US Bridges

Third ST over Wildcat Creek

Good

Contra Costa County, California · 0.1 MI N Market Ave · Structure no. 28C0101

Built
1955
70 years old
Condition
Good
inspected September 2024
Type
Slab
Concrete
Length
93 ft
3 main spans
Daily traffic
3,119
2016 count
Owner
County
County Highway Agency

About this bridge

Third ST over Wildcat Creek is a concrete slab carrying Third ST over Wildcat Creek in Contra Costa County, California. It was built in 1955, so it is 70 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 3,119 vehicles a day, roughly 6% of them trucks, projected to reach 6,477 by 2044. The structure is 93 ft (28.3 m) long and 45 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesThird ST
CrossesWildcat Creek
Location0.1 MI N Market Ave
RouteCounty Highway 0
Coordinates37.96027, -122.36683
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 alignment6: Equal to present minimum criteria
Operating rating29.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length93 ft (28.3 m)
Longest span30 ft (9.1 m)
Deck width45 ft (13.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,119 (2016)
Projected traffic6,477 by 2044
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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 Third ST over Wildcat Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is Third 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 September 2024.

How much traffic does Third ST over Wildcat Creek carry?

About 3,119 vehicles per day (2016 count), of which roughly 6% are trucks.

How long is Third ST over Wildcat Creek?

The structure is 93 ft (28.3 m) long with a longest span of 30 ft (9.1 m) and a deck 45 ft wide.

Who owns Third ST over Wildcat Creek?

It is owned by the County Highway Agency.