US Bridges

ST 24 NB Curve G over ST 24 SB Curve S

Fair

Norfolk County, Massachusetts · .16 KM S of I 93 · Structure no. R01006344DOTNBI

Built
1958
67 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
85 ft
1 main span
Daily traffic
58,448
2023 count
Owner
State
State Highway Agency

About this bridge

ST 24 NB Curve G over ST 24 SB Curve S is a steel stringer/multi-beam or girder carrying ST 24 NB Curve G over ST 24 SB Curve S in Norfolk County, Massachusetts. It was built in 1958, so it is 67 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 58,448 vehicles a day, roughly 8% of them trucks, projected to reach 60,013 by 2032. The structure is 85 ft (25.8 m) long and 45 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesST 24 NB Curve G
CrossesST 24 SB Curve S
Location.16 KM S of I 93
RouteState Highway 24
CountyNorfolk County
StateMassachusetts
Coordinates42.20103, -71.07896
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 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 geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating85.4 US tons
Inventory rating51.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length85 ft (25.8 m)
Longest span75 ft (22.9 m)
Deck width45 ft (13.8 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58,448 (2023)
Projected traffic60,013 by 2032
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$3.5 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST 24 NB Curve G over ST 24 SB Curve S built?

It was built in 1958, making it 67 years old in 2025.

What condition is ST 24 NB Curve G over ST 24 SB Curve S 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 ST 24 NB Curve G over ST 24 SB Curve S carry?

About 58,448 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is ST 24 NB Curve G over ST 24 SB Curve S?

The structure is 85 ft (25.8 m) long with a longest span of 75 ft (22.9 m) and a deck 45 ft wide.

Who owns ST 24 NB Curve G over ST 24 SB Curve S?

It is owned by the State Highway Agency.