US Bridges

Main ST CR 511 over Montclair-Boonton Line

Fair

Morris County, New Jersey · 340FT N CR511 & I287 JCT · Structure no. 1463151

Built
1927
98 years old
Condition
Fair
inspected January 2023
Type
Girder and Floorbeam System
Steel
Length
71 ft
1 main span
Daily traffic
8,995
2023 count
Owner
Unknown
Unknown

About this bridge

Main ST CR 511 over Montclair-Boonton Line is a steel girder and floorbeam system carrying Main ST CR 511 over Montclair-Boonton Line in Morris County, New Jersey. It was built in 1927, so it is 98 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 5 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 8,995 vehicles a day, roughly 4% of them trucks, projected to reach 12,120 by 2043. The structure is 71 ft (21.6 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMain ST CR 511
CrossesMontclair-Boonton Line
Location340FT N CR511 & I287 JCT
RouteCounty Highway 511
CountyMorris County
StateNew Jersey
Coordinates40.90326, -74.40796
Functional classUrban Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating55 US tons
Inventory rating33 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length71 ft (21.6 m)
Longest span65 ft (19.8 m)
Deck width35 ft (10.8 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,995 (2023)
Projected traffic12,120 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerUnknown
Maintained byOther State Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$10.8 million (2023 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Main ST CR 511 over Montclair-Boonton Line built?

It was built in 1927, making it 98 years old in 2025.

What condition is Main ST CR 511 over Montclair-Boonton Line 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 January 2023.

How much traffic does Main ST CR 511 over Montclair-Boonton Line carry?

About 8,995 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Main ST CR 511 over Montclair-Boonton Line?

The structure is 71 ft (21.6 m) long with a longest span of 65 ft (19.8 m) and a deck 35 ft wide.

Who owns Main ST CR 511 over Montclair-Boonton Line?

It is owned by the Unknown and maintained by the Other State Agency.