US Bridges

Redwood DR over Bear Gulch

Fair

Humboldt County, California · 0.2 MI N SR 101 at Grbrvl · Structure no. 04C0156

Built
2004
21 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
362 ft
2 main spans
Daily traffic
5,870
2008 count
Owner
County
County Highway Agency

About this bridge

Redwood DR over Bear Gulch is a steel continuous stringer/multi-beam or girder carrying Redwood DR over Bear Gulch in Humboldt County, California. It was built in 2004, so it is 21 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 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 5,870 vehicles a day, roughly 31% of them trucks, projected to reach 3,218 by 2045. The structure is 362 ft (110.4 m) long and 44 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesRedwood DR
CrossesBear Gulch
Location0.2 MI N SR 101 at Grbrvl
RouteCounty Highway 0
CountyHumboldt County
StateCalifornia
Coordinates40.10645, -123.79598
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating82.1 US tons
Inventory rating49.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length362 ft (110.4 m)
Longest span220 ft (67.2 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,870 (2008)
Projected traffic3,218 by 2045
Trucks31%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 Redwood DR over Bear Gulch built?

It was built in 2004, making it 21 years old in 2025.

What condition is Redwood DR over Bear Gulch 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 July 2023.

How much traffic does Redwood DR over Bear Gulch carry?

About 5,870 vehicles per day (2008 count), of which roughly 31% are trucks.

How long is Redwood DR over Bear Gulch?

The structure is 362 ft (110.4 m) long with a longest span of 220 ft (67.2 m) and a deck 44 ft wide.

Who owns Redwood DR over Bear Gulch?

It is owned by the County Highway Agency.