US Bridges

Shamrock Way over Robinson Brook

Fair

Middlesex County, New Jersey · 200 Feet South of CR602 · Structure no. 122B511

Built
1990
35 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
28 ft
2 main spans
Daily traffic
4,366
2023 count
Owner
County
County Highway Agency

About this bridge

Shamrock Way over Robinson Brook is a concrete culvert carrying Shamrock Way over Robinson Brook in Middlesex County, New Jersey. It was built in 1990, so it is 35 years old, younger 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 4,366 vehicles a day, roughly 1% of them trucks, projected to reach 5,327 by 2043. The structure is 28 ft (8.5 m) long and 49 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesShamrock Way
CrossesRobinson Brook
Location200 Feet South of CR602
RouteCity Street 0
CountyMiddlesex County
StateNew Jersey
Coordinates40.59601, -74.36515
Functional classUrban 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span12 ft (3.7 m)
Deck width49 ft (15 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,366 (2023)
Projected traffic5,327 by 2043
Trucks1%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Shamrock Way over Robinson Brook built?

It was built in 1990, making it 35 years old in 2025.

What condition is Shamrock Way over Robinson 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 March 2023.

How much traffic does Shamrock Way over Robinson Brook carry?

About 4,366 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Shamrock Way over Robinson Brook?

The structure is 28 ft (8.5 m) long with a longest span of 12 ft (3.7 m) and a deck 49 ft wide.

Who owns Shamrock Way over Robinson Brook?

It is owned by the County Highway Agency.