US Bridges

Maple Lake Road over Nj 23

Fair

Morris County, New Jersey · 3.75 M N of I-287 on NJ23 · Structure no. 1405154

Built
1934
91 years old, rebuilt 1997
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
120 ft
1 main span
Daily traffic
2,000
2023 count
Owner
State
State Highway Agency

About this bridge

Maple Lake Road over Nj 23 is a steel stringer/multi-beam or girder carrying Maple Lake Road over Nj 23 in Morris County, New Jersey. It was built in 1934 and reconstructed in 1997, so it is 91 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 2,000 vehicles a day, roughly 1% of them trucks, projected to reach 2,400 by 2043. The structure is 120 ft (36.6 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesMaple Lake Road
CrossesNj 23
Location3.75 M N of I-287 on NJ23
RouteCity Street 0
Coordinates41.0095, -74.36333
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating80 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length120 ft (36.6 m)
Longest span114 ft (34.7 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2023)
Projected traffic2,400 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Maple Lake Road over Nj 23 built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1997.

What condition is Maple Lake Road over Nj 23 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 March 2023.

How much traffic does Maple Lake Road over Nj 23 carry?

About 2,000 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Maple Lake Road over Nj 23?

The structure is 120 ft (36.6 m) long with a longest span of 114 ft (34.7 m) and a deck 31 ft wide.

Who owns Maple Lake Road over Nj 23?

It is owned by the State Highway Agency.