Anchorage County Bridge Report Card
Anchorage County scores 93 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Anchorage County, Alaska
Anchorage County has 134 bridges in the National Bridge Inventory, with 0 rated poor and 5 rated scour-critical. Its poor-condition share of 0.0% is at or below the 7.5% statewide average.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Anchorage County a Bridge Condition Exposure Score of 93/100 (A). The county has 134 bridges in the National Bridge Inventory, including 0 in poor condition and 5 rated scour-critical. Poor-condition bridges carry about 0 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 | 0.0% | 0.0 |
| Poor-condition traffic exposure | 25 | 0.0% of measured traffic | 0.0 |
| Scour-critical bridge share | 20 | 3.7% | 7.5 |
| Average age vs national baseline | 10 | 34 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 1,332,408 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 | 0.0% |
| State Poor-Condition Share | 7.5% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 3.7% |
| Average Bridge Age | 34 years |
| Poor-Condition Traffic Exposure | 0 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Anchorage County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Minn DR S.b. over Campbell CR Minn DR S.b. | Scour-critical foundation rating | Fair | 13,900 | 1985 |
| Minn DR N.b. over Campbell CR Minn DR N.b. | Scour-critical foundation rating | Good | 13,900 | 1985 |
| A ST over Chester Creek | Scour-critical foundation rating | Fair | 10,700 | 1985 |
| Minn-dimnd Offramp over Campbell Creek SB Ramp | Scour-critical foundation rating | Good | 5,660 | 1981 |
| Dimnd-minn On-ramp over Campbell Creek NB Ramp | Scour-critical foundation rating | Fair | 4,690 | 1981 |
| Glenn Highway over Ship Creek | High traffic | Fair | 60,000 | 1988 |
| Seward Highway over Dowling RD Underxing | High traffic | Good | 47,700 | 2022 |
| Seward Highway over Dimond BLVD Underxing | High traffic | Fair | 41,300 | 1976 |
| Seward Highway over 76th AVE Undercrossing | High traffic | Good | 41,300 | 2017 |
| Airport/minnesota over Minnesota DR Overhead | High traffic | Good | 31,600 | 1993 |
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.