North Slope County Bridge Report Card

North Slope County scores 68 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

D68 / 100

Local infrastructure snapshot

North Slope County, Alaska

North Slope County has 16 bridges in the National Bridge Inventory, with 1 rated poor and 3 rated scour-critical. Its poor-condition share of 6.2% is at or below the 7.5% statewide average.

16Total Bridges

1Poor (6.2%)

5Fair (31.2%)

3Scour-Critical

Quote-Ready Local Facts

6.2%of county bridges are in poor condition, compared with 7.5% statewide and 6.7% nationally.

0daily vehicle crossings are on poor-condition bridges in the county.

3bridges are rated scour-critical, or 18.8% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives North Slope County a Bridge Condition Exposure Score of 68/100 (D). The county has 16 bridges in the National Bridge Inventory, including 1 in poor condition and 3 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.

Download all county report-card scores as CSV.

How the Score Breaks Down

Factor	Weight	County Value	Penalty
Poor-condition bridge share	40	6.2%	12.5
Poor-condition traffic exposure	25	0.0% of measured traffic	0.0
Scour-critical bridge share	20	18.8%	20.0
Average age vs national baseline	10	29 years vs 48 nationally	0.0
Traffic-data completeness	5	1,770 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	6.2%
State Poor-Condition Share	7.5%
National Poor-Condition Share	6.7%
County Scour-Critical Share	18.8%
Average Bridge Age	29 years
Poor-Condition Traffic Exposure	0 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeIRR BIA RTE 002 over Unnamed Stream — 0 vehicles/day Oldest Listed BridgeDalton Highway over Marx Creek — built in 1972 All County BridgesBrowse every bridge record in North Slope County.

Top Bridges to Watch in North Slope County

Bridge	Reason	Condition	Daily Traffic	Year Built
IRR BIA RTE 002 over Unnamed Stream	Poor condition	Poor	0	1980
Dalton Highway over Trevor Creek	Scour-critical foundation rating	Fair	130	1982
Dalton Highway over Dan Creek	Scour-critical foundation rating	Fair	130	1982
Dalton Highway over West Fork N Fk Chandalar	Scour-critical foundation rating	Fair	110	1982
Dalton Highway over Marx Creek	High traffic	Fair	130	1972
Dalton Highway over Kuparuk River	High traffic	Fair	130	1994
Dalton Highway over Atigun River No. 2	High traffic	Good	130	2000
Dalton Highway over Atigun River No. 1	High traffic	Good	130	2000
Dalton Highway over Oksrukuyik Creek No. 2	High traffic	Good	130	2011
Dalton Highway over Oksrukuyik Creek No. 1	High traffic	Good	130	2012

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.