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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
Brawley Wash Arizona Scour Critical — Countermeasures Installed Fair 1962 794
Jones Wash Arizona Scour Critical — Countermeasures Installed Fair 1965 794
La Cienega Wash Arizona Scour Critical — Countermeasures Installed Fair 1920 627
San Pedro River Arizona Scour Critical — Countermeasures Installed Fair 1969 620
Wash Arizona Scour Critical — Countermeasures Installed Fair 1939 620
Copper Gulch Arizona Scour Critical — Countermeasures Installed Fair 1961 620
Redfield Canyon Arizona Scour Critical — Countermeasures Installed Fair 1971 530
Querino Canyon Arizona Scour Critical — Countermeasures Installed Poor 1931 500
Green Bush Draw Arizona Scour Critical — Countermeasures Installed Fair 1938 500
Greenbush Draw Arizona Scour Critical — Countermeasures Installed Fair 1939 500
Waterway Arizona Scour Critical — Countermeasures Installed Good 1939 482
Santa Maria River Arizona Scour Critical — Countermeasures Installed Fair 1939 453
Wash Arizona Scour Critical — Countermeasures Installed Fair 1924 448
Beaver Dam Wash Arizona Scour Critical — Countermeasures Installed Fair 1975 418
Little Colorado River Arizona Scour Critical — Countermeasures Installed Fair 1975 418
San Francisco River Arizona Scour Critical — Countermeasures Installed Fair 1917 415
Silver Creek Arizona Scour Critical — Countermeasures Installed Fair 1900 400
Blowout Wash Arizona Scour Critical — Countermeasures Installed Fair 1936 381
Little Colorado River Arizona Scour Critical — Countermeasures Installed Fair 1955 378
San Simon River Arizona Scour Critical — Countermeasures Installed Fair 1957 350
Green Gulch Arizona Scour Critical — Countermeasures Installed Fair 1900 330
Davis Wash Arizona Scour Critical — Countermeasures Installed Fair 1939 321
Bailey Wash Arizona Scour Critical — Countermeasures Installed Fair 1973 316
HUACHUCA CANYON CREEK Arizona Scour Critical — Countermeasures Installed Poor 1930 300
Hackberry Creek Arizona Scour Critical — Countermeasures Installed Good 1936 248
Small Wash Arizona Scour Critical — Countermeasures Installed Fair 1930 246
Packer Wash Arizona Scour Critical — Countermeasures Installed Fair 1935 225
Queen Creek Arizona Scour Critical — Countermeasures Installed Fair 1971 210
VERDE RIVER Arizona Scour Critical — Countermeasures Installed Fair 1966 200
Ajo Wash Arizona Scour Critical — Countermeasures Installed Poor 1935 200
Medium Wash Arizona Scour Critical — Countermeasures Installed Fair 1935 200
Medium Wash Arizona Scour Critical — Countermeasures Installed Fair 1935 188
Waters Wash Arizona Scour Critical — Countermeasures Installed Fair 1935 188
PARIA RIVER Arizona Scour Critical — Countermeasures Installed Fair 1964 177
Little Colorado River Arizona Scour Critical — Countermeasures Installed Good 1912 160
Bonita Wash Arizona Scour Critical — Countermeasures Installed Fair 1985 150
Sand Tanks Wash Arizona Scour Critical — Countermeasures Installed Fair 1900 132
Silver Creek Arizona Scour Critical — Countermeasures Installed Fair 1944 100
Black Draw Arizona Scour Critical — Countermeasures Installed Fair 1936 100
Pinal Creek Arizona Scour Critical — Countermeasures Installed Fair 1930 100
Goat Camp Canyon Arizona Scour Critical — Countermeasures Installed Fair 1934 92
Cottonwood Wash Arizona Scour Critical — Countermeasures Installed Fair 1959 75
Wash Arizona Scour Critical — Countermeasures Installed Fair 1920 67
Ltl Lithodendron Wash Arizona Scour Critical — Countermeasures Installed Poor 1932 60
Wash Arizona Scour Critical — Countermeasures Installed Fair 1926 60
Turkey Creek Arizona Scour Critical — Countermeasures Installed Fair 1935 60
Silver Creek Arizona Scour Critical — Countermeasures Installed Fair 1934 60
Slick Rock Wash Arizona Scour Critical — Countermeasures Installed Good 1972 50
Upper San Simon Drainage Arizona Scour Critical — Countermeasures Installed Fair 1974 50
Gila River Arizona Scour Critical — Countermeasures Installed Fair 1918 50

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