US Bridges

Spring Mountain RD over York Creek

Fair

Napa County, California · 0.3 MI West of Madrona ST · Structure no. 21C0113

Built
1903
122 years old, rebuilt 1935
Condition
Fair
inspected May 2024
Type
Arch - Deck
Masonry
Length
33 ft
1 main span
Daily traffic
1,500
2012 count
Owner
City
City or Municipal Highway Agency

About this bridge

Spring Mountain RD over York Creek is a masonry arch - deck carrying Spring Mountain RD over York Creek in Napa County, California. It was built in 1903 and reconstructed in 1935, so it is 122 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 1,500 vehicles a day, roughly 10% of them trucks, projected to reach 4,846 by 2046. The structure is 33 ft (10.1 m) long and 31 ft wide. If it were closed, the detour would be 26.1 mi (42 km).

Location

Open in Google Maps
CarriesSpring Mountain RD
CrossesYork Creek
Location0.3 MI West of Madrona ST
RouteCity Street 0
CountyNapa County
StateCalifornia
Coordinates38.50726, -122.4921
Functional classRural 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
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating26.8 US tons
Inventory rating17.9 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans1
Design loadUnknown
Structure length33 ft (10.1 m)
Longest span29 ft (8.8 m)
Deck width31 ft (9.3 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2012)
Projected traffic4,846 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.1 mi (42 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Spring Mountain RD over York Creek built?

It was built in 1903, making it 122 years old in 2025. It was reconstructed in 1935.

What condition is Spring Mountain RD over York 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 Spring Mountain RD over York Creek carry?

About 1,500 vehicles per day (2012 count), of which roughly 10% are trucks.

How long is Spring Mountain RD over York Creek?

The structure is 33 ft (10.1 m) long with a longest span of 29 ft (8.8 m) and a deck 31 ft wide.

Who owns Spring Mountain RD over York Creek?

It is owned by the City or Municipal Highway Agency.