US Bridges

Elinora Drive over Grayson Creek

Fair

Contra Costa County, California · Leslie Drive · Structure no. 28C0349

Built
1958
67 years old
Condition
Fair
inspected February 2025
Type
Slab
Concrete
Length
24 ft
1 main span
Daily traffic
3,400
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Elinora Drive over Grayson Creek is a concrete slab carrying Elinora Drive over Grayson Creek in Contra Costa County, California. It was built in 1958, so it is 67 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 3,400 vehicles a day, roughly 1% of them trucks, projected to reach 6,283 by 2047. The structure is 24 ft (7.3 m) long and 41 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesElinora Drive
CrossesGrayson Creek
LocationLeslie Drive
RouteCity Street 0
CountyContra Costa County
StateCalifornia
Coordinates37.95395, -122.06751
Functional classUrban Collector

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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating33.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length24 ft (7.3 m)
Longest span20 ft (6.2 m)
Deck width41 ft (12.6 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,400 (2020)
Projected traffic6,283 by 2047
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 Elinora Drive over Grayson Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is Elinora Drive over Grayson 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 February 2025.

How much traffic does Elinora Drive over Grayson Creek carry?

About 3,400 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Elinora Drive over Grayson Creek?

The structure is 24 ft (7.3 m) long with a longest span of 20 ft (6.2 m) and a deck 41 ft wide.

Who owns Elinora Drive over Grayson Creek?

It is owned by the City or Municipal Highway Agency.