US Bridges

ST 3 over HWY Summer ST

Fair

Norfolk County, Massachusetts · .16 KM E Braintree T.L. · Structure no. W32021355DOTNBI

Built
1957
68 years old, rebuilt 1978
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
63 ft
1 main span
Daily traffic
236,250
2023 count
Owner
State
State Highway Agency

About this bridge

ST 3 over HWY Summer ST is a steel stringer/multi-beam or girder carrying ST 3 over HWY Summer ST in Norfolk County, Massachusetts. It was built in 1957 and reconstructed in 1978, so it is 68 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 236,250 vehicles a day, roughly 5% of them trucks, projected to reach 224,103 by 2032. The structure is 63 ft (19.1 m) long and 116 ft wide.

Location

Open in Google Maps
CarriesST 3
CrossesHWY Summer ST
Location.16 KM E Braintree T.L.
RouteState Highway 3
CountyNorfolk County
StateMassachusetts
Coordinates42.19955, -70.97009
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.8 US tons
Inventory rating40.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length63 ft (19.1 m)
Longest span56 ft (17 m)
Deck width116 ft (35.5 m)
Roadway width110 ft (33.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic236,250 (2023)
Projected traffic224,103 by 2032
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
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$6.9 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST 3 over HWY Summer ST built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1978.

What condition is ST 3 over HWY Summer 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 June 2023.

How much traffic does ST 3 over HWY Summer ST carry?

About 236,250 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is ST 3 over HWY Summer ST?

The structure is 63 ft (19.1 m) long with a longest span of 56 ft (17 m) and a deck 116 ft wide.

Who owns ST 3 over HWY Summer ST?

It is owned by the State Highway Agency.