US Bridges

Royal Avenue over Arroyo Simi

Good

Ventura County, California · 0.4 MI W Sequoia Ave · Structure no. 52C0118

Built
1968
57 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
128 ft
2 main spans
Daily traffic
16,500
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Royal Avenue over Arroyo Simi is a steel continuous stringer/multi-beam or girder carrying Royal Avenue over Arroyo Simi in Ventura County, California. It was built in 1968, so it is 57 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 16,500 vehicles a day, roughly 2% of them trucks, projected to reach 21,024 by 2044. The structure is 128 ft (39 m) long and 74 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesRoyal Avenue
CrossesArroyo Simi
Location0.4 MI W Sequoia Ave
RouteCity Street 0
Coordinates34.26374, -118.73652
Functional classUrban Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
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 evaluation7: Better than 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 alignment8: Equal to present desirable criteria
Operating rating56.8 US tons
Inventory rating34 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length128 ft (39 m)
Longest span62 ft (18.9 m)
Deck width74 ft (22.6 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,500 (2022)
Projected traffic21,024 by 2044
Trucks2%
Lanes on structure5
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 Royal Avenue over Arroyo Simi built?

It was built in 1968, making it 57 years old in 2025.

What condition is Royal Avenue 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 October 2024.

How much traffic does Royal Avenue over Arroyo Simi carry?

About 16,500 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Royal Avenue over Arroyo Simi?

The structure is 128 ft (39 m) long with a longest span of 62 ft (18.9 m) and a deck 74 ft wide.

Who owns Royal Avenue over Arroyo Simi?

It is owned by the City or Municipal Highway Agency.