US Bridges

Clark Avenue over Colusa Drain

Fair

Colusa County, California · 1.5 MI S of Norman RD · Structure no. 15C0025

Built
1982
43 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete Continuous
Length
67 ft
2 main spans
Daily traffic
15
2014 count
Owner
County
County Highway Agency

About this bridge

Clark Avenue over Colusa Drain is a concrete continuous slab carrying Clark Avenue over Colusa Drain in Colusa County, California. It was built in 1982, so it is 43 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 15 vehicles a day, roughly 10% of them trucks, projected to reach 55 by 2045. The structure is 67 ft (20.4 m) long and 25 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesClark Avenue
CrossesColusa Drain
Location1.5 MI S of Norman RD
RouteCounty Highway 0
CountyColusa County
StateCalifornia
Coordinates39.38659, -122.06379
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.8 US tons
Inventory rating55 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length67 ft (20.4 m)
Longest span33 ft (10.1 m)
Deck width25 ft (7.5 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2014)
Projected traffic55 by 2045
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Clark Avenue over Colusa Drain built?

It was built in 1982, making it 43 years old in 2025.

What condition is Clark Avenue over Colusa Drain 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 Clark Avenue over Colusa Drain carry?

About 15 vehicles per day (2014 count), of which roughly 10% are trucks.

How long is Clark Avenue over Colusa Drain?

The structure is 67 ft (20.4 m) long with a longest span of 33 ft (10.1 m) and a deck 25 ft wide.

Who owns Clark Avenue over Colusa Drain?

It is owned by the County Highway Agency.