US Bridges

Anderson Grade RD over Yreka Creek

Fair

Siskiyou County, California · 0.1 MI E of SR 263 · Structure no. 02C0083

Built
1971
54 years old
Condition
Fair
inspected August 2022
Type
Tee Beam
Concrete Continuous
Length
90 ft
2 main spans
Daily traffic
90
2020 count
Owner
County
County Highway Agency

About this bridge

Anderson Grade RD over Yreka Creek is a concrete continuous tee beam carrying Anderson Grade RD over Yreka Creek in Siskiyou County, California. It was built in 1971, so it is 54 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 90 vehicles a day, roughly 5% of them trucks, projected to reach 120 by 2041. The structure is 90 ft (27.4 m) long and 29 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesAnderson Grade RD
CrossesYreka Creek
Location0.1 MI E of SR 263
RouteCounty Highway 0
Coordinates41.77194, -122.60446
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 protection7 GoodSome minor problems.
Last inspectionAugust 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating80.7 US tons
Inventory rating62.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length90 ft (27.4 m)
Longest span44 ft (13.4 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic90 (2020)
Projected traffic120 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Anderson Grade RD over Yreka Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is Anderson Grade RD over Yreka 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 August 2022.

How much traffic does Anderson Grade RD over Yreka Creek carry?

About 90 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Anderson Grade RD over Yreka Creek?

The structure is 90 ft (27.4 m) long with a longest span of 44 ft (13.4 m) and a deck 29 ft wide.

Who owns Anderson Grade RD over Yreka Creek?

It is owned by the County Highway Agency.