US Bridges

I 10; WB over Speeden Wash

Good

Pima County, Arizona · 27.0 MI E JCT SR B10 · Structure no. 05564

Built
1963
62 years old, rebuilt 1981
Condition
Good
inspected December 2023
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
11,454
2021 count
Owner
State
State Highway Agency

About this bridge

I 10; WB over Speeden Wash is a concrete continuous culvert carrying I 10; WB over Speeden Wash in Pima County, Arizona. It was built in 1963 and reconstructed in 1981, so it is 62 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 11,454 vehicles a day, roughly 21% of them trucks, projected to reach 11,464 by 2041. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 10; WB
CrossesSpeeden Wash
Location27.0 MI E JCT SR B10
RouteInterstate 10
StateArizona
Coordinates31.97276, -110.48672
Functional classRural Principal Arterial - Interstate

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 inspectionDecember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating41 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 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 traffic11,454 (2021)
Projected traffic11,464 by 2041
Trucks21%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 I 10; WB over Speeden Wash built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1981.

What condition is I 10; WB over Speeden 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 December 2023.

How much traffic does I 10; WB over Speeden Wash carry?

About 11,454 vehicles per day (2021 count), of which roughly 21% are trucks.

How long is I 10; WB over Speeden Wash?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns I 10; WB over Speeden Wash?

It is owned by the State Highway Agency.