US Bridges

Speedway Blvd over Alamo Wash

Good

Pima County, Arizona · 0.2 MI W JCT Wilmot RD · Structure no. 10447

Built
1997
28 years old
Condition
Good
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
37 ft
1 main span
Daily traffic
36,606
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Speedway Blvd over Alamo Wash is a prestressed concrete box beam or girders - multiple carrying Speedway Blvd over Alamo Wash in Pima County, Arizona. It was built in 1997, so it is 28 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 36,606 vehicles a day, roughly 10% of them trucks, projected to reach 36,616 by 2042. The structure is 37 ft (11.3 m) long and 124 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSpeedway Blvd
CrossesAlamo Wash
Location0.2 MI W JCT Wilmot RD
RouteCity Street 0
CountyPima County
StateArizona
Coordinates32.2361, -110.8622
Functional classUrban Other Principal Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86 US tons
Inventory rating52 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length37 ft (11.3 m)
Longest span35 ft (10.7 m)
Deck width124 ft (37.8 m)
Roadway width92 ft (28 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,606 (2022)
Projected traffic36,616 by 2042
Trucks10%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 Alamo Wash built?

It was built in 1997, making it 28 years old in 2025.

What condition is Speedway Blvd over Alamo 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 March 2023.

How much traffic does Speedway Blvd over Alamo Wash carry?

About 36,606 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Speedway Blvd over Alamo Wash?

The structure is 37 ft (11.3 m) long with a longest span of 35 ft (10.7 m) and a deck 124 ft wide.

Who owns Speedway Blvd over Alamo Wash?

It is owned by the City or Municipal Highway Agency.