US Bridges

Chezem RD over Redwood Creek

FairPosted for load

Humboldt County, California · 1.5 MI E Highway 299 · Structure no. 04C0121

Built
1916
109 years old
Condition
Fair
inspected October 2023
Type
Truss - Thru
Steel
Length
124 ft
1 main span
Daily traffic
78
2009 count
Owner
County
County Highway Agency

About this bridge

Chezem RD over Redwood Creek is a steel truss - thru carrying Chezem RD over Redwood Creek in Humboldt County, California. It was built in 1916, so it is 109 years old, older 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. Its operating status is: posted for load restriction.

It carries about 78 vehicles a day, roughly 2% of them trucks, projected to reach 110 by 2041. The structure is 124 ft (37.8 m) long and 18 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesChezem RD
CrossesRedwood Creek
Location1.5 MI E Highway 299
RouteCounty Highway 0
CountyHumboldt County
StateCalifornia
Coordinates40.91183, -123.81306
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating10.7 US tons
Inventory rating6.4 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length124 ft (37.8 m)
Longest span120 ft (36.6 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deck16 ft (4.9 m)

Traffic and service

Average daily traffic78 (2009)
Projected traffic110 by 2041
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Chezem RD over Redwood Creek built?

It was built in 1916, making it 109 years old in 2025.

What condition is Chezem RD over Redwood 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 Chezem RD over Redwood Creek carry?

About 78 vehicles per day (2009 count), of which roughly 2% are trucks.

How long is Chezem RD over Redwood Creek?

The structure is 124 ft (37.8 m) long with a longest span of 120 ft (36.6 m) and a deck 18 ft wide.

Who owns Chezem RD over Redwood Creek?

It is owned by the County Highway Agency.