US Bridges

State Route 58 over Calloway Canal

Fair

Kern County, California · 0.5 MI W of Mohawk St. · Structure no. 50C0397

Built
1970
55 years old
Condition
Fair
inspected November 2023
Type
Slab
Concrete Continuous
Length
163 ft
5 main spans
Daily traffic
41,250
2009 count
Owner
County
County Highway Agency

About this bridge

State Route 58 over Calloway Canal is a concrete continuous slab carrying State Route 58 over Calloway Canal in Kern County, California. It was built in 1970, so it is 55 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 41,250 vehicles a day, roughly 17% of them trucks, projected to reach 69,905 by 2043. The structure is 163 ft (49.7 m) long and 97 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesState Route 58
CrossesCalloway Canal
Location0.5 MI W of Mohawk St.
RouteCounty Highway 0
CountyKern County
StateCalifornia
Coordinates35.38323, -119.07557
Functional classUrban Other Principal 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.3 US tons
Inventory rating42.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length163 ft (49.7 m)
Longest span32 ft (9.8 m)
Deck width97 ft (29.6 m)
Roadway width70 ft (21.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41,250 (2009)
Projected traffic69,905 by 2043
Trucks17%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Calloway Canal built?

It was built in 1970, making it 55 years old in 2025.

What condition is State Route 58 over Calloway 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 November 2023.

How much traffic does State Route 58 over Calloway Canal carry?

About 41,250 vehicles per day (2009 count), of which roughly 17% are trucks.

How long is State Route 58 over Calloway Canal?

The structure is 163 ft (49.7 m) long with a longest span of 32 ft (9.8 m) and a deck 97 ft wide.

Who owns State Route 58 over Calloway Canal?

It is owned by the County Highway Agency.