US Bridges

Rainsville RD over Marin Creek

Fair

Sonoma County, California · 0.5 MI W Stony Point RD · Structure no. 20C0301

Built
1950
75 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete Continuous
Length
28 ft
2 main spans
Daily traffic
3,200
2015 count
Owner
County
County Highway Agency

About this bridge

Rainsville RD over Marin Creek is a concrete continuous slab carrying Rainsville RD over Marin Creek in Sonoma County, California. It was built in 1950, so it is 75 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 1,715 by 2042. The structure is 28 ft (8.5 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesRainsville RD
CrossesMarin Creek
Location0.5 MI W Stony Point RD
RouteCounty Highway 0
CountySonoma County
StateCalifornia
Coordinates38.27059, -122.68431
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
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span13 ft (4.1 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,200 (2015)
Projected traffic1,715 by 2042
Trucks5%
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 Rainsville RD over Marin Creek built?

It was built in 1950, making it 75 years old in 2025.

What condition is Rainsville RD over Marin 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 November 2024.

How much traffic does Rainsville RD over Marin Creek carry?

About 3,200 vehicles per day (2015 count), of which roughly 5% are trucks.

How long is Rainsville RD over Marin Creek?

The structure is 28 ft (8.5 m) long with a longest span of 13 ft (4.1 m) and a deck 24 ft wide.

Who owns Rainsville RD over Marin Creek?

It is owned by the County Highway Agency.