US Bridges

Chiles Pope Vly RD over Chiles Creek

Fair

Napa County, California · 4.0 MI N of SR 128 · Structure no. 21C0105

Built
1968
57 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete Continuous
Length
45 ft
2 main spans
Daily traffic
750
1981 count
Owner
County
County Highway Agency

About this bridge

Chiles Pope Vly RD over Chiles Creek is a concrete continuous culvert carrying Chiles Pope Vly RD over Chiles Creek in Napa County, California. It was built in 1968, so it is 57 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 750 vehicles a day, roughly 10% of them trucks, projected to reach 1,211 by 2040. The structure is 45 ft (13.7 m) long and 45 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

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CarriesChiles Pope Vly RD
CrossesChiles Creek
Location4.0 MI N of SR 128
RouteCounty Highway 0
CountyNapa County
StateCalifornia
Coordinates38.53669, -122.33752
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length45 ft (13.7 m)
Longest span22 ft (6.6 m)
Deck width45 ft (13.7 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic750 (1981)
Projected traffic1,211 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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 Chiles Pope Vly RD over Chiles Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is Chiles Pope Vly RD over Chiles 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 2023.

How much traffic does Chiles Pope Vly RD over Chiles Creek carry?

About 750 vehicles per day (1981 count), of which roughly 10% are trucks.

How long is Chiles Pope Vly RD over Chiles Creek?

The structure is 45 ft (13.7 m) long with a longest span of 22 ft (6.6 m) and a deck 45 ft wide.

Who owns Chiles Pope Vly RD over Chiles Creek?

It is owned by the County Highway Agency.