US Bridges

Nj 47 over Manumuskin River

Fair

Cumberland County, New Jersey · 5.5MI SE of NJ49&NJ55 JCT · Structure no. 0601151

Built
1930
95 years old, rebuilt 1992
Condition
Fair
inspected July 2023
Type
Girder and Floorbeam System
Steel
Length
204 ft
2 main spans
Daily traffic
19,874
2023 count
Owner
State
State Highway Agency

About this bridge

Nj 47 over Manumuskin River is a steel girder and floorbeam system carrying Nj 47 over Manumuskin River in Cumberland County, New Jersey. It was built in 1930 and reconstructed in 1992, so it is 95 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 19,874 vehicles a day, roughly 7% of them trucks, projected to reach 24,251 by 2043. The structure is 204 ft (62.2 m) long and 42 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesNj 47
CrossesManumuskin River
Location5.5MI SE of NJ49&NJ55 JCT
RouteState Highway 47
CountyCumberland County
StateNew Jersey
Coordinates39.31515, -74.98402
Functional classRural Principal Arterial - Other

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71 US tons
Inventory rating43 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadUnknown
Structure length204 ft (62.2 m)
Longest span58 ft (17.7 m)
Deck width42 ft (12.7 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,874 (2023)
Projected traffic24,251 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemYes

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$991,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nj 47 over Manumuskin River built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1992.

What condition is Nj 47 over Manumuskin 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 July 2023.

How much traffic does Nj 47 over Manumuskin River carry?

About 19,874 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Nj 47 over Manumuskin River?

The structure is 204 ft (62.2 m) long with a longest span of 58 ft (17.7 m) and a deck 42 ft wide.

Who owns Nj 47 over Manumuskin River?

It is owned by the State Highway Agency.