US Bridges

Mountain Road over S Branch Rockaway Creek

FairPosted for load

Hunterdon County, New Jersey · 0.1MI. N. Weather Hill RD · Structure no. 1000133

Built
1924
101 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
28 ft
1 main span
Daily traffic
394
2023 count
Owner
County
County Highway Agency

About this bridge

Mountain Road over S Branch Rockaway Creek is a steel stringer/multi-beam or girder carrying Mountain Road over S Branch Rockaway Creek in Hunterdon County, New Jersey. It was built in 1924, so it is 101 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 6 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 394 vehicles a day, roughly 1% of them trucks, projected to reach 480 by 2043. The structure is 28 ft (8.5 m) long and 20 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesMountain Road
CrossesS Branch Rockaway Creek
Location0.1MI. N. Weather Hill RD
RouteCity Street 0
CountyHunterdon County
StateNew Jersey
Coordinates40.6255, -74.79134
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating40 US tons
Inventory rating24 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span25 ft (7.6 m)
Deck width20 ft (6.1 m)
Roadway width18 ft (5.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic394 (2023)
Projected traffic480 by 2043
Trucks1%
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 statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$172,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mountain Road over S Branch Rockaway Creek built?

It was built in 1924, making it 101 years old in 2025.

What condition is Mountain Road over S Branch Rockaway Creek 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 April 2023.

How much traffic does Mountain Road over S Branch Rockaway Creek carry?

About 394 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Mountain Road over S Branch Rockaway Creek?

The structure is 28 ft (8.5 m) long with a longest span of 25 ft (7.6 m) and a deck 20 ft wide.

Who owns Mountain Road over S Branch Rockaway Creek?

It is owned by the County Highway Agency.