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US Rt 9 over Deep Run Brook

Middlesex County, New Jersey · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

US Rt 9 over Deep Run Brook in Middlesex County, New Jersey, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1940 and reconstructed in 1973, making it 85 years old at the 2025 inventory.
It carries about 86,421 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 409 of the 563 inventoried bridges in Middlesex County rated fair (72.6%); 24 (4.3%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Steel stringer or multi-beam girder
Length	about 35 ft
Location	1.13 Miles No. of Rt. 18
NBI structure number	1206151
Condition class	Fair

Source: FHWA National Bridge Inventory, 2025 data as reported by the New Jersey department of transportation.

Bridge	Built	Vehicles/day	Condition
Tpknso/nsi/sni/sno over Colonial Pipelines	1947	196,710	Good
Garden St Parkway over S Br Rahway River	1948	194,231	Fair
Washington Ave over I-287	1962	190,050	Fair
Nj Turnpike(i-95) over Mill Brook	1950	175,389	Fair
Nj Turnpike(i-95) over Mill Brook	1950	175,376	Fair
Nj Turnpike(i-95) over Mill Brook	1950	175,376	Fair