US Bridges

Winterhaven Road over Interstate 8

Good

Imperial County, California · 11-IMP-008-R94.98 · Structure no. 58 0309

Built
1973
52 years old
Condition
Good
inspected January 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
218 ft
2 main spans
Daily traffic
6,404
2022 count
Owner
State
State Highway Agency

About this bridge

Winterhaven Road over Interstate 8 is a prestressed concrete continuous box beam or girders - multiple carrying Winterhaven Road over Interstate 8 in Imperial County, California. It was built in 1973, so it is 52 years old, younger 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 6,404 vehicles a day, roughly 2% of them trucks, projected to reach 15,767 by 2042. The structure is 218 ft (66.4 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesWinterhaven Road
CrossesInterstate 8
Location11-IMP-008-R94.98
RouteCounty Highway 0W988
Coordinates32.73719, -114.6506
Functional classUrban 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 inspectionJanuary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.6 US tons
Inventory rating44.3 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length218 ft (66.4 m)
Longest span111 ft (33.8 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,404 (2022)
Projected traffic15,767 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 Winterhaven Road over Interstate 8 built?

It was built in 1973, making it 52 years old in 2025.

What condition is Winterhaven 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 January 2025.

How much traffic does Winterhaven Road over Interstate 8 carry?

About 6,404 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Winterhaven Road over Interstate 8?

The structure is 218 ft (66.4 m) long with a longest span of 111 ft (33.8 m) and a deck 43 ft wide.

Who owns Winterhaven Road over Interstate 8?

It is owned by the State Highway Agency.