US Bridges

Mill Street over Dry Brook

Fair

Sussex County, New Jersey · 0.1 MI E of CR 519 · Structure no. 1900B04

Built
1939
86 years old, rebuilt 1990
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
34 ft
1 main span
Daily traffic
709
2023 count
Owner
County
County Highway Agency

About this bridge

Mill Street over Dry Brook is a steel stringer/multi-beam or girder carrying Mill Street over Dry Brook in Sussex County, New Jersey. It was built in 1939 and reconstructed in 1990, so it is 86 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 709 vehicles a day, roughly 3% of them trucks, projected to reach 865 by 2043. The structure is 34 ft (10.4 m) long and 19 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMill Street
CrossesDry Brook
Location0.1 MI E of CR 519
RouteCity Street 0
CountySussex County
StateNew Jersey
Coordinates41.14363, -74.74534
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckOpen grating
Main spans1
Design loadUnknown
Structure length34 ft (10.4 m)
Longest span30 ft (9.1 m)
Deck width19 ft (5.9 m)
Roadway width19 ft (5.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic709 (2023)
Projected traffic865 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$321,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mill Street over Dry Brook built?

It was built in 1939, making it 86 years old in 2025. It was reconstructed in 1990.

What condition is Mill Street over Dry 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 February 2023.

How much traffic does Mill Street over Dry Brook carry?

About 709 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Mill Street over Dry Brook?

The structure is 34 ft (10.4 m) long with a longest span of 30 ft (9.1 m) and a deck 19 ft wide.

Who owns Mill Street over Dry Brook?

It is owned by the County Highway Agency.