US Bridges

Shiveley Road over Shiveley Creek

Fair

Humboldt County, California · 1.0 MI N of Shiveley · Structure no. 04C0153

Built
1960
65 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
42 ft
1 main span
Daily traffic
58
2011 count
Owner
County
County Highway Agency

About this bridge

Shiveley Road over Shiveley Creek is a steel stringer/multi-beam or girder carrying Shiveley Road over Shiveley Creek in Humboldt County, California. It was built in 1960, so it is 65 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 5 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 58 vehicles a day, roughly 2% of them trucks, projected to reach 168 by 2046. The structure is 42 ft (12.7 m) long and 23 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesShiveley Road
CrossesShiveley Creek
Location1.0 MI N of Shiveley
RouteCounty Highway 0
CountyHumboldt County
StateCalifornia
Coordinates40.43533, -123.96431
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 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 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 rating78.3 US tons
Inventory rating46.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length42 ft (12.7 m)
Longest span40 ft (12.2 m)
Deck width23 ft (6.9 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58 (2011)
Projected traffic168 by 2046
Trucks2%
Lanes on structure2
Traffic directionTwo-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 Shiveley Road over Shiveley Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is Shiveley Road over Shiveley 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 February 2024.

How much traffic does Shiveley Road over Shiveley Creek carry?

About 58 vehicles per day (2011 count), of which roughly 2% are trucks.

How long is Shiveley Road over Shiveley Creek?

The structure is 42 ft (12.7 m) long with a longest span of 40 ft (12.2 m) and a deck 23 ft wide.

Who owns Shiveley Road over Shiveley Creek?

It is owned by the County Highway Agency.