US Bridges

Troy Road over Whippany River

Good

Morris County, New Jersey · 1.9MI E of CR637&NJ10 JCT · Structure no. 1400425

Built
2007
18 years old
Condition
Good
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
74 ft
1 main span
Daily traffic
5,491
2023 count
Owner
County
County Highway Agency

About this bridge

Troy Road over Whippany River is a prestressed concrete box beam or girders - multiple carrying Troy Road over Whippany River in Morris County, New Jersey. It was built in 2007, so it is 18 years old, younger than the New Jersey average of 58.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,491 vehicles a day, roughly 4% of them trucks, projected to reach 6,589 by 2043. The structure is 74 ft (22.6 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesTroy Road
CrossesWhippany River
Location1.9MI E of CR637&NJ10 JCT
RouteCity Street 0
Coordinates40.82438, -74.37063
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating65 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length74 ft (22.6 m)
Longest span69 ft (21 m)
Deck width39 ft (12 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,491 (2023)
Projected traffic6,589 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Troy Road over Whippany River built?

It was built in 2007, making it 18 years old in 2025.

What condition is Troy Road over Whippany River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does Troy Road over Whippany River carry?

About 5,491 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Troy Road over Whippany River?

The structure is 74 ft (22.6 m) long with a longest span of 69 ft (21 m) and a deck 39 ft wide.

Who owns Troy Road over Whippany River?

It is owned by the County Highway Agency.