Bridge conditions in Lehigh County, Pennsylvania
378 inventoried bridges · 41 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Of the 378 Lehigh County bridges in the federal inventory, 41 carry a poor rating. That 10.8% share is roughly 2x the national average.
- 41 of the 378 bridges in Lehigh County, Pennsylvania, are rated in poor condition (10.8%) in the 2025 National Bridge Inventory, as of .
- 113 bridges (29.9%) are rated good and 224 (59.3%) fair.
- The median Lehigh County bridge was built in 1961.
- The busiest poor-rated bridge is Ramp Ab over Pa Tpk (I-476) (built 1956), carrying about 21,503 vehicles a day.
Good 29.9% · Fair 59.3% · Poor 10.8% of 378 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 |
|---|---|---|---|
| Ramp Ab over Pa Tpk (I-476) | 1956 | 21,503 | Poor |
| SR1011 (8TH Ave) over Norfolk Southern RR | 1967 | 18,578 | Poor |
| Basin Street over Little Lehigh Creek | 1959 | 14,700 | Poor |
| SR 329(LR 175) over Lehigh River | 1933 | 13,934 | Poor |
| Hamilton Street over Jordan Creek & Rjcn | 1973 | 13,600 | Poor |
| SR 2017(lr39025) over Little Lehigh Creek | 1957 | 9,297 | Poor |
| Pine Street over Lehigh R. NS RR Water St | 1953 | 8,000 | Poor |
| SR 2010 (lr 39109) over Little Lehigh Creek | 1939 | 7,302 | Poor |
| SR 2029(LR 39002) over Trib. Saucon Creek | 1953 | 6,993 | Poor |
| SR 3017 over Schaefer Run | 2005 | 5,837 | Poor |
| 4TH Street over Jordan Ck & Sumner Ave. | 1959 | 5,000 | Poor |
| S.walnut Street over Trout Creek & Factory St | 1925 | 3,000 | Poor |
| SR 2029(lr.39002) over Hosensack Creek | 1933 | 2,882 | Poor |
| SR 4040 (lr 39072) over Switzer Creek | 1930 | 1,641 | Poor |
| SR 2018(LR 39026) over Branch of Swabia Creek | 1929 | 1,400 | Poor |
| SR 4004(LR 39071) over Hassen Creek | 1964 | 1,207 | Poor |
| Lehigh Parkway E. over Little Lehigh Creek | 1828 | 1,000 | Poor |
| Walnut Street over Cedar Creek | 1824 | 1,000 | Poor |
| SR 2029(LR 39002) over Indian Creek | 1935 | 999 | Poor |
| Macungie Road over Little Lehigh Creek | 1950 | 750 | Poor |
| SR 4009 (lr 39057) over Mill Creek | 1912 | 727 | Poor |
| SR 4019 (lr 39063) over Sweitzer Creek | 1937 | 631 | Poor |
| SR 2025(LR 39005) over Indian Creek | 1933 | 529 | Poor |
| Devonshire Road over Little Lehigh Creek | 1870 | 500 | Poor |
| Wood Street over Catasauqua Creek | 1950 | 500 | Poor |
| Ash Lane over Toad Creek | 1966 | 400 | Poor |
| Quarry Street over Coplay Creek | 1920 | 300 | Poor |
| SR 4027 (lr 39060) over Jordan Creek | 1961 | 276 | Poor |
| Furnace Road over Trout Creek | 1935 | 210 | Poor |
| Allemaengel Rd. over Ontelaunee Creek | 1910 | 200 | Poor |
| Jordan Road over Jordan Creek | 1858 | 200 | Poor |
| South Albert St. over Lehigh Canal | 1940 | 200 | Poor |
| Jordan Road over Jordan Creek | 1959 | 190 | Poor |
| Springhouse Road over Ontelaunee Creek | 1834 | 100 | Poor |
| Township Line Road over Haasen Creek | 1977 | 100 | Poor |
| Center St. over Trout Creek | 1961 | 100 | Poor |
| Furnace Rd over Trout Creek | 1978 | 100 | Poor |
| Toll Gate Road over Indian Creek | 1919 | 70 | Poor |
| Smith Lane over Little Lehigh Creek | 1970 | 50 | Poor |
| Gun Club Road over Ontelaunee Creek | 1885 | 50 | Poor |
| County Bridge Road over Trout Creek | 1888 | 50 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-78(LR 1045) over Pa 100(LR 672) | 1958 | 126,705 | Fair |
| I 78(LR 1045) over Norfolk/southern RR | 1988 | 126,705 | Fair |
| I-78 (lr 1045) over SR 3009 (ruppsville Rd) | 1988 | 126,705 | Good |
| US 22(LR 771) over T-638(irving St.) | 1952 | 92,608 | Good |
| US 22 (lr 771) over Lehigh River | 2017 | 92,608 | Good |
| US 22 (lr 771) over Leh. Canal SR 1007 NSR | 2017 | 92,608 | Good |
| I-78 & Pa 309 over SR 2010 & Lt Lehigh CR | 1958 | 83,965 | Fair |
| I-78(LR 1045) over SR 2007 (lr 39016) | 1989 | 83,965 | Fair |
| I-78(LR 1045) over US 222(LR 157)HAMILTON | 1989 | 81,849 | Fair |
| I-78 & PA.309 over Pa 29&sr1019 Cedar Crest | 1989 | 80,843 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Pennsylvania: Pennsylvania 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.