Structure 6576 · Santa Cruz County, AZ

SR 189 over Wash

Carries SR 189 over Wash, 2.9 Mi W Jct I-19.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT26 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 26 ft across with 2 openings. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights, so those are drawn as typical for a culvert.

Built1975rebuilt 2011
Length25.9 ft7.9 m
Daily traffic9,906counted 2024
Last inspectedMay 2024every 48 months

Location

StateArizona
CountySanta Cruz
Location2.9 Mi W Jct I-19
CarriesSR 189
CrossesWash
Coordinates31.33310, -110.96610

Physical Characteristics

MaterialSteel
DesignCulvert
Total Length25.9 ft (7.9 m)
Max Span11.2 ft (3.4 m)
Deck Area269.4 sq m
Main Spans2
Year Built1975 (reconstructed 2011)

Traffic

Avg Daily Traffic9,906 (2024)
Truck Traffic9%
Lanes On Bridge8

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number06576

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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