Bridge conditions in Lehigh County, Pennsylvania

378 inventoried bridges · 41 rated poor · 2025 National Bridge Inventory

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

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 August 20, 2026.
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.

Every bridge in Lehigh County → - all 378, busiest first, each with its own condition record.

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.