US Bridges

S101-E&W12 Connctr over Santa Rosa Creek

Fair

Sonoma County, California · 04-SON-101-19.98-SRO · Structure no. 20 0276F

Built
2009
16 years old
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
174 ft
1 main span
Daily traffic
40,000
2016 count
Owner
State
State Highway Agency

About this bridge

S101-E&W12 Connctr over Santa Rosa Creek is a prestressed concrete box beam or girders - multiple carrying S101-E&W12 Connctr over Santa Rosa Creek in Sonoma County, California. It was built in 2009, so it is 16 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 40,000 vehicles a day, roughly 6% of them trucks, projected to reach 47,147 by 2046. The structure is 174 ft (53.1 m) long and 36 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesS101-E&W12 Connctr
CrossesSanta Rosa Creek
Location04-SON-101-19.98-SRO
RouteU.S. Route 101
CountySonoma County
StateCalifornia
Coordinates38.43544, -122.71736
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length174 ft (53.1 m)
Longest span174 ft (53.1 m)
Deck width36 ft (11 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40,000 (2016)
Projected traffic47,147 by 2046
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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 S101-E&W12 Connctr over Santa Rosa Creek built?

It was built in 2009, making it 16 years old in 2025.

What condition is S101-E&W12 Connctr over Santa Rosa Creek 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 August 2024.

How much traffic does S101-E&W12 Connctr over Santa Rosa Creek carry?

About 40,000 vehicles per day (2016 count), of which roughly 6% are trucks.

How long is S101-E&W12 Connctr over Santa Rosa Creek?

The structure is 174 ft (53.1 m) long with a longest span of 174 ft (53.1 m) and a deck 36 ft wide.

Who owns S101-E&W12 Connctr over Santa Rosa Creek?

It is owned by the State Highway Agency.