US Bridges

Pt Ryes Petluma RD over Nicasio Creek

Good

Marin County, California · 3.47 MI E State HWY 1 · Structure no. 27C0017

Built
1960
65 years old
Condition
Good
inspected August 2023
Type
Tee Beam
Concrete Continuous
Length
133 ft
3 main spans
Daily traffic
10,000
2014 count
Owner
County
County Highway Agency

About this bridge

Pt Ryes Petluma RD over Nicasio Creek is a concrete continuous tee beam carrying Pt Ryes Petluma RD over Nicasio Creek in Marin County, California. It was built in 1960, so it is 65 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 10,000 vehicles a day, roughly 10% of them trucks, projected to reach 16,889 by 2045. The structure is 133 ft (40.5 m) long and 43 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

CarriesPt Ryes Petluma RD
CrossesNicasio Creek
Location3.47 MI E State HWY 1
RouteCounty Highway 0
Coordinates38.07133, -122.76044
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating47.8 US tons
Inventory rating36.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length133 ft (40.5 m)
Longest span52 ft (15.8 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2014)
Projected traffic16,889 by 2045
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 Pt Ryes Petluma RD over Nicasio Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is Pt Ryes Petluma RD over Nicasio Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does Pt Ryes Petluma RD over Nicasio Creek carry?

About 10,000 vehicles per day (2014 count), of which roughly 10% are trucks.

How long is Pt Ryes Petluma RD over Nicasio Creek?

The structure is 133 ft (40.5 m) long with a longest span of 52 ft (15.8 m) and a deck 43 ft wide.

Who owns Pt Ryes Petluma RD over Nicasio Creek?

It is owned by the County Highway Agency.