US Bridges

Old Cazadero RD over Hubert Creek

Fair

Sonoma County, California · 0.9 MI NW SH 116 · Structure no. 20C0323

Built
1955
70 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete
Length
28 ft
1 main span
Daily traffic
950
2015 count
Owner
County
County Highway Agency

About this bridge

Old Cazadero RD over Hubert Creek is a concrete slab carrying Old Cazadero RD over Hubert Creek in Sonoma County, California. It was built in 1955, so it is 70 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 950 vehicles a day, roughly 2% of them trucks, projected to reach 1,085 by 2046. The structure is 28 ft (8.5 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesOld Cazadero RD
CrossesHubert Creek
Location0.9 MI NW SH 116
RouteCounty Highway 0
CountySonoma County
StateCalifornia
Coordinates38.50072, -123.02347
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 protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating110 US tons
Inventory rating68.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span28 ft (8.4 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic950 (2015)
Projected traffic1,085 by 2046
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Old Cazadero RD over Hubert Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is Old Cazadero RD over Hubert 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 June 2024.

How much traffic does Old Cazadero RD over Hubert Creek carry?

About 950 vehicles per day (2015 count), of which roughly 2% are trucks.

How long is Old Cazadero RD over Hubert Creek?

The structure is 28 ft (8.5 m) long with a longest span of 28 ft (8.4 m) and a deck 30 ft wide.

Who owns Old Cazadero RD over Hubert Creek?

It is owned by the County Highway Agency.