US Bridges

Williams Creek RD over Williams Creek

Fair

Humboldt County, California · 0.1 MI S of Grizzly Bluff · Structure no. 04C0257

Built
2016
9 years old
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Multiple
Concrete
Length
80 ft
1 main span
Daily traffic
130
2014 count
Owner
County
County Highway Agency

About this bridge

Williams Creek RD over Williams Creek is a concrete box beam or girders - multiple carrying Williams Creek RD over Williams Creek in Humboldt County, California. It was built in 2016, so it is 9 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 130 vehicles a day, roughly 1% of them trucks, projected to reach 105 by 2041. The structure is 80 ft (24.3 m) long and 34 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesWilliams Creek RD
CrossesWilliams Creek
Location0.1 MI S of Grizzly Bluff
RouteCounty Highway 0
Coordinates40.56953, -124.24926
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length80 ft (24.3 m)
Longest span76 ft (23.3 m)
Deck width34 ft (10.3 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic130 (2014)
Projected traffic105 by 2041
Trucks1%
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 Williams Creek RD over Williams Creek built?

It was built in 2016, making it 9 years old in 2025.

What condition is Williams Creek RD over Williams 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 2024.

How much traffic does Williams Creek RD over Williams Creek carry?

About 130 vehicles per day (2014 count), of which roughly 1% are trucks.

How long is Williams Creek RD over Williams Creek?

The structure is 80 ft (24.3 m) long with a longest span of 76 ft (23.3 m) and a deck 34 ft wide.

Who owns Williams Creek RD over Williams Creek?

It is owned by the County Highway Agency.