US Bridges

Valleyview ST over Sulphur Creek

Good

Napa County, California · 0.1 MI N Grayson Ave · Structure no. 21C0112

Built
1981
44 years old
Condition
Good
inspected August 2023
Type
Arch - Deck
Aluminum, Wrought Iron, or Cast Iron
Length
54 ft
3 main spans
Daily traffic
1,000
1982 count
Owner
City
City or Municipal Highway Agency

About this bridge

Valleyview ST over Sulphur Creek is a aluminum, wrought iron, or cast iron arch - deck carrying Valleyview ST over Sulphur Creek in Napa County, California. It was built in 1981, so it is 44 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,000 vehicles a day, roughly 10% of them trucks, projected to reach 2,726 by 2041. The structure is 54 ft (16.5 m) long and 41 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesValleyview ST
CrossesSulphur Creek
Location0.1 MI N Grayson Ave
RouteCity Street 0
Coordinates38.49447, -122.46998
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeArch - Deck
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans3
Design loadUnknown
Structure length54 ft (16.5 m)
Longest span18 ft (5.5 m)
Deck width41 ft (12.6 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (1982)
Projected traffic2,726 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 Valleyview ST over Sulphur Creek built?

It was built in 1981, making it 44 years old in 2025.

What condition is Valleyview ST over Sulphur Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does Valleyview ST over Sulphur Creek carry?

About 1,000 vehicles per day (1982 count), of which roughly 10% are trucks.

How long is Valleyview ST over Sulphur Creek?

The structure is 54 ft (16.5 m) long with a longest span of 18 ft (5.5 m) and a deck 41 ft wide.

Who owns Valleyview ST over Sulphur Creek?

It is owned by the City or Municipal Highway Agency.