US Bridges

Fountain Grove Pkw over Chanate Road

Fair

Sonoma County, California · At Chanate Road · Structure no. 20C0510L

Built
1997
28 years old
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
140 ft
1 main span
Daily traffic
2,000
2010 count
Owner
City
City or Municipal Highway Agency

About this bridge

Fountain Grove Pkw over Chanate Road is a prestressed concrete box beam or girders - multiple carrying Fountain Grove Pkw over Chanate Road in Sonoma County, California. It was built in 1997, so it is 28 years old, younger 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 2,000 vehicles a day, roughly 5% of them trucks, projected to reach 3,261 by 2046. The structure is 140 ft (42.7 m) long and 37 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesFountain Grove Pkw
CrossesChanate Road
LocationAt Chanate Road
RouteCounty Highway 0
Coordinates38.47394, -122.6874
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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length140 ft (42.7 m)
Longest span130 ft (39.6 m)
Deck width37 ft (11.4 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2010)
Projected traffic3,261 by 2046
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Fountain Grove Pkw over Chanate Road built?

It was built in 1997, making it 28 years old in 2025.

What condition is Fountain Grove Pkw over Chanate Road 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 August 2024.

How much traffic does Fountain Grove Pkw over Chanate Road carry?

About 2,000 vehicles per day (2010 count), of which roughly 5% are trucks.

How long is Fountain Grove Pkw over Chanate Road?

The structure is 140 ft (42.7 m) long with a longest span of 130 ft (39.6 m) and a deck 37 ft wide.

Who owns Fountain Grove Pkw over Chanate Road?

It is owned by the City or Municipal Highway Agency.