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