US Bridges

S.Randolphville RD over Ambrose Brook

Fair

Middlesex County, New Jersey · 0.5 Mi. N. of Metlars LA · Structure no. 122B129

Built
1938
87 years old, rebuilt 2002
Condition
Fair
inspected May 2023
Type
Arch - Deck
Steel
Length
35 ft
2 main spans
Daily traffic
26,546
2023 count
Owner
County
County Highway Agency

About this bridge

S.Randolphville RD over Ambrose Brook is a steel arch - deck carrying S.Randolphville RD over Ambrose Brook in Middlesex County, New Jersey. It was built in 1938 and reconstructed in 2002, so it is 87 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 26,546 vehicles a day, roughly 3% of them trucks, projected to reach 32,391 by 2043. The structure is 35 ft (10.7 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesS.Randolphville RD
CrossesAmbrose Brook
Location0.5 Mi. N. of Metlars LA
RouteCity Street 0
CountyMiddlesex County
StateNew Jersey
Coordinates40.53947, -74.45297
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating50 US tons
Inventory rating37 US tons

Structure

Structure typeArch - Deck
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length35 ft (10.7 m)
Longest span16 ft (4.9 m)
Deck width31 ft (9.4 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,546 (2023)
Projected traffic32,391 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 statusEligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S.Randolphville RD over Ambrose Brook built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 2002.

What condition is S.Randolphville RD over Ambrose 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 S.Randolphville RD over Ambrose Brook carry?

About 26,546 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is S.Randolphville RD over Ambrose Brook?

The structure is 35 ft (10.7 m) long with a longest span of 16 ft (4.9 m) and a deck 31 ft wide.

Who owns S.Randolphville RD over Ambrose Brook?

It is owned by the County Highway Agency.