US Bridges

Lake RD over Whippany River

Good

Morris County, New Jersey · 0.8MI NW CR617&US202 JCT · Structure no. 1400801

Built
1997
28 years old
Condition
Good
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
67 ft
1 main span
Daily traffic
2,762
2023 count
Owner
County
County Highway Agency

About this bridge

Lake RD over Whippany River is a prestressed concrete box beam or girders - multiple carrying Lake RD over Whippany River in Morris County, New Jersey. It was built in 1997, so it is 28 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 2,762 vehicles a day, roughly 3% of them trucks, projected to reach 3,369 by 2043. The structure is 67 ft (20.4 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesLake RD
CrossesWhippany River
Location0.8MI NW CR617&US202 JCT
RouteCity Street 0
Coordinates40.81373, -74.48987
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 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 evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating89.9 US tons
Inventory rating54 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length67 ft (20.4 m)
Longest span62 ft (18.9 m)
Deck width37 ft (11.2 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,762 (2023)
Projected traffic3,369 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$140,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Lake RD over Whippany River built?

It was built in 1997, making it 28 years old in 2025.

What condition is Lake RD over Whippany River 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 Lake RD over Whippany River carry?

About 2,762 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Lake RD over Whippany River?

The structure is 67 ft (20.4 m) long with a longest span of 62 ft (18.9 m) and a deck 37 ft wide.

Who owns Lake RD over Whippany River?

It is owned by the County Highway Agency.