US Bridges

Interstate 8 over Pilot Wash

Good

Imperial County, California · 11-IMP-008-R90.03 · Structure no. 58 0109

Built
1970
55 years old
Condition
Good
inspected January 2025
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
15,100
2022 count
Owner
State
State Highway Agency

About this bridge

Interstate 8 over Pilot Wash is a concrete culvert carrying Interstate 8 over Pilot Wash in Imperial County, California. It was built in 1970, so it is 55 years old, older than the California average of 54.8 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 15,100 vehicles a day, roughly 20% of them trucks, projected to reach 21,638 by 2042. The structure is 22 ft (6.7 m) long and 121 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesInterstate 8
CrossesPilot Wash
Location11-IMP-008-R90.03
RouteInterstate 8
CountyImperial County
StateCalifornia
Coordinates32.74485, -114.73217
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 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width121 ft (37 m)
Roadway width118 ft (36 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,100 (2022)
Projected traffic21,638 by 2042
Trucks20%
Lanes on structure4
Traffic directionTwo-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 Interstate 8 over Pilot Wash built?

It was built in 1970, making it 55 years old in 2025.

What condition is Interstate 8 over Pilot 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 Interstate 8 over Pilot Wash carry?

About 15,100 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is Interstate 8 over Pilot Wash?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 121 ft wide.

Who owns Interstate 8 over Pilot Wash?

It is owned by the State Highway Agency.