US Bridges

Mountain Way over Watnong Brook

Fair

Morris County, New Jersey · 0.4MI W of US202&NJ53 JCT · Structure no. 1400807

Built
1988
37 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
33 ft
2 main spans
Daily traffic
2,421
2023 count
Owner
County
County Highway Agency

About this bridge

Mountain Way over Watnong Brook is a concrete culvert carrying Mountain Way over Watnong Brook in Morris County, New Jersey. It was built in 1988, so it is 37 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 2,421 vehicles a day, roughly 3% of them trucks, projected to reach 2,954 by 2043. The structure is 33 ft (10.1 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMountain Way
CrossesWatnong Brook
Location0.4MI W of US202&NJ53 JCT
RouteCity Street 0
CountyMorris County
StateNew Jersey
Coordinates40.8306, -74.48537
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97 US tons
Inventory rating58 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadUnknown
Structure length33 ft (10.1 m)
Longest span15 ft (4.6 m)
Deck width44 ft (13.5 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,421 (2023)
Projected traffic2,954 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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$43,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mountain Way over Watnong Brook built?

It was built in 1988, making it 37 years old in 2025.

What condition is Mountain Way over Watnong 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 July 2023.

How much traffic does Mountain Way over Watnong Brook carry?

About 2,421 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Mountain Way over Watnong Brook?

The structure is 33 ft (10.1 m) long with a longest span of 15 ft (4.6 m) and a deck 44 ft wide.

Who owns Mountain Way over Watnong Brook?

It is owned by the County Highway Agency.