US Bridges

Roys Bridge over Big Flat Brook

FairPosted for load

Sussex County, New Jersey · .1 M.E.RT615 4.3M.S.RT206 · Structure no. 3461002

Built
1900
125 years old
Condition
Fair
inspected September 2023
Type
Truss - Thru
Steel
Length
67 ft
1 main span
Daily traffic
31
2023 count
Owner
State
Other State Agency

About this bridge

Roys Bridge over Big Flat Brook is a steel truss - thru carrying Roys Bridge over Big Flat Brook in Sussex County, New Jersey. It was built in 1900, so it is 125 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. Its operating status is: posted for load restriction.

It carries about 31 vehicles a day, projected to reach 38 by 2043. The structure is 67 ft (20.4 m) long and 12 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesRoys Bridge
CrossesBig Flat Brook
Location.1 M.E.RT615 4.3M.S.RT206
RouteState Lands Road 0
CountySussex County
StateNew Jersey
Coordinates41.17873, -74.86161
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating16 US tons
Inventory rating10 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length67 ft (20.4 m)
Longest span63 ft (19.2 m)
Deck width12 ft (3.7 m)
Roadway width11 ft (3.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31 (2023)
Projected traffic38 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther State Agency
Maintained byOther State Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.3 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Roys Bridge over Big Flat Brook built?

It was built in 1900, making it 125 years old in 2025.

What condition is Roys Bridge over Big Flat 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 September 2023.

How much traffic does Roys Bridge over Big Flat Brook carry?

About 31 vehicles per day (2023 count).

How long is Roys Bridge over Big Flat Brook?

The structure is 67 ft (20.4 m) long with a longest span of 63 ft (19.2 m) and a deck 12 ft wide.

Who owns Roys Bridge over Big Flat Brook?

It is owned by the Other State Agency.