US Bridges

County Route 665 over Lamington River

Fair

Somerset County, New Jersey · 1.18 MI N CR 614 · Structure no. 18D1001

Built
1988
37 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
133 ft
2 main spans
Daily traffic
10,424
2023 count
Owner
County
County Highway Agency

About this bridge

County Route 665 over Lamington River is a prestressed concrete box beam or girders - multiple carrying County Route 665 over Lamington River in Somerset County, New Jersey. It was built in 1988, so it is 37 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 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 10,424 vehicles a day, roughly 4% of them trucks, projected to reach 12,509 by 2043. The structure is 133 ft (40.5 m) long and 49 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCounty Route 665
CrossesLamington River
Location1.18 MI N CR 614
RouteCounty Highway 665
CountySomerset County
StateNew Jersey
Coordinates40.62226, -74.69974
Functional classRural Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating48 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length133 ft (40.5 m)
Longest span63 ft (19.2 m)
Deck width49 ft (15 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,424 (2023)
Projected traffic12,509 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$780,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Route 665 over Lamington River built?

It was built in 1988, making it 37 years old in 2025.

What condition is County Route 665 over Lamington 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 August 2023.

How much traffic does County Route 665 over Lamington River carry?

About 10,424 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is County Route 665 over Lamington River?

The structure is 133 ft (40.5 m) long with a longest span of 63 ft (19.2 m) and a deck 49 ft wide.

Who owns County Route 665 over Lamington River?

It is owned by the County Highway Agency.