US Bridges

Oak Grove RD over Pine Creek

Good

Contra Costa County, California · 0.5 MI N Walnut Ave · Structure no. 28C0352

Built
1974
51 years old
Condition
Good
inspected November 2023
Type
Slab
Concrete
Length
28 ft
1 main span
Daily traffic
6,600
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Oak Grove RD over Pine Creek is a concrete slab carrying Oak Grove RD over Pine Creek in Contra Costa County, California. It was built in 1974, so it is 51 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 6,600 vehicles a day, roughly 3% of them trucks, projected to reach 9,500 by 2041. The structure is 28 ft (8.5 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesOak Grove RD
CrossesPine Creek
Location0.5 MI N Walnut Ave
RouteCity Street 0
Coordinates37.92087, -122.01064
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 protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110 US tons
Inventory rating102.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span22 ft (6.6 m)
Deck width41 ft (12.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,600 (2019)
Projected traffic9,500 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Oak Grove RD over Pine Creek built?

It was built in 1974, making it 51 years old in 2025.

What condition is Oak Grove RD over Pine 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 November 2023.

How much traffic does Oak Grove RD over Pine Creek carry?

About 6,600 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is Oak Grove RD over Pine Creek?

The structure is 28 ft (8.5 m) long with a longest span of 22 ft (6.6 m) and a deck 41 ft wide.

Who owns Oak Grove RD over Pine Creek?

It is owned by the City or Municipal Highway Agency.