Carbon County Bridge Report Card

Carbon County scores 34 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

F34 / 100

Local infrastructure snapshot

Carbon County, Pennsylvania

Carbon County has 134 bridges in the National Bridge Inventory, with 23 rated poor and 16 rated scour-critical. Its poor-condition share of 17.2% is above the 12.1% statewide average. Poor-condition bridges carry about 66,302 daily vehicle crossings.

134Total Bridges

23Poor (17.2%)

83Fair (61.9%)

16Scour-Critical

Quote-Ready Local Facts

17.2%of county bridges are in poor condition, compared with 12.1% statewide and 6.7% nationally.

66,302daily vehicle crossings are on poor-condition bridges in the county.

16bridges are rated scour-critical, or 11.9% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Carbon County a Bridge Condition Exposure Score of 34/100 (F). The county has 134 bridges in the National Bridge Inventory, including 23 in poor condition and 16 rated scour-critical. Poor-condition bridges carry about 66,302 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	17.2%	34.3
Poor-condition traffic exposure	25	6.7% of measured traffic	5.1
Scour-critical bridge share	20	11.9%	20.0
Average age vs national baseline	10	64 years vs 48 nationally	6.6
Traffic-data completeness	5	983,844 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	17.2%
State Poor-Condition Share	12.1%
National Poor-Condition Share	6.7%
County Scour-Critical Share	11.9%
Average Bridge Age	64 years
Poor-Condition Traffic Exposure	66,302 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgePa Tpk (i-476) over Mud Run — 22,283 vehicles/day Oldest Listed BridgeGlen Onoko Bridge over Lehigh River — built in 1812 All County BridgesBrowse every bridge record in Carbon County.

Top Bridges to Watch in Carbon County

Bridge	Reason	Condition	Daily Traffic	Year Built
SR 2002(appl.1461) over Little Aquashicola Creek	Poor condition + traffic exposure	Poor	10,968	1922
SR 903(lr 550) over Mud Run	Poor condition + traffic exposure	Poor	5,877	1932
Pa 93 over Quakake Creek	Poor condition + traffic exposure	Poor	4,225	1927
Pa 534 (lr 13018) over Mud Run	Poor condition + traffic exposure	Poor	2,356	1961
SR 2002 (lr 13013) over Borger Creek	Poor condition + traffic exposure	Poor	2,158	1930
East Penn Street over Mahoning Creek	Poor condition + traffic exposure	Poor	500	1971
SR 3005(lr 13032) over Mahoning Creek	Poor condition + traffic exposure	Poor	403	1929
T-520(meckes Lane) over Black Creek	Poor condition + traffic exposure	Poor	50	1890
Pa Tpk (i-476) over Mud Run	Poor condition + traffic exposure	Poor	22,283	1957
I80 EB (lr1009) over Ramps G & H SR 8004	Poor condition + traffic exposure	Poor	9,892	1965

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.