Bridge conditions in Carbon County, Pennsylvania

134 inventoried bridges · 23 rated poor · 2025 National Bridge Inventory

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

About one in 6 bridges in Carbon County is rated in poor condition: 23 of 134 on the federal inventory, one of the higher shares in Pennsylvania.

23 of the 134 bridges in Carbon County, Pennsylvania, are rated in poor condition (17.2%) in the 2025 National Bridge Inventory, as of August 20, 2026.
28 bridges (20.9%) are rated good and 83 (61.9%) fair.
The median Carbon County bridge was built in 1962.
The busiest poor-rated bridge is Pa Tpk (I-476) over Mud Run (built 1957), carrying about 22,283 vehicles a day.

Good 20.9% · Fair 61.9% · Poor 17.2% of 134 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
Pa Tpk (I-476) over Mud Run	1957	22,283	Poor
SR 2002(appl.1461) over Little Aquashicola Creek	1922	10,968	Poor
I80 EB (LR1009) over Ramps G & H SR 8004	1965	9,892	Poor
SR 903(LR 550) over Mud Run	1932	5,877	Poor
Pa 93 over Quakake Creek	1927	4,225	Poor
Pa 534 (lr 13018) over Mud Run	1961	2,356	Poor
SR 2002 (lr 13013) over Borger Creek	1930	2,158	Poor
SR 2002 (lr 13013) over Hunters Creek	1930	1,906	Poor
SR 2004 (lr 13014) over Mill Creek	1960	1,825	Poor
SR 3012(LR 13033) over Mauch Chunk Creek	1930	1,034	Poor
Cover Bridge Rd over Princess Creek	1880	750	Poor
Pa 534(LR 13018) over Black Creek	1940	512	Poor
East Penn Street over Mahoning Creek	1971	500	Poor
SR 3005(LR 13032) over Mahoning Creek	1929	403	Poor
Stone Mountain Rd over Lizard Creek	1984	300	Poor
Lauchnor Rd over Lizard Creek	1984	300	Poor
Blue Mountain Rd over Lizard Creek	1992	300	Poor
SR 1005 & SR 2046 over Lehigh River	1930	213	Poor
T-333 Germans Rd over Lizard Creek	1991	200	Poor
County Ln Rd over Mahoning Creek	1910	150	Poor
Grist Mill Rd over Quakake Creek	1913	100	Poor
T-520(meckes Lane) over Black Creek	1890	50	Poor
Stoney Ck Rd over Stoney Creek	1910	–	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
Pa Tpk (I-476 SB) over Pohopoco Cr &LowerMainSt	2012	39,509	Good
Pa Tpk (I-476 NB) over Pohopoco Cr &LowerMainRd	2012	30,509	Good
US 209 (lr 163) over No/sout Rrs. Sts. Canal	1938	28,803	Fair
Pa Tpk (I-476) over T-337	1957	27,609	Fair
Pa Tpk (I-476) over Lizard Creek	1957	27,609	Fair
Pa 248 (lr 163) over SR 2002 (APPL.1461)	1962	25,764	Fair
Pa 248 (lr 163) over Norfolk Southern	1962	25,764	Fair
Pa 248(LR 163) over Aquashicola Creek	2000	25,764	Good
I-80 (lr 1009) over Black Creek	1965	25,539	Fair
Pa Tpk (I-476) over Sawmill Run	1956	24,228	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 Carbon County → - all 134, 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.