US Bridges

I 95 SB/ST128 SB over ST 38 Sb/Main ST

Fair

Middlesex County, Massachusetts · Rt 128 at Rt 38 · Structure no. W430222F9DOTNBI

Built
1949
76 years old, rebuilt 1961
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
123 ft
3 main spans
Daily traffic
97,354
2024 count
Owner
State
State Highway Agency

About this bridge

I 95 SB/ST128 SB over ST 38 Sb/Main ST is a steel continuous stringer/multi-beam or girder carrying I 95 SB/ST128 SB over ST 38 Sb/Main ST in Middlesex County, Massachusetts. It was built in 1949 and reconstructed in 1961, so it is 76 years old, older 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 5 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 97,354 vehicles a day, roughly 7% of them trucks, projected to reach 281,115 by 2031. The structure is 123 ft (37.5 m) long and 68 ft wide.

Location

Open in Google Maps
CarriesI 95 SB/ST128 SB
CrossesST 38 Sb/Main ST
LocationRt 128 at Rt 38
RouteInterstate 128
CountyMiddlesex County
StateMassachusetts
Coordinates42.49941, -71.15809
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating57.7 US tons
Inventory rating34.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length123 ft (37.5 m)
Longest span44 ft (13.4 m)
Deck width68 ft (20.7 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic97,354 (2024)
Projected traffic281,115 by 2031
Trucks7%
Lanes on structure4
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$7.7 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 95 SB/ST128 SB over ST 38 Sb/Main ST built?

It was built in 1949, making it 76 years old in 2025. It was reconstructed in 1961.

What condition is I 95 SB/ST128 SB over ST 38 Sb/Main ST 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 2024.

How much traffic does I 95 SB/ST128 SB over ST 38 Sb/Main ST carry?

About 97,354 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is I 95 SB/ST128 SB over ST 38 Sb/Main ST?

The structure is 123 ft (37.5 m) long with a longest span of 44 ft (13.4 m) and a deck 68 ft wide.

Who owns I 95 SB/ST128 SB over ST 38 Sb/Main ST?

It is owned by the State Highway Agency.