US Bridges

Mill Street over Quequacommisacong Creek

FairPosted for load

Hunterdon County, New Jersey · 0.1 MI NE of CR 519 · Structure no. 100M112

Built
1900
125 years old, rebuilt 2007
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
45 ft
1 main span
Daily traffic
424
2023 count
Owner
County
County Highway Agency

About this bridge

Mill Street over Quequacommisacong Creek is a steel stringer/multi-beam or girder carrying Mill Street over Quequacommisacong Creek in Hunterdon County, New Jersey. It was built in 1900 and reconstructed in 2007, so it is 125 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. Its operating status is: posted for load restriction.

It carries about 424 vehicles a day, projected to reach 509 by 2043. The structure is 45 ft (13.7 m) long and 15 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMill Street
CrossesQuequacommisacong Creek
Location0.1 MI NE of CR 519
Coordinates40.57252, -75.09527
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54 US tons
Inventory rating32 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length45 ft (13.7 m)
Longest span45 ft (13.7 m)
Deck width15 ft (4.5 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic424 (2023)
Projected traffic509 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$415,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mill Street over Quequacommisacong Creek built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 2007.

What condition is Mill Street over Quequacommisacong Creek 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 June 2023.

How much traffic does Mill Street over Quequacommisacong Creek carry?

About 424 vehicles per day (2023 count).

How long is Mill Street over Quequacommisacong Creek?

The structure is 45 ft (13.7 m) long with a longest span of 45 ft (13.7 m) and a deck 15 ft wide.

Who owns Mill Street over Quequacommisacong Creek?

It is owned by the County Highway Agency.