US Bridges

Hillside Road over Black River

Fair

Morris County, New Jersey · .5 Mile N. of Furnace RD · Structure no. 1401147

Built
1924
101 years old, rebuilt 1992
Condition
Fair
inspected July 2023
Type
Slab
Prestressed Concrete
Length
46 ft
1 main span
Daily traffic
1,825
2023 count
Owner
County
County Highway Agency

About this bridge

Hillside Road over Black River is a prestressed concrete slab carrying Hillside Road over Black River in Morris County, New Jersey. It was built in 1924 and reconstructed in 1992, so it is 101 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 1,825 vehicles a day, roughly 3% of them trucks, projected to reach 2,227 by 2043. The structure is 46 ft (14 m) long and 23 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHillside Road
CrossesBlack River
Location.5 Mile N. of Furnace RD
RouteCity Street 0
CountyMorris County
StateNew Jersey
Coordinates40.79956, -74.70419
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating96 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length46 ft (14 m)
Longest span41 ft (12.5 m)
Deck width23 ft (7 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,825 (2023)
Projected traffic2,227 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$289,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Hillside Road over Black River built?

It was built in 1924, making it 101 years old in 2025. It was reconstructed in 1992.

What condition is Hillside Road over Black 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 July 2023.

How much traffic does Hillside Road over Black River carry?

About 1,825 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Hillside Road over Black River?

The structure is 46 ft (14 m) long with a longest span of 41 ft (12.5 m) and a deck 23 ft wide.

Who owns Hillside Road over Black River?

It is owned by the County Highway Agency.