US Bridges

Davison RD over Prairie Creek

Fair

Humboldt County, California · 0.2 MI W JCT With SR 101 · Structure no. 04C0193

Built
1988
37 years old
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
101 ft
1 main span
Daily traffic
875
2009 count
Owner
County
County Highway Agency

About this bridge

Davison RD over Prairie Creek is a prestressed concrete box beam or girders - multiple carrying Davison RD over Prairie Creek in Humboldt County, California. It was built in 1988, so it is 37 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 875 vehicles a day, roughly 2% of them trucks, projected to reach 872 by 2041. The structure is 101 ft (30.9 m) long and 29 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesDavison RD
CrossesPrairie Creek
Location0.2 MI W JCT With SR 101
RouteCounty Highway 0
CountyHumboldt County
StateCalifornia
Coordinates41.32204, -124.04271
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being 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 typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length101 ft (30.9 m)
Longest span100 ft (30.5 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic875 (2009)
Projected traffic872 by 2041
Trucks2%
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 Davison RD over Prairie Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is Davison RD over Prairie 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 October 2023.

How much traffic does Davison RD over Prairie Creek carry?

About 875 vehicles per day (2009 count), of which roughly 2% are trucks.

How long is Davison RD over Prairie Creek?

The structure is 101 ft (30.9 m) long with a longest span of 100 ft (30.5 m) and a deck 29 ft wide.

Who owns Davison RD over Prairie Creek?

It is owned by the County Highway Agency.