US Bridges

Bancroft RD over Walnut Creek

Good

Contra Costa County, California · 0.1 MI N David ST · Structure no. 28C0052

Built
1958
67 years old
Condition
Good
inspected January 2025
Type
Tee Beam
Prestressed Concrete
Length
102 ft
1 main span
Daily traffic
19,300
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Bancroft RD over Walnut Creek is a prestressed concrete tee beam carrying Bancroft RD over Walnut 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 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 19,300 vehicles a day, roughly 5% of them trucks, projected to reach 24,566 by 2047. The structure is 102 ft (31.2 m) long and 38 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesBancroft RD
CrossesWalnut Creek
Location0.1 MI N David ST
RouteCity Street 0
Coordinates37.9352, -122.04783
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 inspectionJanuary 2025
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating36.8 US tons
Inventory rating22.2 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length102 ft (31.2 m)
Longest span99 ft (30.1 m)
Deck width38 ft (11.7 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,300 (2021)
Projected traffic24,566 by 2047
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 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 Bancroft RD over Walnut Creek built?

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

What condition is Bancroft RD over Walnut 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 January 2025.

How much traffic does Bancroft RD over Walnut Creek carry?

About 19,300 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Bancroft RD over Walnut Creek?

The structure is 102 ft (31.2 m) long with a longest span of 99 ft (30.1 m) and a deck 38 ft wide.

Who owns Bancroft RD over Walnut Creek?

It is owned by the City or Municipal Highway Agency.