Bridge conditions in Northumberland County, Pennsylvania
298 inventoried bridges · 20 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 298 bridges in Northumberland County: 127 rated good, 151 fair, and 20 poor.
- 20 of the 298 bridges in Northumberland County, Pennsylvania, are rated in poor condition (6.7%) in the 2025 National Bridge Inventory, as of .
- 127 bridges (42.6%) are rated good and 151 (50.7%) fair.
- The median Northumberland County bridge was built in 1969.
- The busiest poor-rated bridge is W Walnut St over Shamokin Creek (built 1914), carrying about 8,400 vehicles a day.
Good 42.6% · Fair 50.7% · Poor 6.7% of 298 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 |
|---|---|---|---|
| W Walnut St over Shamokin Creek | 1914 | 8,400 | Poor |
| SR 890 over Little Shamokin Creek | 1949 | 2,336 | Poor |
| Warrior Run Blvd. over Warrior Run | 1920 | 1,200 | Poor |
| Willow Street over Shamokin Creek | 1906 | 600 | Poor |
| T-506 (8th Street) over Zerbe Run | 1904 | 400 | Poor |
| SR 2010 over over Shamokin Creek | 1937 | 311 | Poor |
| Rockefeller T-538 over Little Shamokin Creek | 1985 | 200 | Poor |
| T-630 (river Road) over Delaware Run | 1973 | 150 | Poor |
| T-805 (Jepko Road) over S Branch of Roaring CR | 1852 | 150 | Poor |
| T-364 Turbot Twp. over over Muddy Run | 1949 | 150 | Poor |
| T-594 over Chillisquaque Creek | 1881 | 100 | Poor |
| T-392 over Boile Run | 1951 | 100 | Poor |
| T-764 Tulip Road over Trib. Shamokin Creek | 1930 | 100 | Poor |
| T-684 Rockefeller over Trib.to Plum Creek | 1920 | 75 | Poor |
| S.R 3005 over Schwaben Creek | 1948 | 65 | Poor |
| T-766 Poppy Road over (s-c)shamokin Valley RR | 1903 | 50 | Poor |
| T-393 over Hallowing Run | 1904 | 25 | Poor |
| Hollow Road over Schwaben Creek | 1897 | 25 | Poor |
| T-672 over Glade Run | 1904 | – | Poor |
| T-480 over Mahanoy Creek | 1910 | – | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR 61 over Susquehanna River | 1986 | 20,080 | Good |
| SR 61 over over Shamokin CR. | 1926 | 17,574 | Fair |
| I-80 WB over SR405& WB Susquehanna R. | 1962 | 16,130 | Fair |
| SR 80 Wbl over Norfolk Southern RR | 2001 | 16,130 | Good |
| I-80 EB over SR405 & W Br Susquehanna | 1962 | 16,007 | Fair |
| SR 80 Ebl over Norfolk Southern RR | 2002 | 16,007 | Good |
| SR 147 over Susquehanna River | 2019 | 14,615 | Good |
| SR 61 over over Bennys Run | 1947 | 14,116 | Fair |
| SR I-80 Ebl over over SR254 & Limestone C | 1962 | 14,014 | Fair |
| I-80 WB over over SR 1019 & Muddy Run | 1962 | 13,905 | 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.