US Bridges

State Route 58 WB over LA Dwp East Aqueduct

Good

Kern County, California · 09-KER-058-M108.60 · Structure no. 50 0497L

Built
2003
22 years old
Condition
Good
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
261 ft
3 main spans
Daily traffic
14,000
2018 count
Owner
State
State Highway Agency

About this bridge

State Route 58 WB over LA Dwp East Aqueduct is a prestressed concrete continuous box beam or girders - multiple carrying State Route 58 WB over LA Dwp East Aqueduct in Kern County, California. It was built in 2003, so it is 22 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 14,000 vehicles a day, roughly 35% of them trucks, projected to reach 20,230 by 2040. The structure is 261 ft (79.6 m) long and 42 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesState Route 58 WB
CrossesLA Dwp East Aqueduct
Location09-KER-058-M108.60
RouteState Highway 58
Coordinates35.11491, -118.18398
Functional classRural Principal Arterial - Other

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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum 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

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length261 ft (79.6 m)
Longest span106 ft (32.3 m)
Deck width42 ft (12.8 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,000 (2018)
Projected traffic20,230 by 2040
Trucks35%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 58 WB over LA Dwp East Aqueduct built?

It was built in 2003, making it 22 years old in 2025.

What condition is State Route 58 WB over LA Dwp East Aqueduct 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 June 2023.

How much traffic does State Route 58 WB over LA Dwp East Aqueduct carry?

About 14,000 vehicles per day (2018 count), of which roughly 35% are trucks.

How long is State Route 58 WB over LA Dwp East Aqueduct?

The structure is 261 ft (79.6 m) long with a longest span of 106 ft (32.3 m) and a deck 42 ft wide.

Who owns State Route 58 WB over LA Dwp East Aqueduct?

It is owned by the State Highway Agency.