US Bridges

Dunaway Road over Interstate 8

Good

Imperial County, California · 11-IMP-008-R23.48 · Structure no. 58 0313

Built
1968
57 years old
Condition
Good
inspected February 2025
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
224 ft
2 main spans
Daily traffic
250
2019 count
Owner
State
State Highway Agency

About this bridge

Dunaway Road over Interstate 8 is a concrete continuous box beam or girders - multiple carrying Dunaway Road over Interstate 8 in Imperial County, California. It was built in 1968, so it is 57 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 250 vehicles a day, roughly 2% of them trucks, projected to reach 733 by 2046. The structure is 224 ft (68.3 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesDunaway Road
CrossesInterstate 8
Location11-IMP-008-R23.48
RouteCounty Highway 0W993
Coordinates32.76892, -115.80048
Functional classRural Minor Collector

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.
Last inspectionFebruary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating41.1 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length224 ft (68.3 m)
Longest span112 ft (34.1 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2019)
Projected traffic733 by 2046
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Dunaway Road over Interstate 8 built?

It was built in 1968, making it 57 years old in 2025.

What condition is Dunaway Road over Interstate 8 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 February 2025.

How much traffic does Dunaway Road over Interstate 8 carry?

About 250 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is Dunaway Road over Interstate 8?

The structure is 224 ft (68.3 m) long with a longest span of 112 ft (34.1 m) and a deck 34 ft wide.

Who owns Dunaway Road over Interstate 8?

It is owned by the State Highway Agency.