Bridge conditions in Mifflin County, Pennsylvania
196 inventoried bridges · 23 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Of the 196 Mifflin County bridges in the federal inventory, 23 carry a poor rating. That 11.7% share is roughly 2x the national average.
- 23 of the 196 bridges in Mifflin County, Pennsylvania, are rated in poor condition (11.7%) in the 2025 National Bridge Inventory, as of .
- 81 bridges (41.3%) are rated good and 92 (46.9%) fair.
- The median Mifflin County bridge was built in 1977.
- The busiest poor-rated bridge is SR 3006 over Jacks Creek (built 1965), carrying about 2,531 vehicles a day.
Good 41.3% · Fair 46.9% · Poor 11.7% of 196 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 |
|---|---|---|---|
| SR 3006 over Jacks Creek | 1965 | 2,531 | Poor |
| SR 3006 over SR 8005 | 1965 | 1,729 | Poor |
| SR 3006 over SR 8005 | 1965 | 1,729 | Poor |
| T-464 over Laurel Creek | 1920 | 1,000 | Poor |
| T-350 over Kishacoquillas Creek | 1962 | 841 | Poor |
| T-472 over Soft Run | 1975 | 671 | Poor |
| T-439 over Kishacoquillas Creek | 1920 | 628 | Poor |
| T-439 over Tea Creek | 1930 | 628 | Poor |
| T-737 Alfarata Rd over Jacks Creek | 1935 | 390 | Poor |
| T-315 over Jacks Creek | 1974 | 390 | Poor |
| SR 2008 over Branch Jacks Creek | 1963 | 389 | Poor |
| T-783 over Buck Run | 1960 | 378 | Poor |
| T-465 over Treaster Run | 1915 | 200 | Poor |
| T-383 Snook Road over Belltown Run | 1941 | 161 | Poor |
| Water Street over Town Run | 1922 | 132 | Poor |
| T-803 over Musser Run | 1922 | 127 | Poor |
| T-480 over Kishacoquillas Creek | 1973 | 100 | Poor |
| T-368 Spring Run over Kishacoquillas Creek | 1930 | 93 | Poor |
| T-458 Taylor Mill over Kishacoquillas Creek | 1900 | 80 | Poor |
| T-321 over Meadow Creek | 1915 | 75 | Poor |
| T-391 Ertley Road over Belltown Run | 1935 | 75 | Poor |
| Reeds Gap Road over Honey Creek | 1933 | 45 | Poor |
| T-420 over Kish. Creek | 1909 | – | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR 22-us 22 over Branch Kishacoquillas CR | 1958 | 36,350 | Fair |
| SR 322-us 322 over Buck Run | 1964 | 27,512 | Fair |
| SR 22-us 22 over Twp Rd 600 | 1958 | 14,029 | Fair |
| SR 22-us 22 over Valley Road | 1958 | 14,029 | Fair |
| SR 22-us 22 over Twp Rd 315 & Jacks Creek | 1958 | 14,029 | Fair |
| SR 22-us 22 over SR 522 Seda-cog | 1958 | 13,130 | Fair |
| SR 22-us 22 over SR 1005 Electric Avenue | 2001 | 13,130 | Good |
| on Freedom Avenue over Kishacoquillas Creek | 2019 | 12,439 | Good |
| SR 322-us 322 over Kish CR & Twp Rd 439 | 1964 | 11,712 | Fair |
| SR 322-us 322 over Kishacoquillas C/abnd RR | 1964 | 11,712 | 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.