US Bridges

CR 523 over Middle Brook

Fair

Somerset County, New Jersey · 0.10 MI S of Large Cross · Structure no. 18D1110

Built
2001
24 years old
Condition
Fair
inspected August 2023
Type
Frame
Concrete
Length
22 ft
1 main span
Daily traffic
5,603
2023 count
Owner
County
County Highway Agency

About this bridge

CR 523 over Middle Brook is a concrete frame carrying CR 523 over Middle Brook in Somerset County, New Jersey. It was built in 2001, so it is 24 years old, younger 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 5,603 vehicles a day, roughly 3% of them trucks, projected to reach 6,723 by 2043. The structure is 22 ft (6.7 m) long and 38 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCR 523
CrossesMiddle Brook
Location0.10 MI S of Large Cross
RouteCounty Highway 523
CountySomerset County
StateNew Jersey
Coordinates40.66857, -74.68236
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
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.1 US tons
Inventory rating36 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 25 or greater
Structure length22 ft (6.7 m)
Longest span20 ft (6.1 m)
Deck width38 ft (11.5 m)
Roadway width33 ft (10 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,603 (2023)
Projected traffic6,723 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 CR 523 over Middle Brook built?

It was built in 2001, making it 24 years old in 2025.

What condition is CR 523 over Middle 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 August 2023.

How much traffic does CR 523 over Middle Brook carry?

About 5,603 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is CR 523 over Middle Brook?

The structure is 22 ft (6.7 m) long with a longest span of 20 ft (6.1 m) and a deck 38 ft wide.

Who owns CR 523 over Middle Brook?

It is owned by the County Highway Agency.