Maricopa County Bridge Report Card

Maricopa County scores 99 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

A99 / 100

Local infrastructure snapshot

Maricopa County, Arizona

Maricopa County has 2,854 bridges in the National Bridge Inventory, with 4 rated poor and 15 rated scour-critical. Its poor-condition share of 0.1% is at or below the 1.1% statewide average. Poor-condition bridges carry about 46,745 daily vehicle crossings.

2,854Total Bridges

4Poor (0.1%)

889Fair (31.1%)

15Scour-Critical

Quote-Ready Local Facts

0.1%of county bridges are in poor condition, compared with 1.1% statewide and 6.7% nationally.

46,745daily vehicle crossings are on poor-condition bridges in the county.

15bridges are rated scour-critical, or 0.5% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Maricopa County a Bridge Condition Exposure Score of 99/100 (A). The county has 2,854 bridges in the National Bridge Inventory, including 4 in poor condition and 15 rated scour-critical. Poor-condition bridges carry about 46,745 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	0.1%	0.3
Poor-condition traffic exposure	25	0.1% of measured traffic	0.1
Scour-critical bridge share	20	0.5%	1.1
Average age vs national baseline	10	36 years vs 48 nationally	0.0
Traffic-data completeness	5	69,370,725 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	0.1%
State Poor-Condition Share	1.1%
National Poor-Condition Share	6.7%
County Scour-Critical Share	0.5%
Average Bridge Age	36 years
Poor-Condition Traffic Exposure	46,745 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeShea Boulevard over Indian Bend Wash — 37,601 vehicles/day Oldest Listed BridgeForest 80 over Fish Creek — built in 1900 All County BridgesBrowse every bridge record in Maricopa County.

Top Bridges to Watch in Maricopa County

Bridge	Reason	Condition	Daily Traffic	Year Built
Shea Boulevard over Indian Bend Wash	Poor condition + traffic exposure	Poor	37,601	1976
I-8 EB over Gillespie Canal	Poor condition + traffic exposure	Poor	6,978	1957
IRR BIA RTE 11 over Arizona Canal	Poor condition + traffic exposure	Poor	1,600	1965
IRR BIA RTE 240 over Wash	Poor condition + traffic exposure	Poor	566	1990
Cactus Road over Indian Bend Wash	Scour-critical foundation rating	Fair	57,843	1979
Indian School Road over Grand Canal	Scour-critical foundation rating	Fair	52,404	1979
Thunderbird Road over Cave Creek	Scour-critical foundation rating	Fair	40,125	1965
Bell Road over Cave Creek	Scour-critical foundation rating	Fair	36,376	1976
Tatum Boulevard over Indian Bend Wash	Scour-critical foundation rating	Fair	31,074	1978
15th Avenue over Grand Canal	Scour-critical foundation rating	Fair	23,182	1957

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.