US Bridges

Stow Avenue over Arroyo Simi

Fair

Ventura County, California · 0.3 MI S Los Angeles St. · Structure no. 52C0300

Built
2009
16 years old
Condition
Fair
inspected March 2022
Type
Culvert
Concrete
Length
54 ft
2 main spans
Daily traffic
2,100
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Stow Avenue over Arroyo Simi is a concrete culvert carrying Stow Avenue over Arroyo Simi in Ventura County, California. It was built in 2009, so it is 16 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 2,100 vehicles a day, roughly 1% of them trucks, projected to reach 2,598 by 2040. The structure is 54 ft (16.4 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesStow Avenue
CrossesArroyo Simi
Location0.3 MI S Los Angeles St.
RouteCity Street 0
CountyVentura County
StateCalifornia
Coordinates34.26823, -118.68266
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 protection9 ExcellentNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length54 ft (16.4 m)
Longest span26 ft (8 m)
Deck width56 ft (17.1 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,100 (2019)
Projected traffic2,598 by 2040
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Stow Avenue over Arroyo Simi built?

It was built in 2009, making it 16 years old in 2025.

What condition is Stow Avenue over Arroyo Simi 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 March 2022.

How much traffic does Stow Avenue over Arroyo Simi carry?

About 2,100 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is Stow Avenue over Arroyo Simi?

The structure is 54 ft (16.4 m) long with a longest span of 26 ft (8 m) and a deck 56 ft wide.

Who owns Stow Avenue over Arroyo Simi?

It is owned by the City or Municipal Highway Agency.