US Bridges

ST129 Walnut ST over US 1 Broadway

Fair

Essex County, Massachusetts · .8 KM N Lynn Fells Pkwy · Structure no. S0501631CDOTNBI

Built
1964
61 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
166 ft
2 main spans
Daily traffic
34,267
2019 count
Owner
State
State Highway Agency

About this bridge

ST129 Walnut ST over US 1 Broadway is a steel stringer/multi-beam or girder carrying ST129 Walnut ST over US 1 Broadway in Essex County, Massachusetts. It was built in 1964, so it is 61 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 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 34,267 vehicles a day, roughly 8% of them trucks, projected to reach 30,796 by 2032. The structure is 166 ft (50.7 m) long and 52 ft wide.

Location

Open in Google Maps
CarriesST129 Walnut ST
CrossesUS 1 Broadway
Location.8 KM N Lynn Fells Pkwy
RouteState Highway 129
CountyEssex County
StateMassachusetts
Coordinates42.48896, -71.01716
Functional classUrban Other Principal Arterial

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 inspectionSeptember 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating53.5 US tons
Inventory rating32.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length166 ft (50.7 m)
Longest span80 ft (24.4 m)
Deck width52 ft (15.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,267 (2019)
Projected traffic30,796 by 2032
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$7.9 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST129 Walnut ST over US 1 Broadway built?

It was built in 1964, making it 61 years old in 2025.

What condition is ST129 Walnut ST over US 1 Broadway 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 September 2023.

How much traffic does ST129 Walnut ST over US 1 Broadway carry?

About 34,267 vehicles per day (2019 count), of which roughly 8% are trucks.

How long is ST129 Walnut ST over US 1 Broadway?

The structure is 166 ft (50.7 m) long with a longest span of 80 ft (24.4 m) and a deck 52 ft wide.

Who owns ST129 Walnut ST over US 1 Broadway?

It is owned by the State Highway Agency.