US Bridges

I-10B over Wash

Good

La Paz County, Arizona · 1.1 MI W JCT US 95 · Structure no. 05218

Built
1933
92 years old, rebuilt 2008
Condition
Good
inspected January 2022
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
7,700
2018 count
Owner
State
State Highway Agency

About this bridge

I-10B over Wash is a concrete continuous culvert carrying I-10B over Wash in La Paz County, Arizona. It was built in 1933 and reconstructed in 2008, so it is 92 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 7,700 vehicles a day, roughly 15% of them trucks, projected to reach 7,710 by 2038. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesI-10B
CrossesWash
Location1.1 MI W JCT US 95
RouteState Highway 10
CountyLa Paz County
StateArizona
Coordinates33.6626, -114.2353
Functional classRural Major Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2022
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 rating58 US tons
Inventory rating35.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
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 traffic7,700 (2018)
Projected traffic7,710 by 2038
Trucks15%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-10B over Wash built?

It was built in 1933, making it 92 years old in 2025. It was reconstructed in 2008.

What condition is I-10B 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 2022.

How much traffic does I-10B over Wash carry?

About 7,700 vehicles per day (2018 count), of which roughly 15% are trucks.

How long is I-10B over Wash?

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

Who owns I-10B over Wash?

It is owned by the State Highway Agency.