US Bridges

Yreka Walker RD over Humbug Creek

Fair

Siskiyou County, California · Just S of Humbug Creek RD · Structure no. 02C0172

Built
1957
68 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Concrete
Length
46 ft
1 main span
Daily traffic
56
2011 count
Owner
County
County Highway Agency

About this bridge

Yreka Walker RD over Humbug Creek is a concrete tee beam carrying Yreka Walker RD over Humbug Creek in Siskiyou County, California. It was built in 1957, so it is 68 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 56 vehicles a day, projected to reach 84 by 2046. The structure is 46 ft (14 m) long and 18 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesYreka Walker RD
CrossesHumbug Creek
LocationJust S of Humbug Creek RD
RouteCounty Highway 0
CountySiskiyou County
StateCalifornia
Coordinates41.7748, -122.72456
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating33.2 US tons
Inventory rating20 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length46 ft (14 m)
Longest span43 ft (13.1 m)
Deck width18 ft (5.6 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic56 (2011)
Projected traffic84 by 2046
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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 Yreka Walker RD over Humbug Creek built?

It was built in 1957, making it 68 years old in 2025.

What condition is Yreka Walker RD over Humbug 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 2024.

How much traffic does Yreka Walker RD over Humbug Creek carry?

About 56 vehicles per day (2011 count).

How long is Yreka Walker RD over Humbug Creek?

The structure is 46 ft (14 m) long with a longest span of 43 ft (13.1 m) and a deck 18 ft wide.

Who owns Yreka Walker RD over Humbug Creek?

It is owned by the County Highway Agency.