US Bridges

Speedway Blvd over Silvercroft Wash

Good

Pima County, Arizona · 0.1 MI E JCT Slvrbell RD · Structure no. 09524

Built
1970
55 years old, rebuilt 1991
Condition
Good
inspected August 2023
Type
Culvert
Concrete Continuous
Length
58 ft
5 main spans
Daily traffic
25,518
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Speedway Blvd over Silvercroft Wash is a concrete continuous culvert carrying Speedway Blvd over Silvercroft Wash in Pima County, Arizona. It was built in 1970 and reconstructed in 1991, so it is 55 years old, older 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 25,518 vehicles a day, roughly 10% of them trucks, projected to reach 25,528 by 2042. The structure is 58 ft (17.7 m) long and 100 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSpeedway Blvd
CrossesSilvercroft Wash
Location0.1 MI E JCT Slvrbell RD
RouteCity Street 0
CountyPima County
StateArizona
Coordinates32.2356, -111.0022
Functional classUrban Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating33 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length58 ft (17.7 m)
Longest span11 ft (3.4 m)
Deck width100 ft (30.5 m)
Roadway width80 ft (24.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,518 (2023)
Projected traffic25,528 by 2042
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Speedway Blvd over Silvercroft Wash built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1991.

What condition is Speedway Blvd over Silvercroft 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 August 2023.

How much traffic does Speedway Blvd over Silvercroft Wash carry?

About 25,518 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Speedway Blvd over Silvercroft Wash?

The structure is 58 ft (17.7 m) long with a longest span of 11 ft (3.4 m) and a deck 100 ft wide.

Who owns Speedway Blvd over Silvercroft Wash?

It is owned by the City or Municipal Highway Agency.