US Bridges

I 93 SB B10-B16RP over RR MBTA & Bmrr

Fair

Suffolk County, Massachusetts · .8 MI N of JCT US1 & I93 · Structure no. B162813CGDOTNBI

Built
1970
55 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
395 ft
5 main spans
Daily traffic
26,000
2017 count
Owner
State
State Highway Agency

About this bridge

I 93 SB B10-B16RP over RR MBTA & Bmrr is a steel stringer/multi-beam or girder carrying I 93 SB B10-B16RP over RR MBTA & Bmrr 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 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 26,000 vehicles a day, roughly 6% of them trucks, projected to reach 20,531 by 2032. The structure is 395 ft (120.4 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 93 SB B10-B16RP
CrossesRR MBTA & Bmrr
Location.8 MI N of JCT US1 & I93
RouteInterstate 93
CountySuffolk County
StateMassachusetts
Coordinates42.38209, -71.07716
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
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 alignment7: Better than present minimum criteria
Operating rating64.7 US tons
Inventory rating38.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length395 ft (120.4 m)
Longest span92 ft (28 m)
Deck width45 ft (13.7 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,000 (2017)
Projected traffic20,531 by 2032
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$3.2 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 93 SB B10-B16RP over RR MBTA & Bmrr built?

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

What condition is I 93 SB B10-B16RP over RR MBTA & Bmrr 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 July 2023.

How much traffic does I 93 SB B10-B16RP over RR MBTA & Bmrr carry?

About 26,000 vehicles per day (2017 count), of which roughly 6% are trucks.

How long is I 93 SB B10-B16RP over RR MBTA & Bmrr?

The structure is 395 ft (120.4 m) long with a longest span of 92 ft (28 m) and a deck 45 ft wide.

Who owns I 93 SB B10-B16RP over RR MBTA & Bmrr?

It is owned by the State Highway Agency.