Superstition Mt RD over Wash

Good

Pinal County, Arizona · 0.9 MI E JCT US60 · Structure no. 11398

Built: 2002; 23 years old
Condition: Good; inspected October 2021
Type: Culvert; Concrete Continuous
Length: 65 ft; 6 main spans
Daily traffic: 4,456; 2020 count
Owner: County; County Highway Agency

About this bridge

Superstition Mt RD over Wash is a concrete continuous culvert carrying Superstition Mt RD over Wash in Pinal County, Arizona. It was built in 2002, so it is 23 years old, younger than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,456 vehicles a day, roughly 5% of them trucks, projected to reach 4,466 by 2040. The structure is 65 ft (19.8 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesSuperstition Mt RD

CrossesWash

Location0.9 MI E JCT US60

RouteCounty Highway 0

CountyPinal County

StateArizona

Coordinates33.37478, -111.46883

Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

Component	Rating	Meaning
Channel and channel protection	6 Satisfactory	Structural elements show some minor deterioration.
Culvert	7 Good	Some minor problems.

Last inspectionOctober 2021

Inspection intervalevery 48 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation7: Better than present minimum criteria

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating70 US tons

Inventory rating41 US tons

Structure

Structure typeCulvert

MaterialConcrete Continuous

DeckNot applicable

Main spans6

Design loadHS 20

Structure length65 ft (19.8 m)

Longest span10 ft (3 m)

Deck width0 ft (0 m)

Roadway width0 ft (0 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,456 (2020)

Projected traffic4,466 by 2040

Trucks5%

Lanes on structure4

Traffic directionTwo-way traffic

CarriesHighway and pedestrian

CrossesWaterway

Detour if closed3.7 mi (6 km)

TollOn a free road

National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency

Maintained byCounty Highway Agency

Historic statusNot eligible for the National Register of Historic Places

Work proposedNone recorded

Estimated improvement cost—

NavigationNo navigation control on waterway

Frequently asked questions

When was Superstition Mt RD over Wash built?

It was built in 2002, making it 23 years old in 2025.

What condition is Superstition Mt RD over Wash in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2021.

How much traffic does Superstition Mt RD over Wash carry?

About 4,456 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Superstition Mt RD over Wash?

The structure is 65 ft (19.8 m) long with a longest span of 10 ft (3 m).

Who owns Superstition Mt RD over Wash?

It is owned by the County Highway Agency.