US Bridges

Millstone Road over Millstone River

Good

Mercer County, New Jersey · 0.8 MI N of CR 535 · Structure no. 1108601

Built
2013
12 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
76 ft
1 main span
Daily traffic
6,082
2023 count
Owner
County
County Highway Agency

About this bridge

Millstone Road over Millstone River is a steel stringer/multi-beam or girder carrying Millstone Road over Millstone River in Mercer County, New Jersey. It was built in 2013, so it is 12 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,082 vehicles a day, roughly 3% of them trucks, projected to reach 7,274 by 2043. The structure is 76 ft (23.2 m) long and 45 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMillstone Road
CrossesMillstone River
Location0.8 MI N of CR 535
RouteCity Street 0
CountyMercer County
StateNew Jersey
Coordinates40.29692, -74.56295
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
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 alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating68.6 US tons
Inventory rating52.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length76 ft (23.2 m)
Longest span70 ft (21.3 m)
Deck width45 ft (13.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,082 (2023)
Projected traffic7,274 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 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 Millstone Road over Millstone River built?

It was built in 2013, making it 12 years old in 2025.

What condition is Millstone Road over Millstone River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2023.

How much traffic does Millstone Road over Millstone River carry?

About 6,082 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Millstone Road over Millstone River?

The structure is 76 ft (23.2 m) long with a longest span of 70 ft (21.3 m) and a deck 45 ft wide.

Who owns Millstone Road over Millstone River?

It is owned by the County Highway Agency.