US Bridges

U.S. Route 101 over Future Rainier Avenue

Fair

Sonoma County, California · 04-SON-101-5.58-PET · Structure no. 20 0301

Built
2022
3 years old
Condition
Fair
inspected March 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
168 ft
2 main spans
Daily traffic
103,000
2019 count
Owner
State
State Highway Agency

About this bridge

U.S. Route 101 over Future Rainier Avenue is a prestressed concrete continuous box beam or girders - multiple carrying U.S. Route 101 over Future Rainier Avenue in Sonoma County, California. It was built in 2022, so it is 3 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 6 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 103,000 vehicles a day, roughly 6% of them trucks, projected to reach 133,900 by 2042. The structure is 168 ft (51.2 m) long and 119 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesU.S. Route 101
CrossesFuture Rainier Avenue
Location04-SON-101-5.58-PET
RouteU.S. Route 101
Coordinates38.25361, -122.64033
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMarch 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 loadGreater than HL 93
Structure length168 ft (51.2 m)
Longest span86 ft (26.1 m)
Deck width119 ft (36.2 m)
Roadway width113 ft (34.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic103,000 (2019)
Projected traffic133,900 by 2042
Trucks6%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed0.6 mi (1 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was U.S. Route 101 over Future Rainier Avenue built?

It was built in 2022, making it 3 years old in 2025.

What condition is U.S. Route 101 over Future Rainier Avenue 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 March 2024.

How much traffic does U.S. Route 101 over Future Rainier Avenue carry?

About 103,000 vehicles per day (2019 count), of which roughly 6% are trucks.

How long is U.S. Route 101 over Future Rainier Avenue?

The structure is 168 ft (51.2 m) long with a longest span of 86 ft (26.1 m) and a deck 119 ft wide.

Who owns U.S. Route 101 over Future Rainier Avenue?

It is owned by the State Highway Agency.