US Bridges

ST128 over ST 97 Cabot ST

Fair

Essex County, Massachusetts · 500 West of Dodge ST · Structure no. B110092TWDOTNBI

Built
1947
78 years old
Condition
Fair
inspected December 2023
Type
Frame
Concrete
Length
57 ft
1 main span
Daily traffic
76,198
2023 count
Owner
State
State Highway Agency

About this bridge

ST128 over ST 97 Cabot ST is a concrete frame carrying ST128 over ST 97 Cabot ST in Essex County, Massachusetts. It was built in 1947, so it is 78 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 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 76,198 vehicles a day, roughly 5% of them trucks, projected to reach 72,427 by 2032. The structure is 57 ft (17.4 m) long and 86 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesST128
CrossesST 97 Cabot ST
Location500 West of Dodge ST
RouteState Highway 128
CountyEssex County
StateMassachusetts
Coordinates42.57436, -70.89525
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
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating89.3 US tons
Inventory rating52.6 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length57 ft (17.4 m)
Longest span57 ft (17.4 m)
Deck width86 ft (26.3 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic76,198 (2023)
Projected traffic72,427 by 2032
Trucks5%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$599,000 (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST128 over ST 97 Cabot ST built?

It was built in 1947, making it 78 years old in 2025.

What condition is ST128 over ST 97 Cabot 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 December 2023.

How much traffic does ST128 over ST 97 Cabot ST carry?

About 76,198 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is ST128 over ST 97 Cabot ST?

The structure is 57 ft (17.4 m) long with a longest span of 57 ft (17.4 m) and a deck 86 ft wide.

Who owns ST128 over ST 97 Cabot ST?

It is owned by the State Highway Agency.