US Bridges

I 10; Ramp C over Wash

Good

Maricopa County, Arizona · 4.9 MI E JCT SR 85 · Structure no. 06578

Built
1975
50 years old
Condition
Good
inspected January 2023
Type
Culvert
Concrete Continuous
Length
54 ft
5 main spans
Daily traffic
1,769
2021 count
Owner
State
State Highway Agency

About this bridge

I 10; Ramp C over Wash is a concrete continuous culvert carrying I 10; Ramp C over Wash in Maricopa County, Arizona. It was built in 1975, so it is 50 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 1,769 vehicles a day, roughly 16% of them trucks, projected to reach 1,779 by 2041. The structure is 54 ft (16.5 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesI 10; Ramp C
CrossesWash
Location4.9 MI E JCT SR 85
RouteInterstate 10
CountyMaricopa County
StateArizona
Coordinates33.46167, -112.48
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating42 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans5
Design loadHS 20
Structure length54 ft (16.5 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 traffic1,769 (2021)
Projected traffic1,779 by 2041
Trucks16%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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; Ramp C over Wash built?

It was built in 1975, making it 50 years old in 2025.

What condition is I 10; Ramp C over 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 January 2023.

How much traffic does I 10; Ramp C over Wash carry?

About 1,769 vehicles per day (2021 count), of which roughly 16% are trucks.

How long is I 10; Ramp C over Wash?

The structure is 54 ft (16.5 m) long with a longest span of 10 ft (3 m).

Who owns I 10; Ramp C over Wash?

It is owned by the State Highway Agency.