US Bridges

Hawkinsvle Humb RD over Humbug Creek

Good

Siskiyou County, California · South Humbug Creek RD · Structure no. 02C0221

Built
1971
54 years old
Condition
Good
inspected July 2024
Type
Tee Beam
Concrete
Length
53 ft
1 main span
Daily traffic
20
2011 count
Owner
County
County Highway Agency

About this bridge

Hawkinsvle Humb RD over Humbug Creek is a concrete tee beam carrying Hawkinsvle Humb RD over Humbug 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 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 20 vehicles a day, roughly 5% of them trucks, projected to reach 29 by 2046. The structure is 53 ft (16.2 m) long and 21 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

CarriesHawkinsvle Humb RD
CrossesHumbug Creek
LocationSouth Humbug Creek RD
RouteCounty Highway 0
Coordinates41.79307, -122.69307
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59 US tons
Inventory rating45.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length53 ft (16.2 m)
Longest span52 ft (15.8 m)
Deck width21 ft (6.3 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2011)
Projected traffic29 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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 Hawkinsvle Humb RD over Humbug Creek built?

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

What condition is Hawkinsvle Humb RD over 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 Hawkinsvle Humb RD over Humbug Creek carry?

About 20 vehicles per day (2011 count), of which roughly 5% are trucks.

How long is Hawkinsvle Humb RD over Humbug Creek?

The structure is 53 ft (16.2 m) long with a longest span of 52 ft (15.8 m) and a deck 21 ft wide.

Who owns Hawkinsvle Humb RD over Humbug Creek?

It is owned by the County Highway Agency.