US Bridges

Dry Creek RD over Dry Creek

Fair

Napa County, California · 3.5 MI S Oakville Grade · Structure no. 21C0055

Built
1930
95 years old
Condition
Fair
inspected May 2023
Type
Tee Beam
Concrete Continuous
Length
56 ft
2 main spans
Daily traffic
2,490
2005 count
Owner
County
County Highway Agency

About this bridge

Dry Creek RD over Dry Creek is a concrete continuous tee beam carrying Dry Creek RD over Dry Creek in Napa County, California. It was built in 1930, so it is 95 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 2,490 vehicles a day, roughly 10% of them trucks, projected to reach 3,863 by 2040. The structure is 56 ft (17.1 m) long and 22 ft wide. If it were closed, the detour would be 23 mi (37 km).

CarriesDry Creek RD
CrossesDry Creek
Location3.5 MI S Oakville Grade
RouteCounty Highway 0
Coordinates38.37663, -122.39209
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
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating34 US tons
Inventory rating20.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length56 ft (17.1 m)
Longest span25 ft (7.6 m)
Deck width22 ft (6.7 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,490 (2005)
Projected traffic3,863 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed23 mi (37 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 Dry Creek RD over Dry Creek built?

It was built in 1930, making it 95 years old in 2025.

What condition is Dry Creek RD over Dry 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 Dry Creek RD over Dry Creek carry?

About 2,490 vehicles per day (2005 count), of which roughly 10% are trucks.

How long is Dry Creek RD over Dry Creek?

The structure is 56 ft (17.1 m) long with a longest span of 25 ft (7.6 m) and a deck 22 ft wide.

Who owns Dry Creek RD over Dry Creek?

It is owned by the County Highway Agency.