US Bridges

Vernalis Road over Lone Tree Creek

Fair

San Joaquin County, California · 0.5 MI E of S Bird Road · Structure no. 29C0481

Built
1912
113 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete Continuous
Length
23 ft
4 main spans
Daily traffic
100
2024 count
Owner
County
County Highway Agency

About this bridge

Vernalis Road over Lone Tree Creek is a concrete continuous culvert carrying Vernalis Road over Lone Tree Creek in San Joaquin County, California. It was built in 1912, so it is 113 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 100 vehicles a day, roughly 1% of them trucks, projected to reach 130 by 2044. The structure is 23 ft (6.9 m) long and 22 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesVernalis Road
CrossesLone Tree Creek
Location0.5 MI E of S Bird Road
RouteCounty Highway 0
Coordinates37.63814, -121.35303
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length23 ft (6.9 m)
Longest span6 ft (1.7 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2024)
Projected traffic130 by 2044
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed123.7 mi (199 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Vernalis Road over Lone Tree Creek built?

It was built in 1912, making it 113 years old in 2025.

What condition is Vernalis Road over Lone Tree 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 September 2024.

How much traffic does Vernalis Road over Lone Tree Creek carry?

About 100 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Vernalis Road over Lone Tree Creek?

The structure is 23 ft (6.9 m) long with a longest span of 6 ft (1.7 m) and a deck 22 ft wide.

Who owns Vernalis Road over Lone Tree Creek?

It is owned by the County Highway Agency.