US Bridges

Newport Drive over Kellogg Creek

Fair

Contra Costa County, California · 0.6 MI North of SR 4 · Structure no. 28C0251

Built
1987
38 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete Continuous
Length
83 ft
3 main spans
Daily traffic
1,500
2013 count
Owner
County
County Highway Agency

About this bridge

Newport Drive over Kellogg Creek is a concrete continuous slab carrying Newport Drive over Kellogg Creek in Contra Costa County, California. It was built in 1987, so it is 38 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 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 1,500 vehicles a day, roughly 20% of them trucks, projected to reach 3,240 by 2046. The structure is 83 ft (25.3 m) long and 38 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNewport Drive
CrossesKellogg Creek
Location0.6 MI North of SR 4
RouteCity Street 0
CountyContra Costa County
StateCalifornia
Coordinates37.89438, -121.61783
Functional classUrban Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length83 ft (25.3 m)
Longest span32 ft (9.8 m)
Deck width38 ft (11.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2013)
Projected traffic3,240 by 2046
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Newport Drive over Kellogg Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is Newport Drive 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 July 2024.

How much traffic does Newport Drive over Kellogg Creek carry?

About 1,500 vehicles per day (2013 count), of which roughly 20% are trucks.

How long is Newport Drive over Kellogg Creek?

The structure is 83 ft (25.3 m) long with a longest span of 32 ft (9.8 m) and a deck 38 ft wide.

Who owns Newport Drive over Kellogg Creek?

It is owned by the County Highway Agency.