US Bridges

Stethem Road over Oxnard Drainage Canal

Fair

Ventura County, California · Navbase Port Hueneme · Structure no. 1CA5135

Built
1971
54 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
500
2013 count
Owner
Federal
Navy / Marines

About this bridge

Stethem Road over Oxnard Drainage Canal is a concrete culvert carrying Stethem Road over Oxnard Drainage Canal in Ventura County, California. It was built in 1971, so it is 54 years old, younger 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 500 vehicles a day, roughly 10% of them trucks, projected to reach 600 by 2042. The structure is 22 ft (6.7 m) long and 66 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesStethem Road
CrossesOxnard Drainage Canal
LocationNavbase Port Hueneme
RouteFederal Lands Road 0
CountyVentura County
StateCalifornia
Coordinates34.15363, -119.21127
Functional classUrban Collector

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.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.1 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span10 ft (3.2 m)
Deck width66 ft (20.1 m)
Roadway width62 ft (19 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2013)
Projected traffic600 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerNavy / Marines
Maintained byNavy / Marines
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$113,000 (2023 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Stethem Road over Oxnard Drainage Canal built?

It was built in 1971, making it 54 years old in 2025.

What condition is Stethem Road over Oxnard Drainage Canal 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 2023.

How much traffic does Stethem Road over Oxnard Drainage Canal carry?

About 500 vehicles per day (2013 count), of which roughly 10% are trucks.

How long is Stethem Road over Oxnard Drainage Canal?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3.2 m) and a deck 66 ft wide.

Who owns Stethem Road over Oxnard Drainage Canal?

It is owned by the Navy / Marines.