US Bridges

SR-58 EB Off Ramp over LA Dwp East Aqueduct

Fair

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

Built
2003
22 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
271 ft
3 main spans
Daily traffic
3,650
2018 count
Owner
State
State Highway Agency

About this bridge

SR-58 EB Off Ramp over LA Dwp East Aqueduct is a prestressed concrete continuous box beam or girders - multiple carrying SR-58 EB Off Ramp 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 fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 3,650 vehicles a day, roughly 35% of them trucks, projected to reach 5,275 by 2040. The structure is 271 ft (82.5 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSR-58 EB Off Ramp
CrossesLA Dwp East Aqueduct
Location09-KER-058-M108.60
RouteState Highway 58
CountyKern County
StateCalifornia
Coordinates35.11459, -118.18402
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry6: Equal to 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

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length271 ft (82.5 m)
Longest span110 ft (33.6 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,650 (2018)
Projected traffic5,275 by 2040
Trucks35%
Lanes on structure1
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 SR-58 EB Off Ramp over LA Dwp East Aqueduct built?

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

What condition is SR-58 EB Off Ramp over LA Dwp East Aqueduct in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2023.

How much traffic does SR-58 EB Off Ramp over LA Dwp East Aqueduct carry?

About 3,650 vehicles per day (2018 count), of which roughly 35% are trucks.

How long is SR-58 EB Off Ramp over LA Dwp East Aqueduct?

The structure is 271 ft (82.5 m) long with a longest span of 110 ft (33.6 m) and a deck 27 ft wide.

Who owns SR-58 EB Off Ramp over LA Dwp East Aqueduct?

It is owned by the State Highway Agency.