Kauai County Bridge Report Card
Kauai County scores 53 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Kauai County, Hawaii
Kauai County has 85 bridges in the National Bridge Inventory, with 6 rated poor and 9 rated scour-critical. Its poor-condition share of 7.1% is above the 5.7% statewide average. Poor-condition bridges carry about 59,998 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Kauai County a Bridge Condition Exposure Score of 53/100 (F). The county has 85 bridges in the National Bridge Inventory, including 6 in poor condition and 9 rated scour-critical. Poor-condition bridges carry about 59,998 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 | 7.1% | 14.1 |
| Poor-condition traffic exposure | 25 | 7.1% of measured traffic | 5.3 |
| Scour-critical bridge share | 20 | 10.6% | 20.0 |
| Average age vs national baseline | 10 | 67 years vs 48 nationally | 7.7 |
| Traffic-data completeness | 5 | 845,922 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 | 7.1% |
| State Poor-Condition Share | 5.7% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 10.6% |
| Average Bridge Age | 67 years |
| Poor-Condition Traffic Exposure | 59,998 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Kauai County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Kuhio HWY over Wailua River | Poor condition + traffic exposure | Poor | 31,600 | 1945 |
| Kuhio HWY over Kalihiwai River | Poor condition + traffic exposure | Poor | 15,500 | 1963 |
| Koloa RD over Waikomo Stream | Poor condition + traffic exposure | Poor | 12,108 | 1928 |
| Lawai Road over Kukuiula Bay | Poor condition + traffic exposure | Poor | 500 | 1993 |
| Kipu RD over Huleia Strm(kipu Br) | Poor condition + traffic exposure | Poor | 200 | 1914 |
| Koolau RD over Waipake Strm(kiaki Br) | Poor condition + traffic exposure | Poor | 90 | 1921 |
| Kuhio Hwy/plan.rd. over Wailua River | Scour-critical foundation rating | Fair | 31,600 | 1920 |
| Kaumualii HWY over Weoweopilau Strm | Scour-critical foundation rating | Fair | 28,400 | 1937 |
| Kaumualii HWY over Huleia Strm | Scour-critical foundation rating | Good | 26,700 | 1989 |
| Kaumualii HWY over Lawai Strm | Scour-critical foundation rating | Fair | 20,600 | 1934 |
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.