Structure 8912 · Pima County, AZ

Elephant Head RD over Santa Cruz River

Carries Elephant Head RD over Santa Cruz River, 0.5 Mi E I 10.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT488 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

488 ft end to end, longest span 60 ft: about 7 semi-trucks nose to tail. Lengths and the semi-truck 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 or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built198640 years old
Length487.9 ft148.7 m
Daily traffic200counted 2022
Last inspectedDecember 2023every 24 months

Location

StateArizona
CountyPima
Location0.5 Mi E I 10
CarriesElephant Head RD
CrossesSanta Cruz River
Coordinates31.74500, -111.03700

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length487.9 ft (148.7 m)
Max Span60.0 ft (18.3 m)
Deck Width36.1 ft (11 m)
Deck Area1635.7 sq m
Main Spans8
Year Built1986

Traffic

Avg Daily Traffic200 (2022)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number08912

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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