US Bridges

Prospect Street over Del-Raritan ST Prk Trail

Poor

Mercer County, New Jersey · 0.57 MI South of Nj 31 · Structure no. 1151162

Built
1913
112 years old
Condition
Poor
inspected September 2024
Type
Girder and Floorbeam System
Steel
Length
35 ft
1 main span
Daily traffic
6,876
2024 count
Owner
Unknown
Unknown

About this bridge

Prospect Street over Del-Raritan ST Prk Trail is a steel girder and floorbeam system carrying Prospect Street over Del-Raritan ST Prk Trail in Mercer County, New Jersey. It was built in 1913, so it is 112 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 6,876 vehicles a day, roughly 4% of them trucks, projected to reach 8,251 by 2044. The structure is 35 ft (10.7 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesProspect Street
CrossesDel-Raritan ST Prk Trail
Location0.57 MI South of Nj 31
RouteCity Street 0
Coordinates40.2278, -74.77668
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
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
Approach roadway alignment6: Equal to present minimum criteria
Operating rating41 US tons
Inventory rating25 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length35 ft (10.7 m)
Longest span34 ft (10.4 m)
Deck width34 ft (10.5 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,876 (2024)
Projected traffic8,251 by 2044
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesOther
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerUnknown
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck replacement with only incidental widening
Estimated improvement cost$647,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Prospect Street over Del-Raritan ST Prk Trail built?

It was built in 1913, making it 112 years old in 2025.

What condition is Prospect Street over Del-Raritan ST Prk Trail in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.

How much traffic does Prospect Street over Del-Raritan ST Prk Trail carry?

About 6,876 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is Prospect Street over Del-Raritan ST Prk Trail?

The structure is 35 ft (10.7 m) long with a longest span of 34 ft (10.4 m) and a deck 34 ft wide.

Who owns Prospect Street over Del-Raritan ST Prk Trail?

It is owned by the Unknown and maintained by the State Highway Agency.