US Bridges

Nj 173 over Musconetcong River

Fair

Warren County, New Jersey · 3.15 MI East of US Rt 22 · Structure no. 2103153

Built
1925
100 years old, rebuilt 2010
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
158 ft
3 main spans
Daily traffic
6,520
2022 count
Owner
State
State Highway Agency

About this bridge

Nj 173 over Musconetcong River is a prestressed concrete box beam or girders - multiple carrying Nj 173 over Musconetcong River in Warren County, New Jersey. It was built in 1925 and reconstructed in 2010, so it is 100 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.

It carries about 6,520 vehicles a day, roughly 4% of them trucks, projected to reach 7,824 by 2042. The structure is 158 ft (48.2 m) long and 35 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNj 173
CrossesMusconetcong River
Location3.15 MI East of US Rt 22
RouteState Highway 173
CountyWarren County
StateNew Jersey
Coordinates40.65917, -75.08101
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating70.8 US tons
Inventory rating56.4 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length158 ft (48.2 m)
Longest span53 ft (16.2 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,520 (2022)
Projected traffic7,824 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$1,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nj 173 over Musconetcong River built?

It was built in 1925, making it 100 years old in 2025. It was reconstructed in 2010.

What condition is Nj 173 over Musconetcong 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 August 2024.

How much traffic does Nj 173 over Musconetcong River carry?

About 6,520 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Nj 173 over Musconetcong River?

The structure is 158 ft (48.2 m) long with a longest span of 53 ft (16.2 m) and a deck 35 ft wide.

Who owns Nj 173 over Musconetcong River?

It is owned by the State Highway Agency.