US Bridges

West Mountain Rd. over Wallkill River

Fair

Sussex County, New Jersey · 0.2 MI NW of CR 517 · Structure no. 1900Q19

Built
1959
66 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
36 ft
1 main span
Daily traffic
3,541
2023 count
Owner
County
County Highway Agency

About this bridge

West Mountain Rd. over Wallkill River is a steel stringer/multi-beam or girder carrying West Mountain Rd. over Wallkill River in Sussex County, New Jersey. It was built in 1959, so it is 66 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 3,541 vehicles a day, roughly 3% of them trucks, projected to reach 4,320 by 2043. The structure is 36 ft (11 m) long and 42 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesWest Mountain Rd.
CrossesWallkill River
Location0.2 MI NW of CR 517
RouteCity Street 0
CountySussex County
StateNew Jersey
Coordinates41.0538, -74.62197
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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length36 ft (11 m)
Longest span33 ft (10.1 m)
Deck width42 ft (12.9 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,541 (2023)
Projected traffic4,320 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was West Mountain Rd. over Wallkill River built?

It was built in 1959, making it 66 years old in 2025.

What condition is West Mountain Rd. over Wallkill River 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 February 2023.

How much traffic does West Mountain Rd. over Wallkill River carry?

About 3,541 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is West Mountain Rd. over Wallkill River?

The structure is 36 ft (11 m) long with a longest span of 33 ft (10.1 m) and a deck 42 ft wide.

Who owns West Mountain Rd. over Wallkill River?

It is owned by the County Highway Agency.