US Bridges

Abel Road over Colusa Trough

Fair

Colusa County, California · 0.7 MI E of Ohm RD · Structure no. 15C0018

Built
1966
59 years old
Condition
Fair
inspected December 2024
Type
Slab
Concrete Continuous
Length
145 ft
5 main spans
Daily traffic
83
2015 count
Owner
County
County Highway Agency

About this bridge

Abel Road over Colusa Trough is a concrete continuous slab carrying Abel Road over Colusa Trough in Colusa County, California. It was built in 1966, so it is 59 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.

It carries about 83 vehicles a day, roughly 10% of them trucks, projected to reach 169 by 2042. The structure is 145 ft (44.2 m) long and 29 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesAbel Road
CrossesColusa Trough
Location0.7 MI E of Ohm RD
RouteCounty Highway 0
CountyColusa County
StateCalifornia
Coordinates39.14458, -122.02743
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.6 US tons
Inventory rating38.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length145 ft (44.2 m)
Longest span32 ft (9.8 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic83 (2015)
Projected traffic169 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 Abel Road over Colusa Trough built?

It was built in 1966, making it 59 years old in 2025.

What condition is Abel Road over Colusa Trough 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 December 2024.

How much traffic does Abel Road over Colusa Trough carry?

About 83 vehicles per day (2015 count), of which roughly 10% are trucks.

How long is Abel Road over Colusa Trough?

The structure is 145 ft (44.2 m) long with a longest span of 32 ft (9.8 m) and a deck 29 ft wide.

Who owns Abel Road over Colusa Trough?

It is owned by the County Highway Agency.