US Bridges

Mccan Mill Road over Hollow Brook

Fair

Hunterdon County, New Jersey · 0.1 MI South Rt 512 · Structure no. 1000063

Built
1930
95 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
33 ft
1 main span
Daily traffic
1,741
2023 count
Owner
County
County Highway Agency

About this bridge

Mccan Mill Road over Hollow Brook is a steel stringer/multi-beam or girder carrying Mccan Mill Road over Hollow Brook in Hunterdon County, New Jersey. It was built in 1930, so it is 95 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 1,741 vehicles a day, roughly 3% of them trucks, projected to reach 2,124 by 2043. The structure is 33 ft (10.1 m) long and 18 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesMccan Mill Road
CrossesHollow Brook
Location0.1 MI South Rt 512
RouteCity Street 0
CountyHunterdon County
StateNew Jersey
Coordinates40.71419, -74.72209
Functional classRural 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
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.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length33 ft (10.1 m)
Longest span28 ft (8.5 m)
Deck width18 ft (5.4 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,741 (2023)
Projected traffic2,124 by 2043
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$243,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mccan Mill Road over Hollow Brook built?

It was built in 1930, making it 95 years old in 2025.

What condition is Mccan Mill Road over Hollow 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 March 2023.

How much traffic does Mccan Mill Road over Hollow Brook carry?

About 1,741 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Mccan Mill Road over Hollow Brook?

The structure is 33 ft (10.1 m) long with a longest span of 28 ft (8.5 m) and a deck 18 ft wide.

Who owns Mccan Mill Road over Hollow Brook?

It is owned by the County Highway Agency.