US Bridges

Dalby RD over Yankee Slough

Good

Placer County, California · Just West of Dowd RD · Structure no. 19C0130

Built
1925
100 years old
Condition
Good
inspected April 2023
Type
Slab
Concrete
Length
26 ft
1 main span
Daily traffic
760
2024 count
Owner
County
County Highway Agency

About this bridge

Dalby RD over Yankee Slough is a concrete slab carrying Dalby RD over Yankee Slough in Placer County, California. It was built in 1925, so it is 100 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. Its operating status is: open, would be posted or closed except for temporary shoring.

It carries about 760 vehicles a day, roughly 3% of them trucks, projected to reach 4,996 by 2045. The structure is 26 ft (7.9 m) long and 20 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesDalby RD
CrossesYankee Slough
LocationJust West of Dowd RD
RouteCounty Highway 0
Coordinates38.96276, -121.37916
Functional classRural Local

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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, would be posted or closed except for temporary shoring
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span24 ft (7.3 m)
Deck width20 ft (6.1 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic760 (2024)
Projected traffic4,996 by 2045
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Dalby RD over Yankee Slough built?

It was built in 1925, making it 100 years old in 2025.

What condition is Dalby RD over Yankee Slough 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 April 2023.

How much traffic does Dalby RD over Yankee Slough carry?

About 760 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is Dalby RD over Yankee Slough?

The structure is 26 ft (7.9 m) long with a longest span of 24 ft (7.3 m) and a deck 20 ft wide.

Who owns Dalby RD over Yankee Slough?

It is owned by the County Highway Agency.