US Bridges

ST 3 A/Main ST over ST 3 Pilgrim HWY

Fair

Plymouth County, Massachusetts · .8 MI N of Plymouth Tl · Structure no. K0101546UDOTNBI

Built
1948
77 years old, rebuilt 2003
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
120 ft
2 main spans
Daily traffic
29,612
2024 count
Owner
State
State Highway Agency

About this bridge

ST 3 A/Main ST over ST 3 Pilgrim HWY is a steel continuous stringer/multi-beam or girder carrying ST 3 A/Main ST over ST 3 Pilgrim HWY in Plymouth County, Massachusetts. It was built in 1948 and reconstructed in 2003, so it is 77 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 29,612 vehicles a day, roughly 4% of them trucks, projected to reach 64,751 by 2031. The structure is 120 ft (36.6 m) long and 54 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesST 3 A/Main ST
CrossesST 3 Pilgrim HWY
Location.8 MI N of Plymouth Tl
RouteState Highway 3A
CountyPlymouth County
StateMassachusetts
Coordinates41.98811, -70.71749
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating102 US tons
Inventory rating61.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length120 ft (36.6 m)
Longest span58 ft (17.7 m)
Deck width54 ft (16.5 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,612 (2024)
Projected traffic64,751 by 2031
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 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$1 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST 3 A/Main ST over ST 3 Pilgrim HWY built?

It was built in 1948, making it 77 years old in 2025. It was reconstructed in 2003.

What condition is ST 3 A/Main ST over ST 3 Pilgrim HWY 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 November 2024.

How much traffic does ST 3 A/Main ST over ST 3 Pilgrim HWY carry?

About 29,612 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is ST 3 A/Main ST over ST 3 Pilgrim HWY?

The structure is 120 ft (36.6 m) long with a longest span of 58 ft (17.7 m) and a deck 54 ft wide.

Who owns ST 3 A/Main ST over ST 3 Pilgrim HWY?

It is owned by the State Highway Agency.