US Bridges

County Rt 646 over No.Br Rancocas Creek

Fair

Burlington County, New Jersey · 0.14 MI N of C.R. 645 · Structure no. 03F4120

Built
1953
72 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
55 ft
1 main span
Daily traffic
3,858
2023 count
Owner
County
County Highway Agency

About this bridge

County Rt 646 over No.Br Rancocas Creek is a steel stringer/multi-beam or girder carrying County Rt 646 over No.Br Rancocas Creek in Burlington County, New Jersey. It was built in 1953, so it is 72 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 3,858 vehicles a day, roughly 3% of them trucks, projected to reach 4,708 by 2043. The structure is 55 ft (16.8 m) long and 41 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesCounty Rt 646
CrossesNo.Br Rancocas Creek
Location0.14 MI N of C.R. 645
RouteCounty Highway 646
CountyBurlington County
StateNew Jersey
Coordinates39.96002, -74.62905
Functional classUrban Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating58 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length55 ft (16.8 m)
Longest span50 ft (15.2 m)
Deck width41 ft (12.5 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,858 (2023)
Projected traffic4,708 by 2043
Trucks3%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Rt 646 over No.Br Rancocas Creek built?

It was built in 1953, making it 72 years old in 2025.

What condition is County Rt 646 over No.Br Rancocas 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 September 2023.

How much traffic does County Rt 646 over No.Br Rancocas Creek carry?

About 3,858 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is County Rt 646 over No.Br Rancocas Creek?

The structure is 55 ft (16.8 m) long with a longest span of 50 ft (15.2 m) and a deck 41 ft wide.

Who owns County Rt 646 over No.Br Rancocas Creek?

It is owned by the County Highway Agency.