US Bridges

Long Hill RD CR604 over Great Brook

Good

Morris County, New Jersey · 2.8MI SE of I-287 Exit 30 · Structure no. 1400547

Built
1993
32 years old
Condition
Good
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 Great Brook is a concrete culvert carrying Long Hill RD CR604 over Great 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 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 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
CrossesGreat Brook
Location2.8MI SE of I-287 Exit 30
RouteCounty Highway 604
CountyMorris County
StateNew Jersey
Coordinates40.71729, -74.48797
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating94 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 Great Brook built?

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

What condition is Long Hill RD CR604 over Great Brook 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 June 2023.

How much traffic does Long Hill RD CR604 over Great Brook carry?

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

How long is Long Hill RD CR604 over Great 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 Great Brook?

It is owned by the County Highway Agency.