US Bridges

Bodega Highway over Atascadero Creek

Fair

Sonoma County, California · 9.3 MI E/O SR 1 · Structure no. 20C0130

Built
1923
102 years old
Condition
Fair
inspected October 2023
Type
Tee Beam
Concrete Continuous
Length
94 ft
4 main spans
Daily traffic
10,304
2015 count
Owner
County
County Highway Agency

About this bridge

Bodega Highway over Atascadero Creek is a concrete continuous tee beam carrying Bodega Highway over Atascadero Creek in Sonoma County, California. It was built in 1923, so it is 102 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 10,304 vehicles a day, roughly 3% of them trucks, projected to reach 12,201 by 2040. The structure is 94 ft (28.7 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesBodega Highway
CrossesAtascadero Creek
Location9.3 MI E/O SR 1
RouteCity Street 0
CountySonoma County
StateCalifornia
Coordinates38.39742, -122.84838
Functional classUrban Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.7 US tons
Inventory rating19 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length94 ft (28.7 m)
Longest span23 ft (7 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,304 (2015)
Projected traffic12,201 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Bodega Highway over Atascadero Creek built?

It was built in 1923, making it 102 years old in 2025.

What condition is Bodega Highway over Atascadero 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 October 2023.

How much traffic does Bodega Highway over Atascadero Creek carry?

About 10,304 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is Bodega Highway over Atascadero Creek?

The structure is 94 ft (28.7 m) long with a longest span of 23 ft (7 m) and a deck 27 ft wide.

Who owns Bodega Highway over Atascadero Creek?

It is owned by the County Highway Agency.