US Bridges

I 95 ST128 over HWY Quinobequin RD

Poor

Middlesex County, Massachusetts · 0.3 MI Sly Rt 16 · Structure no. N120592FMDOTNBI

Built
1950
75 years old, rebuilt 1961
Condition
Poor
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
95 ft
1 main span
Daily traffic
142,579
2021 count
Owner
State
State Highway Agency

About this bridge

I 95 ST128 over HWY Quinobequin RD is a steel stringer/multi-beam or girder carrying I 95 ST128 over HWY Quinobequin RD 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 142,579 vehicles a day, roughly 7% of them trucks, projected to reach 252,688 by 2032. The structure is 95 ft (29 m) long and 146 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesI 95 ST128
CrossesHWY Quinobequin RD
Location0.3 MI Sly Rt 16
RouteInterstate 95
Coordinates42.32571, -71.25005
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment7: Better than present minimum criteria
Operating rating55.8 US tons
Inventory rating24.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length95 ft (29 m)
Longest span89 ft (27.1 m)
Deck width146 ft (44.6 m)
Roadway width120 ft (36.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic142,579 (2021)
Projected traffic252,688 by 2032
Trucks7%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$26.5 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 95 ST128 over HWY Quinobequin RD 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 HWY Quinobequin RD 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 February 2023.

How much traffic does I 95 ST128 over HWY Quinobequin RD carry?

About 142,579 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is I 95 ST128 over HWY Quinobequin RD?

The structure is 95 ft (29 m) long with a longest span of 89 ft (27.1 m) and a deck 146 ft wide.

Who owns I 95 ST128 over HWY Quinobequin RD?

It is owned by the State Highway Agency.