Dauphin County Bridge Report Card
Dauphin County scores 67 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Dauphin County, Pennsylvania
Dauphin County has 448 bridges in the National Bridge Inventory, with 41 rated poor and 20 rated scour-critical. Its poor-condition share of 9.2% is at or below the 12.1% statewide average. Poor-condition bridges carry about 274,071 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Dauphin County a Bridge Condition Exposure Score of 67/100 (D). The county has 448 bridges in the National Bridge Inventory, including 41 in poor condition and 20 rated scour-critical. Poor-condition bridges carry about 274,071 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.
How the Score Breaks Down
| Factor | Weight | County Value | Penalty |
|---|---|---|---|
| Poor-condition bridge share | 40 | 9.2% | 18.3 |
| Poor-condition traffic exposure | 25 | 4.7% of measured traffic | 3.5 |
| Scour-critical bridge share | 20 | 4.5% | 8.9 |
| Average age vs national baseline | 10 | 53 years vs 48 nationally | 1.9 |
| Traffic-data completeness | 5 | 5,796,746 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 | 9.2% |
| State Poor-Condition Share | 12.1% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 4.5% |
| Average Bridge Age | 53 years |
| Poor-Condition Traffic Exposure | 274,071 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Dauphin County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| SR 3009 over Fishing Creek | Poor condition + traffic exposure | Poor | 7,944 | 1910 |
| SR 4002 Luexumburg over Trib To Deep Creek | Poor condition + traffic exposure | Poor | 2,214 | 1991 |
| SR 2005 Roundtop R over Iron Mine Run | Poor condition + traffic exposure | Poor | 696 | 1934 |
| SR 4013 over Rattling Creek | Poor condition + traffic exposure | Poor | 372 | 1937 |
| SR 4013 over W.branch Rattling Creek | Poor condition + traffic exposure | Poor | 372 | 1974 |
| SR 4002 Luxemburg over Pine Creek | Poor condition + traffic exposure | Poor | 320 | 1860 |
| SR 1017 Honeymoon over Trib To Pine Creek | Poor condition + traffic exposure | Poor | 253 | 1910 |
| West Cross RD T535 over N Fork Powell Creek | Poor condition + traffic exposure | Poor | 75 | 1976 |
| SR 0083; I-83 over Susq.river;r.r.lowther S | Poor condition + traffic exposure | Poor | 89,499 | 1960 |
| US 22; SR 0022 over Susquehanna River | Poor condition + traffic exposure | Poor | 28,506 | 1986 |
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.