US Bridges

13th ST over Wildcat Creek

Good

Contra Costa County, California · 0.1 MI S of Brookside Dr. · Structure no. 28C0324

Built
1994
31 years old
Condition
Good
inspected December 2024
Type
Culvert
Concrete Continuous
Length
34 ft
2 main spans
Daily traffic
25,106
2010 count
Owner
City
City or Municipal Highway Agency

About this bridge

13th ST over Wildcat Creek is a concrete continuous culvert carrying 13th ST over Wildcat Creek in Contra Costa County, California. It was built in 1994, so it is 31 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 25,106 vehicles a day, roughly 1% of them trucks, projected to reach 29,531 by 2046. The structure is 34 ft (10.4 m) long and 76 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Carries13th ST
CrossesWildcat Creek
Location0.1 MI S of Brookside Dr.
RouteCity Street 0
Coordinates37.96188, -122.35577
Functional classUrban Minor 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length34 ft (10.4 m)
Longest span15 ft (4.7 m)
Deck width76 ft (23.3 m)
Roadway width65 ft (19.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,106 (2010)
Projected traffic29,531 by 2046
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 13th ST over Wildcat Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is 13th ST over Wildcat 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 December 2024.

How much traffic does 13th ST over Wildcat Creek carry?

About 25,106 vehicles per day (2010 count), of which roughly 1% are trucks.

How long is 13th ST over Wildcat Creek?

The structure is 34 ft (10.4 m) long with a longest span of 15 ft (4.7 m) and a deck 76 ft wide.

Who owns 13th ST over Wildcat Creek?

It is owned by the City or Municipal Highway Agency.