US Bridges

State Route 65 over Grasshopper Slough

Fair

Yuba County, California · 03-YUB-065-1.80-WHT · Structure no. 16 0001

Built
1915
110 years old, rebuilt 1975
Condition
Fair
inspected September 2023
Type
Tee Beam
Concrete Continuous
Length
85 ft
4 main spans
Daily traffic
25,000
2010 count
Owner
State
State Highway Agency

About this bridge

State Route 65 over Grasshopper Slough is a concrete continuous tee beam carrying State Route 65 over Grasshopper Slough in Yuba County, California. It was built in 1915 and reconstructed in 1975, so it is 110 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 25,000 vehicles a day, roughly 5% of them trucks, projected to reach 39,551 by 2041. The structure is 85 ft (26 m) long and 44 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesState Route 65
CrossesGrasshopper Slough
Location03-YUB-065-1.80-WHT
RouteState Highway 65
CountyYuba County
StateCalifornia
Coordinates39.01907, -121.43905
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 inspectionSeptember 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 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 rating46.7 US tons
Inventory rating28.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length85 ft (26 m)
Longest span20 ft (6.1 m)
Deck width44 ft (13.5 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,000 (2010)
Projected traffic39,551 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 State Route 65 over Grasshopper Slough built?

It was built in 1915, making it 110 years old in 2025. It was reconstructed in 1975.

What condition is State Route 65 over Grasshopper 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 September 2023.

How much traffic does State Route 65 over Grasshopper Slough carry?

About 25,000 vehicles per day (2010 count), of which roughly 5% are trucks.

How long is State Route 65 over Grasshopper Slough?

The structure is 85 ft (26 m) long with a longest span of 20 ft (6.1 m) and a deck 44 ft wide.

Who owns State Route 65 over Grasshopper Slough?

It is owned by the State Highway Agency.