US Bridges

State Route 4 over Grayson Creek

Good

Contra Costa County, California · 04-CC-004-12.89 · Structure no. 28 0415

Built
2021
4 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
265 ft
3 main spans
Daily traffic
82,600
2019 count
Owner
State
State Highway Agency

About this bridge

State Route 4 over Grayson Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying State Route 4 over Grayson Creek in Contra Costa County, California. It was built in 2021, so it is 4 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 82,600 vehicles a day, roughly 7% of them trucks, projected to reach 125,000 by 2042. The structure is 265 ft (80.8 m) long and 167 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesState Route 4
CrossesGrayson Creek
Location04-CC-004-12.89
RouteState Highway 4
CountyContra Costa County
StateCalifornia
Coordinates37.99558, -122.06611
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length265 ft (80.8 m)
Longest span94 ft (28.7 m)
Deck width167 ft (51 m)
Roadway width156 ft (47.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic82,600 (2019)
Projected traffic125,000 by 2042
Trucks7%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 4 over Grayson Creek built?

It was built in 2021, making it 4 years old in 2025.

What condition is State Route 4 over Grayson 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 June 2024.

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

About 82,600 vehicles per day (2019 count), of which roughly 7% are trucks.

How long is State Route 4 over Grayson Creek?

The structure is 265 ft (80.8 m) long with a longest span of 94 ft (28.7 m) and a deck 167 ft wide.

Who owns State Route 4 over Grayson Creek?

It is owned by the State Highway Agency.