US Bridges

US Highway 101 NB over San Jon Crk & San Jon RD

Fair

Ventura County, California · 07-VEN-101-29.55-VEN · Structure no. 52 0163R

Built
1961
64 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Concrete Continuous
Length
246 ft
6 main spans
Daily traffic
66,000
2018 count
Owner
State
State Highway Agency

About this bridge

US Highway 101 NB over San Jon Crk & San Jon RD is a concrete continuous tee beam carrying US Highway 101 NB over San Jon Crk & San Jon RD in Ventura County, California. It was built in 1961, so it is 64 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 66,000 vehicles a day, roughly 8% of them trucks, projected to reach 98,340 by 2046. The structure is 246 ft (75 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS Highway 101 NB
CrossesSan Jon Crk & San Jon RD
Location07-VEN-101-29.55-VEN
RouteU.S. Route 101
Coordinates34.27325, -119.28412
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating43.5 US tons
Inventory rating33.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length246 ft (75 m)
Longest span48 ft (14.6 m)
Deck width52 ft (15.7 m)
Roadway width49 ft (14.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic66,000 (2018)
Projected traffic98,340 by 2046
Trucks8%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US Highway 101 NB over San Jon Crk & San Jon RD built?

It was built in 1961, making it 64 years old in 2025.

What condition is US Highway 101 NB over San Jon Crk & San Jon RD 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 August 2024.

How much traffic does US Highway 101 NB over San Jon Crk & San Jon RD carry?

About 66,000 vehicles per day (2018 count), of which roughly 8% are trucks.

How long is US Highway 101 NB over San Jon Crk & San Jon RD?

The structure is 246 ft (75 m) long with a longest span of 48 ft (14.6 m) and a deck 52 ft wide.

Who owns US Highway 101 NB over San Jon Crk & San Jon RD?

It is owned by the State Highway Agency.