US Bridges

Vasco Road over Kellogg Creek

Good

Contra Costa County, California · 0.1 MI S Walnut Blvd · Structure no. 28C0231

Built
1996
29 years old
Condition
Good
inspected July 2022
Type
Culvert
Concrete Continuous
Length
37 ft
2 main spans
Daily traffic
17,424
2013 count
Owner
County
County Highway Agency

About this bridge

Vasco Road over Kellogg Creek is a concrete continuous culvert carrying Vasco Road over Kellogg Creek in Contra Costa County, California. It was built in 1996, so it is 29 years old, younger 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 17,424 vehicles a day, roughly 8% of them trucks, projected to reach 26,367 by 2039. The structure is 37 ft (11.3 m) long. If it were closed, the detour would be 7.5 mi (12 km).

CarriesVasco Road
CrossesKellogg Creek
Location0.1 MI S Walnut Blvd
RouteCounty Highway 0
Coordinates37.8872, -121.69507
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length37 ft (11.3 m)
Longest span17 ft (5.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,424 (2013)
Projected traffic26,367 by 2039
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed7.5 mi (12 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 Vasco Road over Kellogg Creek built?

It was built in 1996, making it 29 years old in 2025.

What condition is Vasco Road over Kellogg Creek 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 July 2022.

How much traffic does Vasco Road over Kellogg Creek carry?

About 17,424 vehicles per day (2013 count), of which roughly 8% are trucks.

How long is Vasco Road over Kellogg Creek?

The structure is 37 ft (11.3 m) long with a longest span of 17 ft (5.2 m).

Who owns Vasco Road over Kellogg Creek?

It is owned by the County Highway Agency.