US Bridges

State Route 4 over Kellogg Creek

Fair

Contra Costa County, California · 04-CC-004-45.56 · Structure no. 28 0032

Built
1990
35 years old, rebuilt 2012
Condition
Fair
inspected June 2023
Type
Slab
Concrete Continuous
Length
86 ft
3 main spans
Daily traffic
18,900
2017 count
Owner
State
State Highway Agency

About this bridge

State Route 4 over Kellogg Creek is a concrete continuous slab carrying State Route 4 over Kellogg Creek in Contra Costa County, California. It was built in 1990 and reconstructed in 2012, so it is 35 years old, younger 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 5 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 18,900 vehicles a day, roughly 15% of them trucks, projected to reach 28,829 by 2045. The structure is 86 ft (26.1 m) long and 50 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesState Route 4
CrossesKellogg Creek
Location04-CC-004-45.56
RouteState Highway 4
CountyContra Costa County
StateCalifornia
Coordinates37.88932, -121.61857
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
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 geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.6 US tons
Inventory rating29.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length86 ft (26.1 m)
Longest span28 ft (8.5 m)
Deck width50 ft (15.1 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,900 (2017)
Projected traffic28,829 by 2045
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 State Route 4 over Kellogg Creek built?

It was built in 1990, making it 35 years old in 2025. It was reconstructed in 2012.

What condition is State Route 4 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 June 2023.

How much traffic does State Route 4 over Kellogg Creek carry?

About 18,900 vehicles per day (2017 count), of which roughly 15% are trucks.

How long is State Route 4 over Kellogg Creek?

The structure is 86 ft (26.1 m) long with a longest span of 28 ft (8.5 m) and a deck 50 ft wide.

Who owns State Route 4 over Kellogg Creek?

It is owned by the State Highway Agency.