US Bridges

Scales Road over Slate Creek

Fair

Yuba County, California · 3 MI East of LA Porte RD · Structure no. 16C0108

Built
2017
8 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
149 ft
1 main span
Daily traffic
100
2018 count
Owner
County
County Highway Agency

About this bridge

Scales Road over Slate Creek is a prestressed concrete box beam or girders - multiple carrying Scales Road over Slate Creek in Yuba County, California. It was built in 2017, so it is 8 years old, younger 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 133 by 2045. The structure is 149 ft (45.4 m) long and 22 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesScales Road
CrossesSlate Creek
Location3 MI East of LA Porte RD
RouteCounty Highway 0
CountyYuba County
StateCalifornia
Coordinates39.61196, -121.05573
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length149 ft (45.4 m)
Longest span147 ft (44.7 m)
Deck width22 ft (6.7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2018)
Projected traffic133 by 2045
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed19.9 mi (32 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Scales Road over Slate Creek built?

It was built in 2017, making it 8 years old in 2025.

What condition is Scales Road over Slate 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 July 2023.

How much traffic does Scales Road over Slate Creek carry?

About 100 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is Scales Road over Slate Creek?

The structure is 149 ft (45.4 m) long with a longest span of 147 ft (44.7 m) and a deck 22 ft wide.

Who owns Scales Road over Slate Creek?

It is owned by the County Highway Agency.