US Bridges

Pittsb-Antioch HWY over Kirker Creek

Fair

Contra Costa County, California · 0.6 MI E of Harbor ST · Structure no. 28C0496

Built
1950
75 years old, rebuilt 2005
Condition
Fair
inspected December 2023
Type
Culvert
Concrete Continuous
Length
28 ft
2 main spans
Daily traffic
10,610
2016 count
Owner
City
City or Municipal Highway Agency

About this bridge

Pittsb-Antioch HWY over Kirker Creek is a concrete continuous culvert carrying Pittsb-Antioch HWY over Kirker Creek in Contra Costa County, California. It was built in 1950 and reconstructed in 2005, so it is 75 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 10,610 vehicles a day, roughly 5% of them trucks, projected to reach 22,100 by 2042. The structure is 28 ft (8.5 m) long and 50 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesPittsb-Antioch HWY
CrossesKirker Creek
Location0.6 MI E of Harbor ST
RouteCounty Highway 0
CountyContra Costa County
StateCalifornia
Coordinates38.01825, -121.86957
Functional classUrban Other Principal Arterial

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span13 ft (4.1 m)
Deck width50 ft (15.2 m)
Roadway width45 ft (13.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,610 (2016)
Projected traffic22,100 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

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 Pittsb-Antioch HWY over Kirker Creek built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2005.

What condition is Pittsb-Antioch HWY over Kirker 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 December 2023.

How much traffic does Pittsb-Antioch HWY over Kirker Creek carry?

About 10,610 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Pittsb-Antioch HWY over Kirker Creek?

The structure is 28 ft (8.5 m) long with a longest span of 13 ft (4.1 m) and a deck 50 ft wide.

Who owns Pittsb-Antioch HWY over Kirker Creek?

It is owned by the City or Municipal Highway Agency.