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Mill Road over Rockaway Creek

Hunterdon County, New Jersey · rated Good in the 2025 National Bridge Inventory

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

Mill Road over Rockaway Creek in Hunterdon County, New Jersey, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 7 (good condition) on the 0-9 scale.
It was built in 1900 and reconstructed in 2023, making it 125 years old at the 2025 inventory.
It carries about 1,363 vehicles a day (traffic count year 2023).
Its listed owner is the county highway agency.
It is one of 75 of the 373 inventoried bridges in Hunterdon County rated good (20.1%); 26 (7.0%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings

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

Bridge	Built	Vehicles/day	Condition
I-78 EB over US 22 WB	1968	661,439	Fair
Rte I-78 & Ramp R over Beaver Brook	1948	130,244	Fair
I-78 over Beaver Brook	1941	130,244	Poor
I-78 over Branch Rockaway Creek	1966	129,446	Fair
I-78 EB over Beaver Brook	1958	109,955	Fair
I-78 over Tunnel Road	1960	108,465	Fair