US Bridges

Long Hill RD CR604 over Trib. of Black Brook

Fair

Morris County, New Jersey · 2.7 MI SE I-287 Exit 30 · Structure no. 1400546

Built
1993
32 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete
Length
20 ft
1 main span
Daily traffic
5,468
2023 count
Owner
County
County Highway Agency

About this bridge

Long Hill RD CR604 over Trib. of Black Brook is a concrete culvert carrying Long Hill RD CR604 over Trib. of Black Brook in Morris County, New Jersey. It was built in 1993, so it is 32 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 5,468 vehicles a day, roughly 3% of them trucks, projected to reach 6,671 by 2043. The structure is 20 ft (6.1 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesLong Hill RD CR604
CrossesTrib. of Black Brook
Location2.7 MI SE I-287 Exit 30
RouteCounty Highway 604
CountyMorris County
StateNew Jersey
Coordinates40.71851, -74.48897
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating95 US tons
Inventory rating56 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,468 (2023)
Projected traffic6,671 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Long Hill RD CR604 over Trib. of Black Brook built?

It was built in 1993, making it 32 years old in 2025.

What condition is Long Hill RD CR604 over Trib. of Black 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 June 2023.

How much traffic does Long Hill RD CR604 over Trib. of Black Brook carry?

About 5,468 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Long Hill RD CR604 over Trib. of Black Brook?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 28 ft wide.

Who owns Long Hill RD CR604 over Trib. of Black Brook?

It is owned by the County Highway Agency.