Bridge conditions in Carbon County, Pennsylvania
134 inventoried bridges · 23 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
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 .
- 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.
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.