.8 US tons
Inventory rating58.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 25 or greater
Structure length853 ft (260 m)
Longest span147 ft (44.8 m)
Deck width50 ft (15.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,301 (2016)
Projected traffic118,763 by 2031
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.7 mi (6 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 statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$7.7 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 93 Ramps Sn NS over RR Bmrr Bsg Spur built?

It was built in 1999, making it 26 years old in 2025.

What condition is I 93 Ramps Sn NS over RR Bmrr Bsg Spur 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 93 Ramps Sn NS over RR Bmrr Bsg Spur carry?

About 37,301 vehicles per day (2016 count), of which roughly 2% are trucks.

How long is I 93 Ramps Sn NS over RR Bmrr Bsg Spur?

The structure is 853 ft (260 m) long with a longest span of 147 ft (44.8 m) and a deck 50 ft wide.

Who owns I 93 Ramps Sn NS over RR Bmrr Bsg Spur?

It is owned by the State Highway Agency.