US Bridges

HWY Quincy Shore over ST 3 A/Hnck Nb&mbta&red

Fair

Suffolk County, Massachusetts · .2 MI E of I 93 · Structure no. B163904FRDOTNBI

Built
1970
55 years old, rebuilt 2012
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
1,503 ft
16 main spans
Daily traffic
52,597
2023 count
Owner
State
State Highway Agency

About this bridge

HWY Quincy Shore over ST 3 A/Hnck Nb&mbta&red is a steel stringer/multi-beam or girder carrying HWY Quincy Shore over ST 3 A/Hnck Nb&mbta&red in Suffolk County, Massachusetts. It was built in 1970 and reconstructed in 2012, so it is 55 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 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 52,597 vehicles a day, roughly 3% of them trucks, projected to reach 47,922 by 2032. The structure is 1,503 ft (458 m) long and 65 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesHWY Quincy Shore
CrossesST 3 A/Hnck Nb&mbta&red
Location.2 MI E of I 93
RouteState Highway 3A
CountySuffolk County
StateMassachusetts
Coordinates42.28215, -71.03629
Functional classUrban Minor 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 inspectionMarch 2023
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 alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating56.4 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans16
Design loadHS 20
Structure length1,503 ft (458 m)
Longest span110 ft (33.5 m)
Deck width65 ft (19.7 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic52,597 (2023)
Projected traffic47,922 by 2032
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed3.7 mi (6 km)
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$88.1 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Quincy Shore over ST 3 A/Hnck Nb&mbta&red built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2012.

What condition is HWY Quincy Shore over ST 3 A/Hnck Nb&mbta&red 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 March 2023.

How much traffic does HWY Quincy Shore over ST 3 A/Hnck Nb&mbta&red carry?

About 52,597 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is HWY Quincy Shore over ST 3 A/Hnck Nb&mbta&red?

The structure is 1,503 ft (458 m) long with a longest span of 110 ft (33.5 m) and a deck 65 ft wide.

Who owns HWY Quincy Shore over ST 3 A/Hnck Nb&mbta&red?

It is owned by the State Highway Agency.