US Bridges

West Riego Road over State Route 99

Good

Sutter County, California · 03-SUT-099-0.98 · Structure no. 18 0050

Built
2014
11 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
295 ft
2 main spans
Daily traffic
5,000
2019 count
Owner
State
State Highway Agency

About this bridge

West Riego Road over State Route 99 is a prestressed concrete continuous stringer/multi-beam or girder carrying West Riego Road over State Route 99 in Sutter County, California. It was built in 2014, so it is 11 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,000 vehicles a day, roughly 10% of them trucks, projected to reach 6,265 by 2044. The structure is 295 ft (89.9 m) long and 156 ft wide. If it were closed, the detour would be 9.3 mi (15 km).

CarriesWest Riego Road
CrossesState Route 99
Location03-SUT-099-0.98
RouteCounty Highway 0
Coordinates38.75015, -121.54099
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length295 ft (89.9 m)
Longest span153 ft (46.5 m)
Deck width156 ft (47.7 m)
Roadway width144 ft (43.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2019)
Projected traffic6,265 by 2044
Trucks10%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed9.3 mi (15 km)
TollOn a free road
National Highway SystemNo

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 West Riego Road over State Route 99 built?

It was built in 2014, making it 11 years old in 2025.

What condition is West Riego Road over State Route 99 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does West Riego Road over State Route 99 carry?

About 5,000 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is West Riego Road over State Route 99?

The structure is 295 ft (89.9 m) long with a longest span of 153 ft (46.5 m) and a deck 156 ft wide.

Who owns West Riego Road over State Route 99?

It is owned by the State Highway Agency.