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Scour Critical Bridges in Arizona

164 bridges in Arizona at risk from water erosion around foundations.

Scour Critical Bridges

Scour is the erosion of soil and rock around a bridge's foundation caused by moving water. When foundations are exposed or undermined, a bridge can collapse even if its deck and superstructure are in good condition. Scour is the leading cause of bridge failures in the US. These 164 bridges in Arizona have been identified as vulnerable to scour damage.

Clear
Bridge State Scour Status Condition Year Built ADT
Wash Arizona Scour Critical — Countermeasures Installed Good 1951 3,947
Patterson Wash Arizona Scour Critical — Countermeasures Installed Fair 1932 3,757
Gila River Arizona Scour Critical — Countermeasures Installed Good 1988 3,688
Mammoth Wash Arizona Scour Critical — Countermeasures Installed Fair 1956 3,653
Brawley Wash Arizona Scour Critical — Countermeasures Installed Poor 1960 3,531
Fine Wash Arizona Scour Critical — Countermeasures Installed Fair 1932 3,521
Icehouse Canyon Arizona Scour Critical — Countermeasures Installed Good 1920 3,504
Fortuna Wash Arizona Scour Critical — Countermeasures Installed Fair 1933 3,375
Dry Wash Arizona Scour Critical — Countermeasures Installed Fair 1932 2,940
Climas Wash Arizona Scour Critical — Countermeasures Installed Fair 1984 2,912
Stockton Wash Arizona Scour Critical — Countermeasures Installed Fair 1938 2,901
Butler Wash Arizona Scour Critical — Countermeasures Installed Good 1961 2,725
Santa Cruz River Arizona Scour Critical — Countermeasures Installed Poor 1959 2,718
Dodson Wash Arizona Scour Critical — Countermeasures Installed Fair 1964 2,525
Wash Arizona Scour Critical — Countermeasures Installed Fair 1964 2,525
Roach Wash Arizona Scour Critical — Countermeasures Installed Fair 1965 2,525
Gardner Canyon Arizona Scour Critical — Countermeasures Installed Fair 1965 2,488
Zapata Wash Arizona Scour Critical — Countermeasures Installed Fair 1961 2,421
San Pedro River Arizona Scour Critical — Countermeasures Installed Fair 1961 2,411
Coyote Wash Arizona Scour Critical — Countermeasures Installed Fair 1965 2,376
Dry Wash Arizona Scour Critical — Countermeasures Installed Good 1930 2,302
Ligurta Wash Arizona Scour Critical — Countermeasures Installed Fair 1930 2,302
Eskiminzin Wash Arizona Scour Critical — Countermeasures Installed Fair 1965 2,301
Hog Canyon Arizona Scour Critical — Countermeasures Installed Fair 1966 2,234
Adobe Wash Arizona Scour Critical — Countermeasures Installed Fair 1966 2,234
Wash Arizona Scour Critical — Countermeasures Installed Good 1962 2,097
Agua Fria River Arizona Scour Critical — Countermeasures Installed Fair 1950 2,083
Rain Valley Wash Arizona Scour Critical — Countermeasures Installed Fair 1953 1,940
Government Draw Arizona Scour Critical — Countermeasures Installed Fair 1934 1,843
Rio Cornez Wash Arizona Scour Critical — Countermeasures Installed Fair 1938 1,641
Midway Wash Arizona Scour Critical — Countermeasures Installed Fair 1937 1,625
Robb Wash Arizona Scour Critical — Countermeasures Installed Fair 1964 1,519
Gunsight Wash Arizona Scour Critical — Countermeasures Installed Fair 1943 1,498
Roosevelt Lake Arizona Scour Critical — Countermeasures Installed Good 1990 1,447
Florida Canyon Wash Arizona Scour Critical — Countermeasures Installed Poor 1935 1,200
Medium Wash Arizona Scour Critical — Countermeasures Installed Poor 1935 1,200
Campaign Creek Arizona Scour Critical — Countermeasures Installed Fair 1972 1,130
Bumblebee Creek Arizona Scour Critical — Countermeasures Installed Good 1985 1,042
Ash Creek Arizona Scour Critical — Countermeasures Installed Good 1983 1,042
Rock Creek Arizona Scour Critical — Countermeasures Installed Good 1985 1,042
Drain Channel Arizona Scour Critical — Countermeasures Installed Fair 1988 1,010
Drain Channel Arizona Scour Critical — Countermeasures Installed Fair 1988 1,010
Santa Cruz River Arizona Scour Critical — Countermeasures Installed Fair 1963 1,005
Mule Gulch Arizona Scour Critical — Countermeasures Installed Poor 1920 1,000
Nogales Wash Arizona Scour Critical — Countermeasures Installed Fair 1900 1,000
Little Colorado River Arizona Scour Critical — Countermeasures Installed Fair 1961 876
Santa Cruz River Arizona Scour Critical — Countermeasures Installed Poor 1962 871
Santa Cruz River Arizona Scour Critical — Countermeasures Installed Fair 1916 840
Blanco Wash Arizona Scour Critical — Countermeasures Installed Poor 1935 816
Soap Box Canyon Arizona Scour Critical — Countermeasures Installed Poor 1915 800

Scour Critical Rating Codes

Code 2 — UnaddressedBridge is scour critical with no countermeasures installed. The foundation is vulnerable and no protective action has been taken.
Code 3 — Countermeasures InstalledProtective measures (riprap, sheet piling, etc.) have been installed to reduce scour risk, but the bridge remains classified as scour critical.
Code 6 — Countermeasures IneffectiveProtective measures were installed but have been assessed as ineffective. The bridge requires re-evaluation and additional action.

About Scour Critical Bridges

Scour critical bridges have been identified through underwater inspection or analysis as having foundations that are unstable or could become unstable during flood conditions. FHWA requires action plans for all scour critical bridges. Famous scour failures include the 1987 Schoharie Creek Bridge collapse in New York.

All Bridges Poor Condition Historic Bridges Bridge Stats