US Bridges

CO RD 89 over Cottonwood Slough

Fair

Yolo County, California · 0.1 MI S of CR 23 · Structure no. 22C0031

Built
1993
32 years old
Condition
Fair
inspected October 2023
Type
Slab
Concrete Continuous
Length
55 ft
2 main spans
Daily traffic
1,500
2010 count
Owner
County
County Highway Agency

About this bridge

CO RD 89 over Cottonwood Slough is a concrete continuous slab carrying CO RD 89 over Cottonwood Slough in Yolo County, California. It was built in 1993, so it is 32 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 1,500 vehicles a day, roughly 5% of them trucks, projected to reach 3,218 by 2043. The structure is 55 ft (16.8 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCO RD 89
CrossesCottonwood Slough
Location0.1 MI S of CR 23
RouteCounty Highway 0
Coordinates38.66212, -121.97082
Functional classRural Minor 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
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length55 ft (16.8 m)
Longest span26 ft (7.9 m)
Deck width37 ft (11.4 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2010)
Projected traffic3,218 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 CO RD 89 over Cottonwood Slough built?

It was built in 1993, making it 32 years old in 2025.

What condition is CO RD 89 over Cottonwood Slough 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 CO RD 89 over Cottonwood Slough carry?

About 1,500 vehicles per day (2010 count), of which roughly 5% are trucks.

How long is CO RD 89 over Cottonwood Slough?

The structure is 55 ft (16.8 m) long with a longest span of 26 ft (7.9 m) and a deck 37 ft wide.

Who owns CO RD 89 over Cottonwood Slough?

It is owned by the County Highway Agency.