US Bridges

Bodega HWY over Salmon Creek

Fair

Sonoma County, California · 0.9 MI from SR 1 · Structure no. 20C0078

Built
1962
63 years old
Condition
Fair
inspected October 2023
Type
Slab
Concrete Continuous
Length
92 ft
3 main spans
Daily traffic
1,400
2015 count
Owner
County
County Highway Agency

About this bridge

Bodega HWY over Salmon Creek is a concrete continuous slab carrying Bodega HWY over Salmon Creek in Sonoma County, California. It was built in 1962, so it is 63 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 1,400 vehicles a day, roughly 4% of them trucks, projected to reach 4,271 by 2040. The structure is 92 ft (28 m) long and 41 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesBodega HWY
CrossesSalmon Creek
Location0.9 MI from SR 1
RouteCounty Highway 0
CountySonoma County
StateCalifornia
Coordinates38.34707, -122.97077
Functional classRural Major 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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.3 US tons
Inventory rating31.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length92 ft (28 m)
Longest span30 ft (9.1 m)
Deck width41 ft (12.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,400 (2015)
Projected traffic4,271 by 2040
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 HWY over Salmon Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is Bodega HWY over Salmon 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 HWY over Salmon Creek carry?

About 1,400 vehicles per day (2015 count), of which roughly 4% are trucks.

How long is Bodega HWY over Salmon Creek?

The structure is 92 ft (28 m) long with a longest span of 30 ft (9.1 m) and a deck 41 ft wide.

Who owns Bodega HWY over Salmon Creek?

It is owned by the County Highway Agency.