US Bridges

I 10; Frontage RD over Wash

Fair

Pima County, Arizona · 18.6 MI North JCT I 19 · Structure no. 06057

Built
1931
94 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete Continuous
Length
43 ft
4 main spans
Daily traffic
130
2024 count
Owner
State
State Highway Agency

About this bridge

I 10; Frontage RD over Wash is a concrete continuous culvert carrying I 10; Frontage RD over Wash in Pima County, Arizona. It was built in 1931, so it is 94 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 130 vehicles a day, roughly 20% of them trucks, projected to reach 140 by 2042. The structure is 43 ft (13.1 m) long and 33 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesI 10; Frontage RD
CrossesWash
Location18.6 MI North JCT I 19
RouteState Highway 10
CountyPima County
StateArizona
Coordinates32.4123, -111.1462
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating42 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length43 ft (13.1 m)
Longest span10 ft (3 m)
Deck width33 ft (10.2 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic130 (2024)
Projected traffic140 by 2042
Trucks20%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

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; Frontage RD over Wash built?

It was built in 1931, making it 94 years old in 2025.

What condition is I 10; Frontage RD over Wash in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.

How much traffic does I 10; Frontage RD over Wash carry?

About 130 vehicles per day (2024 count), of which roughly 20% are trucks.

How long is I 10; Frontage RD over Wash?

The structure is 43 ft (13.1 m) long with a longest span of 10 ft (3 m) and a deck 33 ft wide.

Who owns I 10; Frontage RD over Wash?

It is owned by the State Highway Agency.