US Bridges

State Route 58 over Main Drain Canal

Fair

Kern County, California · 06-KER-058-27.82 · Structure no. 50 0013

Built
1948
77 years old, rebuilt 1962
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
53 ft
3 main spans
Daily traffic
9,000
2016 count
Owner
State
State Highway Agency

About this bridge

State Route 58 over Main Drain Canal is a concrete continuous slab carrying State Route 58 over Main Drain Canal in Kern County, California. It was built in 1948 and reconstructed in 1962, so it is 77 years old, older 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 9,000 vehicles a day, projected to reach 17,000 by 2040. The structure is 53 ft (16.2 m) long and 67 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesState Route 58
CrossesMain Drain Canal
Location06-KER-058-27.82
RouteState Highway 58
Coordinates35.39961, -119.46481
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.2 US tons
Inventory rating35.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length53 ft (16.2 m)
Longest span20 ft (6.1 m)
Deck width67 ft (20.3 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,000 (2016)
Projected traffic17,000 by 2040
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was State Route 58 over Main Drain Canal built?

It was built in 1948, making it 77 years old in 2025. It was reconstructed in 1962.

What condition is State Route 58 over Main Drain Canal 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 May 2023.

How much traffic does State Route 58 over Main Drain Canal carry?

About 9,000 vehicles per day (2016 count).

How long is State Route 58 over Main Drain Canal?

The structure is 53 ft (16.2 m) long with a longest span of 20 ft (6.1 m) and a deck 67 ft wide.

Who owns State Route 58 over Main Drain Canal?

It is owned by the State Highway Agency.