US Bridges

Crocker RD over Russian River

Fair

Sonoma County, California · 0.6 MI N/E of S.R. 101 · Structure no. 20C0002

Built
1938
87 years old
Condition
Fair
inspected July 2023
Type
Truss - Thru
Steel
Length
530 ft
3 main spans
Daily traffic
3,200
2012 count
Owner
County
County Highway Agency

About this bridge

Crocker RD over Russian River is a steel truss - thru carrying Crocker RD over Russian River in Sonoma County, California. It was built in 1938, so it is 87 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 3,200 vehicles a day, roughly 5% of them trucks, projected to reach 4,241 by 2043. The structure is 530 ft (161.5 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesCrocker RD
CrossesRussian River
Location0.6 MI N/E of S.R. 101
RouteCounty Highway 0
CountySonoma County
StateCalifornia
Coordinates38.80829, -123.00894
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
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.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating31.7 US tons
Inventory rating19 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans3 (+4 approach)
Design loadH 15
Structure length530 ft (161.5 m)
Longest span120 ft (36.6 m)
Deck width25 ft (7.7 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,200 (2012)
Projected traffic4,241 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Crocker RD over Russian River built?

It was built in 1938, making it 87 years old in 2025.

What condition is Crocker RD over Russian River 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 July 2023.

How much traffic does Crocker RD over Russian River carry?

About 3,200 vehicles per day (2012 count), of which roughly 5% are trucks.

How long is Crocker RD over Russian River?

The structure is 530 ft (161.5 m) long with a longest span of 120 ft (36.6 m) and a deck 25 ft wide.

Who owns Crocker RD over Russian River?

It is owned by the County Highway Agency.