US Bridges

Tapo Canyon RD over Arroyo Simi

Fair

Ventura County, California · 0.1 MI S Royal Ave · Structure no. 52C0235

Built
1982
43 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
135 ft
1 main span
Daily traffic
1,500
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Tapo Canyon RD over Arroyo Simi is a prestressed concrete box beam or girders - multiple carrying Tapo Canyon RD over Arroyo Simi in Ventura County, California. It was built in 1982, so it is 43 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 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 1,500 vehicles a day, roughly 1% of them trucks, projected to reach 5,255 by 2044. The structure is 135 ft (41.1 m) long and 51 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesTapo Canyon RD
CrossesArroyo Simi
Location0.1 MI S Royal Ave
RouteCity Street 0
CountyVentura County
StateCalifornia
Coordinates34.26713, -118.71647
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.3 US tons
Inventory rating45.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length135 ft (41.1 m)
Longest span132 ft (40.2 m)
Deck width51 ft (15.5 m)
Roadway width42 ft (12.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2022)
Projected traffic5,255 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

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 Tapo Canyon RD over Arroyo Simi built?

It was built in 1982, making it 43 years old in 2025.

What condition is Tapo Canyon RD 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 October 2024.

How much traffic does Tapo Canyon RD over Arroyo Simi carry?

About 1,500 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Tapo Canyon RD over Arroyo Simi?

The structure is 135 ft (41.1 m) long with a longest span of 132 ft (40.2 m) and a deck 51 ft wide.

Who owns Tapo Canyon RD over Arroyo Simi?

It is owned by the City or Municipal Highway Agency.