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Bridge conditions in Hunterdon County, New Jersey

373 inventoried bridges · 26 rated poor · 2025 National Bridge Inventory

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

26 of the 373 bridges the federal inventory lists in Hunterdon County are rated poor; the rest split 75 good and 272 fair.

26 of the 373 bridges in Hunterdon County, New Jersey, are rated in poor condition (7.0%) in the 2025 National Bridge Inventory, as of August 20, 2026.
75 bridges (20.1%) are rated good and 272 (72.9%) fair.
The median Hunterdon County bridge was built in 1953.
The busiest poor-rated bridge is I-78 over Beaver Brook (built 1941), carrying about 130,244 vehicles a day.

Good 20.1% · Fair 72.9% · Poor 7.0% of 373 bridges

Bridges rated poor

Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.

Bridge	Built	Vehicles/day	Condition
I-78 over Beaver Brook	1941	130,244	Poor
US 22 over Njt Raritan Valley Line	1937	20,839	Poor
Bridge Street over D&r Feeder Canal	1920	11,856	Poor
County Route 619 over Harihokake Creek	1938	6,382	Poor
Mechlin Corner Rd over Norf. So. Lehigh Val ML	1968	5,247	Poor
Bridge Street over D&r Feeder Canal	1926	4,821	Poor
Nj 173 over Mulhockaway Creek	1919	4,272	Poor
CR 512 over Lamington River	1934	4,193	Poor
Cregar Road over Raritan Valley Line	1993	3,655	Poor
Sidney Rd (CR 617) over Lehigh Valley ML	1970	2,825	Poor
Rt Nj 29 over Copper Creek	1914	2,380	Poor
Woodsville Road over Peters Brook	1840	1,262	Poor
Changewater Road over Musconetcong River	1900	1,147	Poor
Lower Kingtown Rd over Capoolong Creek	1925	828	Poor
Thomas Street over High Brd Indus - Abnd	1937	638	Poor
Mountain Road over Raritan Valley Line	1910	520	Poor
Newport Road over Spruce Run	1900	486	Poor
Van Lieus Road over Back Brook	1910	459	Poor
Kuhls Road over Branch of Neshanic River	1936	414	Poor
Main Street over South Br Raritan River	1870	403	Poor
Palatine Road over Lamington River Trib.	1900	216	Poor
Mountain Road over Rockaway Creek	1901	169	Poor
Horseshoe Bend Rd over Copper Creek	1896	160	Poor
Pine Hill Road over South Br Raritan River	1900	159	Poor
Milltown Road over Lockatong Creek	1850	95	Poor
Hamp Road over Alexauken Creek	1900	67	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
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
I-78 EB over County Route 523	1965	107,826	Fair
I-78 EB over Leigh Street	1958	99,483	Fair
I-78 WB over Norfolk Southern	1959	98,397	Fair
I-78 E.B. over Turkey Hill Road	1960	98,386	Fair
I-78 EB over Norfolk Southern RR	1960	79,825	Fair

Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.

Every bridge in Hunterdon County → - all 373, busiest first, each with its own condition record.

All of New Jersey: New Jersey bridge conditions by county · every download on the data page.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.