US Bridges

Nj 10 over Mill Brook

Fair

Morris County, New Jersey · 3.5 MI West of Rt 53 · Structure no. 1401156

Built
1932
93 years old, rebuilt 1995
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
35 ft
1 main span
Daily traffic
48,987
2022 count
Owner
State
State Highway Agency

About this bridge

Nj 10 over Mill Brook is a steel stringer/multi-beam or girder carrying Nj 10 over Mill Brook in Morris County, New Jersey. It was built in 1932 and reconstructed in 1995, so it is 93 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 48,987 vehicles a day, roughly 4% of them trucks, projected to reach 58,785 by 2042. The structure is 35 ft (10.7 m) long and 120 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNj 10
CrossesMill Brook
Location3.5 MI West of Rt 53
RouteState Highway 10
CountyMorris County
StateNew Jersey
Coordinates40.87333, -74.53333
Functional classUrban Other Principal 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 inspectionMarch 2024
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 rating61 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length35 ft (10.7 m)
Longest span30 ft (9.1 m)
Deck width120 ft (36.6 m)
Roadway width83 ft (25.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48,987 (2022)
Projected traffic58,785 by 2042
Trucks4%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$302,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nj 10 over Mill Brook built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1995.

What condition is Nj 10 over Mill 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 2024.

How much traffic does Nj 10 over Mill Brook carry?

About 48,987 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Nj 10 over Mill Brook?

The structure is 35 ft (10.7 m) long with a longest span of 30 ft (9.1 m) and a deck 120 ft wide.

Who owns Nj 10 over Mill Brook?

It is owned by the State Highway Agency.