US Bridges

Ferguson RD over Jonive Creek

Fair

Sonoma County, California · 0.15 MI N Bodega HWY · Structure no. 20C0316

Built
1962
63 years old
Condition
Fair
inspected February 2025
Type
Slab
Concrete Continuous
Length
77 ft
3 main spans
Daily traffic
1,200
2018 count
Owner
County
County Highway Agency

About this bridge

Ferguson RD over Jonive Creek is a concrete continuous slab carrying Ferguson RD over Jonive Creek in Sonoma County, California. It was built in 1962, so it is 63 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 1,200 vehicles a day, roughly 1% of them trucks, projected to reach 1,632 by 2043. The structure is 77 ft (23.5 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesFerguson RD
CrossesJonive Creek
Location0.15 MI N Bodega HWY
RouteCounty Highway 0
CountySonoma County
StateCalifornia
Coordinates38.39763, -122.86786
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating63.9 US tons
Inventory rating38.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length77 ft (23.5 m)
Longest span30 ft (9.1 m)
Deck width31 ft (9.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (2018)
Projected traffic1,632 by 2043
Trucks1%
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 Ferguson RD over Jonive Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is Ferguson RD over Jonive 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 Ferguson RD over Jonive Creek carry?

About 1,200 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Ferguson RD over Jonive Creek?

The structure is 77 ft (23.5 m) long with a longest span of 30 ft (9.1 m) and a deck 31 ft wide.

Who owns Ferguson RD over Jonive Creek?

It is owned by the County Highway Agency.