US Bridges

I-8 EB over San Cristobal Wash

Good

Yuma County, Arizona · 57.7 MI E JCT US 95 · Structure no. 05257

Built
1955
70 years old, rebuilt 1978
Condition
Good
inspected January 2025
Type
Culvert
Concrete Continuous
Length
65 ft
6 main spans
Daily traffic
4,939
2021 count
Owner
State
State Highway Agency

About this bridge

I-8 EB over San Cristobal Wash is a concrete continuous culvert carrying I-8 EB over San Cristobal Wash in Yuma County, Arizona. It was built in 1955 and reconstructed in 1978, so it is 70 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 4,939 vehicles a day, roughly 26% of them trucks, projected to reach 4,949 by 2041. The structure is 65 ft (19.8 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-8 EB
CrossesSan Cristobal Wash
Location57.7 MI E JCT US 95
RouteInterstate 8
CountyYuma County
StateArizona
Coordinates32.75283, -113.65547
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 inspectionJanuary 2025
Inspection intervalevery 24 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 rating69 US tons
Inventory rating41 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans6
Design loadHS 20
Structure length65 ft (19.8 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 traffic4,939 (2021)
Projected traffic4,949 by 2041
Trucks26%
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-8 EB over San Cristobal Wash built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1978.

What condition is I-8 EB over San Cristobal 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 2025.

How much traffic does I-8 EB over San Cristobal Wash carry?

About 4,939 vehicles per day (2021 count), of which roughly 26% are trucks.

How long is I-8 EB over San Cristobal Wash?

The structure is 65 ft (19.8 m) long with a longest span of 10 ft (3 m).

Who owns I-8 EB over San Cristobal Wash?

It is owned by the State Highway Agency.