US Bridges

Milltown Road over Lockatong Creek

PoorPosted for load

Hunterdon County, New Jersey · 0.7 Mile West of CR 519 · Structure no. 100K087

Built
1850
175 years old, rebuilt 1929
Condition
Poor
inspected May 2023
Type
Truss - Thru
Steel
Length
54 ft
1 main span
Daily traffic
95
2023 count
Owner
County
County Highway Agency

About this bridge

Milltown Road over Lockatong Creek is a steel truss - thru carrying Milltown Road over Lockatong Creek in Hunterdon County, New Jersey. It was built in 1850 and reconstructed in 1929, so it is 175 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 95 vehicles a day, projected to reach 115 by 2043. The structure is 54 ft (16.5 m) long and 15 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesMilltown Road
CrossesLockatong Creek
Location0.7 Mile West of CR 519
CountyHunterdon County
StateNew Jersey
Coordinates40.45315, -75.02449
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, 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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating33 US tons
Inventory rating19 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length54 ft (16.5 m)
Longest span52 ft (15.8 m)
Deck width15 ft (4.5 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic95 (2023)
Projected traffic115 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.2 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Milltown Road over Lockatong Creek built?

It was built in 1850, making it 175 years old in 2025. It was reconstructed in 1929.

What condition is Milltown Road over Lockatong Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2023.

How much traffic does Milltown Road over Lockatong Creek carry?

About 95 vehicles per day (2023 count).

How long is Milltown Road over Lockatong Creek?

The structure is 54 ft (16.5 m) long with a longest span of 52 ft (15.8 m) and a deck 15 ft wide.

Who owns Milltown Road over Lockatong Creek?

It is owned by the County Highway Agency.