US Bridges

Walker Road over Little Humbug Creek

Good

Siskiyou County, California · 1.5 MI E Walker RD Conn · Structure no. 02C0270

Built
2000
25 years old
Condition
Good
inspected July 2024
Type
Slab
Prestressed Concrete
Length
33 ft
1 main span
Daily traffic
68
2011 count
Owner
County
County Highway Agency

About this bridge

Walker Road over Little Humbug Creek is a prestressed concrete slab carrying Walker Road over Little Humbug Creek in Siskiyou County, California. It was built in 2000, so it is 25 years old, younger 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 68 vehicles a day, roughly 5% of them trucks, projected to reach 92 by 2042. The structure is 33 ft (10 m) long and 20 ft wide. If it were closed, the detour would be 42.3 mi (68 km).

CarriesWalker Road
CrossesLittle Humbug Creek
Location1.5 MI E Walker RD Conn
RouteCounty Highway 0
Coordinates41.83457, -122.83926
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 protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be 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 typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length33 ft (10 m)
Longest span30 ft (9 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic68 (2011)
Projected traffic92 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed42.3 mi (68 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 Walker Road over Little Humbug Creek built?

It was built in 2000, making it 25 years old in 2025.

What condition is Walker Road over Little Humbug 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 July 2024.

How much traffic does Walker Road over Little Humbug Creek carry?

About 68 vehicles per day (2011 count), of which roughly 5% are trucks.

How long is Walker Road over Little Humbug Creek?

The structure is 33 ft (10 m) long with a longest span of 30 ft (9 m) and a deck 20 ft wide.

Who owns Walker Road over Little Humbug Creek?

It is owned by the County Highway Agency.