US Bridges

Pope Valley RD over Duvall Creek

Fair

Napa County, California · 5.50 MI S Lake CO Line · Structure no. 21C0036

Built
1972
53 years old
Condition
Fair
inspected May 2024
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
1,658
2014 count
Owner
County
County Highway Agency

About this bridge

Pope Valley RD over Duvall Creek is a concrete continuous culvert carrying Pope Valley RD over Duvall Creek in Napa County, California. It was built in 1972, so it is 53 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 1,658 vehicles a day, roughly 10% of them trucks, projected to reach 1,405 by 2044. The structure is 22 ft (6.8 m) long and 32 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

Location

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CarriesPope Valley RD
CrossesDuvall Creek
Location5.50 MI S Lake CO Line
RouteCounty Highway 0
CountyNapa County
StateCalifornia
Coordinates38.65074, -122.45993
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length22 ft (6.8 m)
Longest span11 ft (3.3 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,658 (2014)
Projected traffic1,405 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 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 Pope Valley RD over Duvall Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is Pope Valley RD over Duvall 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 May 2024.

How much traffic does Pope Valley RD over Duvall Creek carry?

About 1,658 vehicles per day (2014 count), of which roughly 10% are trucks.

How long is Pope Valley RD over Duvall Creek?

The structure is 22 ft (6.8 m) long with a longest span of 11 ft (3.3 m) and a deck 32 ft wide.

Who owns Pope Valley RD over Duvall Creek?

It is owned by the County Highway Agency.