US Bridges

Mattole RD over Domingo Creek

FairPosted for load

Humboldt County, California · 21.2 MI N/O Honeydew · Structure no. 04C0168

Built
1926
99 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete
Length
32 ft
1 main span
Daily traffic
183
2011 count
Owner
County
County Highway Agency

About this bridge

Mattole RD over Domingo Creek is a concrete tee beam carrying Mattole RD over Domingo Creek in Humboldt County, California. It was built in 1926, so it is 99 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 183 vehicles a day, roughly 3% of them trucks, projected to reach 327 by 2042. The structure is 32 ft (9.8 m) long and 21 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesMattole RD
CrossesDomingo Creek
Location21.2 MI N/O Honeydew
RouteCounty Highway 0
CountyHumboldt County
StateCalifornia
Coordinates40.36888, -124.36215
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.
Superstructure7 GoodSome minor problems.
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 inspectionMarch 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26.1 US tons
Inventory rating15.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width21 ft (6.3 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic183 (2011)
Projected traffic327 by 2042
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 Mattole RD over Domingo Creek built?

It was built in 1926, making it 99 years old in 2025.

What condition is Mattole RD over Domingo 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 March 2024.

How much traffic does Mattole RD over Domingo Creek carry?

About 183 vehicles per day (2011 count), of which roughly 3% are trucks.

How long is Mattole RD over Domingo Creek?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 21 ft wide.

Who owns Mattole RD over Domingo Creek?

It is owned by the County Highway Agency.