US Bridges

Byron HWY over Kellogg Creek

Fair

Contra Costa County, California · 0.5 MI S SR 4 · Structure no. 28C0122

Built
1940
85 years old, rebuilt 1953
Condition
Fair
inspected July 2024
Type
Culvert
Concrete Continuous
Length
30 ft
2 main spans
Daily traffic
13,637
2013 count
Owner
County
County Highway Agency

About this bridge

Byron HWY over Kellogg Creek is a concrete continuous culvert carrying Byron HWY over Kellogg Creek in Contra Costa County, California. It was built in 1940 and reconstructed in 1953, so it is 85 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 6 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 13,637 vehicles a day, roughly 12% of them trucks, projected to reach 27,149 by 2046. The structure is 30 ft (9.1 m) long and 41 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesByron HWY
CrossesKellogg Creek
Location0.5 MI S SR 4
RouteCounty Highway 0
CountyContra Costa County
StateCalifornia
Coordinates37.88189, -121.64142
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span13 ft (4.1 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,637 (2013)
Projected traffic27,149 by 2046
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Byron HWY over Kellogg Creek built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1953.

What condition is Byron HWY over Kellogg Creek 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 July 2024.

How much traffic does Byron HWY over Kellogg Creek carry?

About 13,637 vehicles per day (2013 count), of which roughly 12% are trucks.

How long is Byron HWY over Kellogg Creek?

The structure is 30 ft (9.1 m) long with a longest span of 13 ft (4.1 m) and a deck 41 ft wide.

Who owns Byron HWY over Kellogg Creek?

It is owned by the County Highway Agency.