US Bridges

Eddy Road over Clarks Ditch

Fair

Colusa County, California · 1.9 MI E of I-5 · Structure no. 15C0099

Built
1976
49 years old
Condition
Fair
inspected October 2023
Type
Slab
Concrete
Length
35 ft
1 main span
Daily traffic
244
2014 count
Owner
County
County Highway Agency

About this bridge

Eddy Road over Clarks Ditch is a concrete slab carrying Eddy Road over Clarks Ditch in Colusa County, California. It was built in 1976, so it is 49 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 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 244 vehicles a day, roughly 10% of them trucks, projected to reach 914 by 2042. The structure is 35 ft (10.8 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesEddy Road
CrossesClarks Ditch
Location1.9 MI E of I-5
RouteCounty Highway 0
CountyColusa County
StateCalifornia
Coordinates38.96212, -121.99387
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.8 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length35 ft (10.8 m)
Longest span34 ft (10.4 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic244 (2014)
Projected traffic914 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Eddy Road over Clarks Ditch built?

It was built in 1976, making it 49 years old in 2025.

What condition is Eddy Road over Clarks Ditch 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 Eddy Road over Clarks Ditch carry?

About 244 vehicles per day (2014 count), of which roughly 10% are trucks.

How long is Eddy Road over Clarks Ditch?

The structure is 35 ft (10.8 m) long with a longest span of 34 ft (10.4 m) and a deck 29 ft wide.

Who owns Eddy Road over Clarks Ditch?

It is owned by the County Highway Agency.