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Bridge conditions in Mercer County, Pennsylvania
437 inventoried bridges · 65 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
About one in 7 bridges in Mercer County is rated in poor condition: 65 of 437 on the federal inventory, one of the higher shares in Pennsylvania.
- 65 of the 437 bridges in Mercer County, Pennsylvania, are rated in poor condition (14.9%) in the 2025 National Bridge Inventory, as of .
- 179 bridges (41.0%) are rated good and 193 (44.2%) fair.
- The median Mercer County bridge was built in 1967.
- The busiest poor-rated bridge is SR 58 Main Street over over Wolf Creek (built 1967), carrying about 10,535 vehicles a day.
Good 41.0% · Fair 44.2% · Poor 14.9% of 437 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 58 Main Street over over Wolf Creek | 1967 | 10,535 | Poor |
| SR 60 Nb/sb Beaver over over SR 18 S Hermitage | 1966 | 7,590 | Poor |
| SR 18 New Castle R over over Hog Back Run | 1941 | 7,414 | Poor |
| SR 60 Dock St over over Old Canal Creek | 1923 | 7,198 | Poor |
| Silver Street over Shenango River | 1983 | 5,513 | Poor |
| SR 62 Franklin Rd. over over Spring Creek | 1948 | 3,889 | Poor |
| SR 173 Grove City over over Wolf Creek Trib | 1930 | 3,657 | Poor |
| SR 173 Grove City over Black Run | 1923 | 3,657 | Poor |
| Lincoln Ave over Wolf Creek | 1981 | 3,473 | Poor |
| Ohl Street over Shenango River | 1909 | 3,024 | Poor |
| SR 19 Perry Hwy. over over Johnston Run | 1928 | 2,788 | Poor |
| SR 358 Hadley Road over over SR 79 Nb/sb | 1969 | 2,346 | Poor |
| SR 19 Perry Hwy. over over Shenango River Trib | 1942 | 2,013 | Poor |
| S. Orangeville Rd over Pymatuning | 1965 | 1,987 | Poor |
| SR 846 Saranac Rd. over over Shenango Reservoir | 1964 | 1,985 | Poor |
| Service Ave over Pine Run | 1951 | 1,637 | Poor |
| Prindle Street over Pine Run | 1935 | 1,437 | Poor |
| SR 4019 Methodist over over Little Shenango R | 1933 | 1,054 | Poor |
| SR 2014 Scrubgrass over Cool Spring | 1954 | 985 | Poor |
| SR 2013 E Home St over Munnell Run | 1910 | 951 | Poor |
| SR 846 Orngvlle.rd over over Big Run Trib | 1910 | 741 | Poor |
| SR 2006 Blacktown over over SR 79 Nb/sb | 1963 | 663 | Poor |
| Daugherty Road over Black Run | 1983 | 592 | Poor |
| SR 4021 Atlantic over Bluff Run | 1952 | 567 | Poor |
| Orangeville Rd over Big Run | 1964 | 554 | Poor |
| SR 2017 N.foster R over over Cool Spring Creek | 1952 | 552 | Poor |
| East Gilmore Road over Wolf Creek East Branch | 1959 | 538 | Poor |
| Bend Road over W Br Little Neshannock | 1956 | 488 | Poor |
| SR 2014 Scrubgrass over E Br Wolf Creek Trib. | 1939 | 472 | Poor |
| East Gilmore Road over Wolf Creek | 1959 | 454 | Poor |
| Daugherty Road over Wolf Creek | 1953 | 410 | Poor |
| Old Mercer Road over Neshannock Creek | 1922 | 402 | Poor |
| Hosack Road over Yellow Creek | 1965 | 375 | Poor |
| Marstellar Road over Otter Creek | 1960 | 277 | Poor |
| Wengler Ave over Pine Hollow Run | 1929 | 268 | Poor |
| Lacock Street over Sandy Creek | 1971 | 263 | Poor |
| SR 3022 Rutledge R over Booth Run | 1941 | 262 | Poor |
| SR 2104 Fox Mine R over over SR 79 Nb/sb | 1965 | 255 | Poor |
| Robertson Road over Golden Run | 1956 | 253 | Poor |
| McKinley Ave over Munnell Run | 1976 | 250 | Poor |
| Hosack Road over Yellow Creek Branch | 1965 | 241 | Poor |
| Wozniak Road over Harthegig Run | 1963 | 220 | Poor |
| Triple Link Road over Butchery Run | 1958 | 157 | Poor |
| Hassel Road over Magargee Run | 1975 | 152 | Poor |
| Wise Road over Big Run | 1968 | 139 | Poor |
| Scott Road over Shenango River Tributary | 1957 | 135 | Poor |
| CN Railroad (B&LE) over Orr Road | 1928 | 124 | Poor |
| North Spring Road over Mill Run | 1922 | 98 | Poor |
| Heasley Road over Shenango River Tributary | 1922 | 89 | Poor |
| Carpenter Road over Little Shenango | 1961 | 87 | Poor |
| Larimer Road over Sandy Creek | 1963 | 82 | Poor |
| Murphy Road over Branch of Shenango | 1963 | 78 | Poor |
| Hosack Road over Yellow Creek | 1965 | 76 | Poor |
| Runkle Lane over Cool Springs Creek | 1954 | 61 | Poor |
| Mill Road over Little Shenango River | 1885 | 57 | Poor |
| Crouser School Rd over Mill Creek | 1908 | 43 | Poor |
| Williamson Road over Little Shenango Branch | 1934 | 32 | Poor |
| Yeager Road over Pine Run | 1961 | 31 | Poor |
| Bishop Road over Sandy Creek | 1985 | 31 | Poor |
| Huron Street over Chestnut Run | 1897 | 28 | Poor |
| Scofield Road over Sandy Creek | 1969 | 27 | Poor |
| Hutchison Road over Little Shenango Branch | 1965 | 24 | Poor |
| Crystal Spring over Little Sandy Creek | 1965 | 21 | Poor |
| Creek Road over North Deer Creek | 1987 | 10 | Poor |
| Calvin Road over Bluff Run | 1900 | – | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR 80 Eb/wb & Ramp over Hogback Run | 1966 | 26,925 | Good |
| SR 79 Nb/sb over over Pine Run | 1963 | 21,958 | Fair |
| SR 80 EB over over SR 718 Sieg Hill Rd | 1964 | 13,718 | Fair |
| SR 80 EB over over Abandon RR &shngo R | 1966 | 13,718 | Fair |
| SR 80 EB over over SR 18 New Castle Rd | 1993 | 13,718 | Good |
| SR 60 Nb/sb Beaver over over Hogback Run | 1966 | 13,476 | Fair |
| SR 80 WB over over SR 718 Sieg Hill Rd | 1964 | 13,426 | Fair |
| SR 80 WB over over Abandon RR &shngo R | 1966 | 13,426 | Fair |
| SR 80 WB over over SR 18 New Castle Rd | 1994 | 13,426 | Good |
| SR 80 WB over over SR 19 Nb/sb Perry | 1965 | 13,129 | 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.