US Bridges

State Route 204 over Calloway Canal

Good

Kern County, California · 06-KER-204-5.90 · Structure no. 50 0209

Built
1933
92 years old, rebuilt 1954
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
142 ft
4 main spans
Daily traffic
38,000
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 204 over Calloway Canal is a steel stringer/multi-beam or girder carrying State Route 204 over Calloway Canal in Kern County, California. It was built in 1933 and reconstructed in 1954, so it is 92 years old, older 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 38,000 vehicles a day, roughly 6% of them trucks, projected to reach 77,877 by 2043. The structure is 142 ft (43.3 m) long and 71 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesState Route 204
CrossesCalloway Canal
Location06-KER-204-5.90
RouteState Highway 204
CountyKern County
StateCalifornia
Coordinates35.39709, -119.03276
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 protection7 GoodSome minor problems.
Last inspectionDecember 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating40.7 US tons
Inventory rating24.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length142 ft (43.3 m)
Longest span35 ft (10.7 m)
Deck width71 ft (21.5 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic38,000 (2009)
Projected traffic77,877 by 2043
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible 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 204 over Calloway Canal built?

It was built in 1933, making it 92 years old in 2025. It was reconstructed in 1954.

What condition is State Route 204 over Calloway Canal 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 December 2023.

How much traffic does State Route 204 over Calloway Canal carry?

About 38,000 vehicles per day (2009 count), of which roughly 6% are trucks.

How long is State Route 204 over Calloway Canal?

The structure is 142 ft (43.3 m) long with a longest span of 35 ft (10.7 m) and a deck 71 ft wide.

Who owns State Route 204 over Calloway Canal?

It is owned by the State Highway Agency.