US Bridges

Redwood HWY over May Creek

Fair

Humboldt County, California · Prairie CR Redwood ST Pk · Structure no. 04P0016

Built
1989
36 years old
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Multiple
Concrete
Length
87 ft
1 main span
Daily traffic
5,450
2009 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

Redwood HWY over May Creek is a concrete box beam or girders - multiple carrying Redwood HWY over May Creek in Humboldt County, California. It was built in 1989, so it is 36 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 5,450 vehicles a day, roughly 19% of them trucks, projected to reach 7,094 by 2045. The structure is 87 ft (26.5 m) long and 35 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesRedwood HWY
CrossesMay Creek
LocationPrairie CR Redwood ST Pk
RouteState Lands Road 0
CountyHumboldt County
StateCalifornia
Coordinates41.34957, -124.02743
Functional classRural Major Collector

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 protection7 GoodSome minor problems.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior 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
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length87 ft (26.5 m)
Longest span85 ft (25.8 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,450 (2009)
Projected traffic7,094 by 2045
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Park, Forest, or Reservation Agency
Maintained byState Park, Forest, or Reservation 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 Redwood HWY over May Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is Redwood HWY over May 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 Redwood HWY over May Creek carry?

About 5,450 vehicles per day (2009 count), of which roughly 19% are trucks.

How long is Redwood HWY over May Creek?

The structure is 87 ft (26.5 m) long with a longest span of 85 ft (25.8 m) and a deck 35 ft wide.

Who owns Redwood HWY over May Creek?

It is owned by the State Park, Forest, or Reservation Agency.