US Bridges

I-10 EB over Earp Wash Trib

Good

Pima County, Arizona · 7.3 MI E JCT I-19 · Structure no. 01044

Built
1958
67 years old, rebuilt 1985
Condition
Good
inspected January 2024
Type
Slab
Concrete Continuous
Length
94 ft
4 main spans
Daily traffic
71,010
2023 count
Owner
State
State Highway Agency

About this bridge

I-10 EB over Earp Wash Trib is a concrete continuous slab carrying I-10 EB over Earp Wash Trib in Pima County, Arizona. It was built in 1958 and reconstructed in 1985, so it is 67 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 71,010 vehicles a day, roughly 15% of them trucks, projected to reach 71,020 by 2042. The structure is 94 ft (28.7 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-10 EB
CrossesEarp Wash Trib
Location7.3 MI E JCT I-19
RouteInterstate 10
StateArizona
Coordinates32.12883, -110.88109
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41 US tons
Inventory rating24 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length94 ft (28.7 m)
Longest span25 ft (7.6 m)
Deck width52 ft (15.8 m)
Roadway width49 ft (14.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic71,010 (2023)
Projected traffic71,020 by 2042
Trucks15%
Lanes on structure3
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 EB over Earp Wash Trib built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1985.

What condition is I-10 EB over Earp Wash Trib 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 January 2024.

How much traffic does I-10 EB over Earp Wash Trib carry?

About 71,010 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is I-10 EB over Earp Wash Trib?

The structure is 94 ft (28.7 m) long with a longest span of 25 ft (7.6 m) and a deck 52 ft wide.

Who owns I-10 EB over Earp Wash Trib?

It is owned by the State Highway Agency.