US Bridges

N101-DEAN Crk RD over Dean Creek

Good

Humboldt County, California · 01-HUM-101-R14.31 · Structure no. 04 0006S

Built
1967
58 years old
Condition
Good
inspected September 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
243 ft
2 main spans
Daily traffic
310
1998 count
Owner
State
State Highway Agency

About this bridge

N101-DEAN Crk RD over Dean Creek is a concrete continuous box beam or girders - multiple carrying N101-DEAN Crk RD over Dean Creek in Humboldt County, California. It was built in 1967, so it is 58 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 310 vehicles a day, roughly 2% of them trucks, projected to reach 1,109 by 2046. The structure is 243 ft (74.1 m) long and 26 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesN101-DEAN Crk RD
CrossesDean Creek
Location01-HUM-101-R14.31
RouteU.S. Route 101
Coordinates40.14049, -123.80827
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.5 US tons
Inventory rating35.1 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2 (+1 approach)
Design loadHS 20
Structure length243 ft (74.1 m)
Longest span103 ft (31.4 m)
Deck width26 ft (8 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic310 (1998)
Projected traffic1,109 by 2046
Trucks2%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 N101-DEAN Crk RD over Dean Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is N101-DEAN Crk RD over Dean Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does N101-DEAN Crk RD over Dean Creek carry?

About 310 vehicles per day (1998 count), of which roughly 2% are trucks.

How long is N101-DEAN Crk RD over Dean Creek?

The structure is 243 ft (74.1 m) long with a longest span of 103 ft (31.4 m) and a deck 26 ft wide.

Who owns N101-DEAN Crk RD over Dean Creek?

It is owned by the State Highway Agency.