US Bridges

I 95 /ST128 over RR Mbta/Bmrr

Poor

Middlesex County, Massachusetts · 1.6 KM W of I-93 & I-95 · Structure no. W430262FCDOTNBI

Built
1950
75 years old, rebuilt 1961
Condition
Poor
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
124 ft
3 main spans
Daily traffic
192,672
2023 count
Owner
State
State Highway Agency

About this bridge

I 95 /ST128 over RR Mbta/Bmrr is a steel continuous stringer/multi-beam or girder carrying I 95 /ST128 over RR Mbta/Bmrr in Middlesex County, Massachusetts. It was built in 1950 and reconstructed in 1961, so it is 75 years old, older than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 192,672 vehicles a day, roughly 4% of them trucks, projected to reach 284,906 by 2031. The structure is 124 ft (37.8 m) long and 147 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI 95 /ST128
CrossesRR Mbta/Bmrr
Location1.6 KM W of I-93 & I-95
RouteInterstate 128
CountyMiddlesex County
StateMassachusetts
Coordinates42.50211, -71.13653
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.7 US tons
Inventory rating37.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length124 ft (37.8 m)
Longest span44 ft (13.4 m)
Deck width147 ft (44.9 m)
Roadway width140 ft (42.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic192,672 (2023)
Projected traffic284,906 by 2031
Trucks4%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed0.6 mi (1 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 statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$16.6 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 95 /ST128 over RR Mbta/Bmrr built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1961.

What condition is I 95 /ST128 over RR Mbta/Bmrr in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.

How much traffic does I 95 /ST128 over RR Mbta/Bmrr carry?

About 192,672 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is I 95 /ST128 over RR Mbta/Bmrr?

The structure is 124 ft (37.8 m) long with a longest span of 44 ft (13.4 m) and a deck 147 ft wide.

Who owns I 95 /ST128 over RR Mbta/Bmrr?

It is owned by the State Highway Agency.