US Bridges

Oak Road over Arroyo Simi

Good

Ventura County, California · 0.2 MI S/Los Angeles Ave. · Structure no. 52C0298

Built
1970
55 years old
Condition
Good
inspected July 2022
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
100
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Oak Road over Arroyo Simi is a concrete culvert carrying Oak Road over Arroyo Simi in Ventura County, California. It was built in 1970, so it is 55 years old, older 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 100 vehicles a day, roughly 1% of them trucks, projected to reach 122 by 2042. The structure is 24 ft (7.2 m) long and 30 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesOak Road
CrossesArroyo Simi
Location0.2 MI S/Los Angeles Ave.
RouteCity Street 0
CountyVentura County
StateCalifornia
Coordinates34.2686, -118.6762
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection9 ExcellentNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length24 ft (7.2 m)
Longest span22 ft (6.7 m)
Deck width30 ft (9.1 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic122 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 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 Oak Road over Arroyo Simi built?

It was built in 1970, making it 55 years old in 2025.

What condition is Oak Road over Arroyo Simi 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 July 2022.

How much traffic does Oak Road over Arroyo Simi carry?

About 100 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Oak Road over Arroyo Simi?

The structure is 24 ft (7.2 m) long with a longest span of 22 ft (6.7 m) and a deck 30 ft wide.

Who owns Oak Road over Arroyo Simi?

It is owned by the City or Municipal Highway Agency.