US Bridges

US Highway 101 NB over Citrus Fair Drive

Fair

Sonoma County, California · 04-SON-101-R51.62-CLVD · Structure no. 20 0251R

Built
1994
31 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
162 ft
1 main span
Daily traffic
6,800
2015 count
Owner
State
State Highway Agency

About this bridge

US Highway 101 NB over Citrus Fair Drive is a prestressed concrete box beam or girders - multiple carrying US Highway 101 NB over Citrus Fair Drive in Sonoma County, California. It was built in 1994, so it is 31 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 6,800 vehicles a day, projected to reach 16,760 by 2045. The structure is 162 ft (49.4 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS Highway 101 NB
CrossesCitrus Fair Drive
Location04-SON-101-R51.62-CLVD
RouteU.S. Route 101
CountySonoma County
StateCalifornia
Coordinates38.80029, -123.01291
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
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.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.6 US tons
Inventory rating42.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length162 ft (49.4 m)
Longest span159 ft (48.5 m)
Deck width42 ft (12.9 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,800 (2015)
Projected traffic16,760 by 2045
Trucks0%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 US Highway 101 NB over Citrus Fair Drive built?

It was built in 1994, making it 31 years old in 2025.

What condition is US Highway 101 NB over Citrus Fair Drive 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 May 2023.

How much traffic does US Highway 101 NB over Citrus Fair Drive carry?

About 6,800 vehicles per day (2015 count).

How long is US Highway 101 NB over Citrus Fair Drive?

The structure is 162 ft (49.4 m) long with a longest span of 159 ft (48.5 m) and a deck 42 ft wide.

Who owns US Highway 101 NB over Citrus Fair Drive?

It is owned by the State Highway Agency.