US Bridges

Amwell RD (cr 514) over Millstone River

Fair

Somerset County, New Jersey · 0.07 MI E of CR 533 JCT · Structure no. 18G0505

Built
1930
95 years old, rebuilt 1998
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
815 ft
3 main spans
Daily traffic
15,328
2023 count
Owner
County
County Highway Agency

About this bridge

Amwell RD (cr 514) over Millstone River is a steel continuous stringer/multi-beam or girder carrying Amwell RD (cr 514) over Millstone River in Somerset County, New Jersey. It was built in 1930 and reconstructed in 1998, so it is 95 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 15,328 vehicles a day, roughly 4% of them trucks, projected to reach 18,703 by 2043. The structure is 815 ft (248.4 m) long and 36 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesAmwell RD (cr 514)
CrossesMillstone River
Location0.07 MI E of CR 533 JCT
RouteCounty Highway 514
CountySomerset County
StateNew Jersey
Coordinates40.50275, -74.58745
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 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 Continuous
DeckConcrete, cast-in-place
Main spans3 (+25 approach)
Design loadHS 20 + Mod
Structure length815 ft (248.4 m)
Longest span45 ft (13.7 m)
Deck width36 ft (11 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,328 (2023)
Projected traffic18,703 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 statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Amwell RD (cr 514) over Millstone River built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1998.

What condition is Amwell RD (cr 514) over Millstone 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 September 2023.

How much traffic does Amwell RD (cr 514) over Millstone River carry?

About 15,328 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Amwell RD (cr 514) over Millstone River?

The structure is 815 ft (248.4 m) long with a longest span of 45 ft (13.7 m) and a deck 36 ft wide.

Who owns Amwell RD (cr 514) over Millstone River?

It is owned by the County Highway Agency.