US Bridges

Roycefield Road over Dukes Brook

Fair

Somerset County, New Jersey · At Dukes Pkwy Intersectn · Structure no. 18E0703

Built
1925
100 years old
Condition
Fair
inspected October 2023
Type
Arch - Deck
Masonry
Length
24 ft
1 main span
Daily traffic
2,810
2023 count
Owner
County
County Highway Agency

About this bridge

Roycefield Road over Dukes Brook is a masonry arch - deck carrying Roycefield Road over Dukes Brook in Somerset County, New Jersey. It was built in 1925, so it is 100 years old, older than the New Jersey average of 58.5 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 2,810 vehicles a day, projected to reach 3,372 by 2043. The structure is 24 ft (7.3 m) long and 24 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesRoycefield Road
CrossesDukes Brook
LocationAt Dukes Pkwy Intersectn
CountySomerset County
StateNew Jersey
Coordinates40.542, -74.63997
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating47 US tons
Inventory rating28 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans1
Design loadH 20
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width24 ft (7.3 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,810 (2023)
Projected traffic3,372 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.2 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Roycefield Road over Dukes Brook built?

It was built in 1925, making it 100 years old in 2025.

What condition is Roycefield Road over Dukes Brook 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 October 2023.

How much traffic does Roycefield Road over Dukes Brook carry?

About 2,810 vehicles per day (2023 count).

How long is Roycefield Road over Dukes Brook?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m) and a deck 24 ft wide.

Who owns Roycefield Road over Dukes Brook?

It is owned by the County Highway Agency.