Mercer County Bridge Report Card

Mercer County scores 44 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

F44 / 100

Local infrastructure snapshot

Mercer County, Pennsylvania

Mercer County has 437 bridges in the National Bridge Inventory, with 65 rated poor and 41 rated scour-critical. Its poor-condition share of 14.9% is above the 12.1% statewide average. Poor-condition bridges carry about 83,812 daily vehicle crossings.

437Total Bridges

65Poor (14.9%)

193Fair (44.2%)

41Scour-Critical

Quote-Ready Local Facts

14.9%of county bridges are in poor condition, compared with 12.1% statewide and 6.7% nationally.

83,812daily vehicle crossings are on poor-condition bridges in the county.

41bridges are rated scour-critical, or 9.4% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Mercer County a Bridge Condition Exposure Score of 44/100 (F). The county has 437 bridges in the National Bridge Inventory, including 65 in poor condition and 41 rated scour-critical. Poor-condition bridges carry about 83,812 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.

Download all county report-card scores as CSV.

How the Score Breaks Down

Factor	Weight	County Value	Penalty
Poor-condition bridge share	40	14.9%	29.7
Poor-condition traffic exposure	25	6.6% of measured traffic	4.9
Scour-critical bridge share	20	9.4%	18.8
Average age vs national baseline	10	53 years vs 48 nationally	2.2
Traffic-data completeness	5	1,272,828 measured daily crossings	0.0

Score = 100 minus weighted penalties. The score is a comparative research signal, not an official safety rating. Read the full methodology.

County Comparisons

County Poor-Condition Share	14.9%
State Poor-Condition Share	12.1%
National Poor-Condition Share	6.7%
County Scour-Critical Share	9.4%
Average Bridge Age	53 years
Poor-Condition Traffic Exposure	83,812 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeSR 58 Main Street over Over Wolf Creek — 10,535 vehicles/day Oldest Listed BridgeMill Road over Little Shenango River — built in 1885 All County BridgesBrowse every bridge record in Mercer County.

Top Bridges to Watch in Mercer County

Bridge	Reason	Condition	Daily Traffic	Year Built
Lincoln AVE over Wolf Creek	Poor condition + traffic exposure	Poor	3,473	1981
Service AVE over Pine Run	Poor condition + traffic exposure	Poor	1,637	1951
Prindle Street over Pine Run	Poor condition + traffic exposure	Poor	1,437	1935
SR 2013 E Home ST over Munnell Run	Poor condition + traffic exposure	Poor	951	1910
SR 846 Orngvlle.rd over Over Big Run Trib	Poor condition + traffic exposure	Poor	741	1910
SR 2017 N.foster R over Over Cool Spring Creek	Poor condition + traffic exposure	Poor	552	1952
SR 2014 Scrubgrass over E Br Wolf Creek Trib.	Poor condition + traffic exposure	Poor	472	1939
Wengler AVE over Pine Hollow Run	Poor condition + traffic exposure	Poor	268	1929
SR 3022 Rutledge R over Booth Run	Poor condition + traffic exposure	Poor	262	1941
Robertson Road over Golden Run	Poor condition + traffic exposure	Poor	253	1956

Important safety note

Poor condition does not mean a bridge is unsafe. It means at least one major component has significant deterioration and the bridge is a priority for maintenance, repair, or replacement. Bridges judged unsafe are closed or restricted by transportation agencies.