US Bridges

County Road 97 over Slough S7

Fair

Yolo County, California · 0.29 MI North of CR #15 · Structure no. 22C0138

Built
1930
95 years old
Condition
Fair
inspected January 2025
Type
Arch - Deck
Concrete Continuous
Length
45 ft
3 main spans
Daily traffic
710
2015 count
Owner
County
County Highway Agency

About this bridge

County Road 97 over Slough S7 is a concrete continuous arch - deck carrying County Road 97 over Slough S7 in Yolo County, California. It was built in 1930, so it is 95 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 710 vehicles a day, roughly 10% of them trucks, projected to reach 902 by 2047. The structure is 45 ft (13.7 m) long and 22 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCounty Road 97
CrossesSlough S7
Location0.29 MI North of CR #15
RouteCounty Highway 0
CountyYolo County
StateCalifornia
Coordinates38.76869, -121.82178
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
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating17.9 US tons

Structure

Structure typeArch - Deck
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadUnknown
Structure length45 ft (13.7 m)
Longest span14 ft (4.3 m)
Deck width22 ft (6.8 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic710 (2015)
Projected traffic902 by 2047
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 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 County Road 97 over Slough S7 built?

It was built in 1930, making it 95 years old in 2025.

What condition is County Road 97 over Slough S7 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 January 2025.

How much traffic does County Road 97 over Slough S7 carry?

About 710 vehicles per day (2015 count), of which roughly 10% are trucks.

How long is County Road 97 over Slough S7?

The structure is 45 ft (13.7 m) long with a longest span of 14 ft (4.3 m) and a deck 22 ft wide.

Who owns County Road 97 over Slough S7?

It is owned by the County Highway Agency.