US Bridges

CR 560 over Big Flat Brook

Fair

Sussex County, New Jersey · 0.70 MI West of US 206 · Structure no. 1900P06

Built
1957
68 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
82 ft
1 main span
Daily traffic
5,296
2023 count
Owner
County
County Highway Agency

About this bridge

CR 560 over Big Flat Brook is a steel stringer/multi-beam or girder carrying CR 560 over Big Flat Brook in Sussex County, New Jersey. It was built in 1957, so it is 68 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 5,296 vehicles a day, roughly 3% of them trucks, projected to reach 6,355 by 2043. The structure is 82 ft (25 m) long and 39 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCR 560
CrossesBig Flat Brook
Location0.70 MI West of US 206
RouteCounty Highway 560
CountySussex County
StateNew Jersey
Coordinates41.20006, -74.81565
Functional classRural Major 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92 US tons
Inventory rating55 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length82 ft (25 m)
Longest span78 ft (23.8 m)
Deck width39 ft (12 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,296 (2023)
Projected traffic6,355 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$424,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 560 over Big Flat Brook built?

It was built in 1957, making it 68 years old in 2025.

What condition is CR 560 over Big Flat Brook 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 March 2023.

How much traffic does CR 560 over Big Flat Brook carry?

About 5,296 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is CR 560 over Big Flat Brook?

The structure is 82 ft (25 m) long with a longest span of 78 ft (23.8 m) and a deck 39 ft wide.

Who owns CR 560 over Big Flat Brook?

It is owned by the County Highway Agency.