US Bridges

Birdsall Road over Mingamahone Brook

Fair

Monmouth County, New Jersey · 0.2 MI East of CR 547 · Structure no. 130HL42

Built
1947
78 years old, rebuilt 1989
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
33 ft
2 main spans
Daily traffic
2,522
2023 count
Owner
County
County Highway Agency

About this bridge

Birdsall Road over Mingamahone Brook is a concrete continuous slab carrying Birdsall Road over Mingamahone Brook in Monmouth County, New Jersey. It was built in 1947 and reconstructed in 1989, so it is 78 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.

It carries about 2,522 vehicles a day, roughly 3% of them trucks, projected to reach 3,026 by 2043. The structure is 33 ft (10.1 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesBirdsall Road
CrossesMingamahone Brook
Location0.2 MI East of CR 547
CountyMonmouth County
StateNew Jersey
Coordinates40.18786, -74.15793
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no 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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating69 US tons
Inventory rating41 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length33 ft (10.1 m)
Longest span15 ft (4.6 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,522 (2023)
Projected traffic3,026 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$547,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Birdsall Road over Mingamahone Brook built?

It was built in 1947, making it 78 years old in 2025. It was reconstructed in 1989.

What condition is Birdsall Road over Mingamahone 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 May 2023.

How much traffic does Birdsall Road over Mingamahone Brook carry?

About 2,522 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Birdsall Road over Mingamahone Brook?

The structure is 33 ft (10.1 m) long with a longest span of 15 ft (4.6 m) and a deck 24 ft wide.

Who owns Birdsall Road over Mingamahone Brook?

It is owned by the County Highway Agency.