Structure 7817 · Maricopa County, AZ

Mill Avenue NB over Salt Rvr Rio Salado Pkw

Carries Mill Avenue NB over Salt Rvr Rio Salado Pkw, 0.2 Mi S Of Curry RD.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructure8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,510 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 7/9 · sets the ratingSubstructure 8/9

1,510 ft end to end, longest span 150 ft: about 4.2 football fields. 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 box-beam bridge.

Built199432 years old
Length1509.8 ft460.2 m
Daily traffic9,245counted 2023
Last inspectedSeptember 2023every 24 months

Location

StateArizona
CountyMaricopa
Location0.2 Mi S Of Curry RD
CarriesMill Avenue NB
CrossesSalt Rvr Rio Salado Pkw
Coordinates33.43130, -111.94000

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignBox Beam - Single/Spread
Total Length1509.8 ft (460.2 m)
Max Span149.9 ft (45.7 m)
Deck Width47.9 ft (14.6 m)
Deck Area6718.9 sq m
Main Spans10
Year Built1994

Traffic

Avg Daily Traffic9,245 (2023)
Truck Traffic10%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number07817

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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