Structure 792 · La Paz County, AZ

I-10 WB over Tyson Wash

Carries I-10 WB over Tyson Wash, 0.3 Mi W Jct US 95.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
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 FT410 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

410 ft end to end, longest span 30 ft: about 6 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 slab bridge.

Built1964rebuilt 1979
Length410.1 ft125 m
Daily traffic10,636counted 2018
Last inspectedFebruary 2024every 24 months

Location

StateArizona
CountyLa Paz
Location0.3 Mi W Jct US 95
CarriesI-10 WB
CrossesTyson Wash
Coordinates33.66259, -114.22204

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length410.1 ft (125 m)
Max Span29.9 ft (9.1 m)
Deck Width45.3 ft (13.8 m)
Deck Area1,725 sq m
Main Spans14
Year Built1964 (reconstructed 1979)

Traffic

Avg Daily Traffic10,636 (2018)
Truck Traffic30%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number00792

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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