US Bridges

Flatbrook-Millbroo over Vancampens Brook

Fair

Sussex County, New Jersey · At Millbrook Village on C · Structure no. 4320042P0000000

Built
1960
65 years old
Condition
Fair
inspected January 2024
Type
Slab
Prestressed Concrete
Length
20 ft
1 main span
Daily traffic
216
2022 count
Owner
Federal
National Park Service

About this bridge

Flatbrook-Millbroo over Vancampens Brook is a prestressed concrete slab carrying Flatbrook-Millbroo over Vancampens Brook in Sussex County, New Jersey. It was built in 1960, so it is 65 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 216 vehicles a day, roughly 7% of them trucks, projected to reach 259 by 2042. The structure is 20 ft (6.2 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesFlatbrook-Millbroo
CrossesVancampens Brook
LocationAt Millbrook Village on C
RouteFederal Lands Road 0
CountySussex County
StateNew Jersey
Coordinates41.07281, -74.96258
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.1 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length20 ft (6.2 m)
Longest span18 ft (5.5 m)
Deck width27 ft (8.3 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic216 (2022)
Projected traffic259 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNational Park Service
Maintained byNational Park Service
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$111,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Flatbrook-Millbroo over Vancampens Brook built?

It was built in 1960, making it 65 years old in 2025.

What condition is Flatbrook-Millbroo over Vancampens 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 January 2024.

How much traffic does Flatbrook-Millbroo over Vancampens Brook carry?

About 216 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Flatbrook-Millbroo over Vancampens Brook?

The structure is 20 ft (6.2 m) long with a longest span of 18 ft (5.5 m) and a deck 27 ft wide.

Who owns Flatbrook-Millbroo over Vancampens Brook?

It is owned by the National Park Service.