US Bridges

E Railroad Ave over Lichau Creek

Fair

Sonoma County, California · 0.1 MI E Petaluma Hill RD · Structure no. 20C0310

Built
1970
55 years old
Condition
Fair
inspected February 2025
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
750
2018 count
Owner
County
County Highway Agency

About this bridge

E Railroad Ave over Lichau Creek is a concrete continuous culvert carrying E Railroad Ave over Lichau Creek in Sonoma County, California. It was built in 1970, so it is 55 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 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 750 vehicles a day, roughly 5% of them trucks, projected to reach 1,291 by 2043. The structure is 23 ft (7 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesE Railroad Ave
CrossesLichau Creek
Location0.1 MI E Petaluma Hill RD
RouteCounty Highway 0
CountySonoma County
StateCalifornia
Coordinates38.31429, -122.66355
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic750 (2018)
Projected traffic1,291 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 E Railroad Ave over Lichau Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is E Railroad Ave over Lichau 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 February 2025.

How much traffic does E Railroad Ave over Lichau Creek carry?

About 750 vehicles per day (2018 count), of which roughly 5% are trucks.

How long is E Railroad Ave over Lichau Creek?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m) and a deck 34 ft wide.

Who owns E Railroad Ave over Lichau Creek?

It is owned by the County Highway Agency.