US Bridges

Las Canoas RD over Rattlesnake Canyon

Fair

Santa Barbara County, California · 1.2 MI N/E Mission Cyn RD · Structure no. 51C0054

Built
1919
106 years old
Condition
Fair
inspected November 2023
Type
Arch - Deck
Masonry
Length
27 ft
1 main span
Daily traffic
220
2011 count
Owner
City
City or Municipal Highway Agency

About this bridge

Las Canoas RD over Rattlesnake Canyon is a masonry arch - deck carrying Las Canoas RD over Rattlesnake Canyon in Santa Barbara County, California. It was built in 1919, so it is 106 years old, older 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 220 vehicles a day, roughly 1% of them trucks, projected to reach 260 by 2041. The structure is 27 ft (8.2 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLas Canoas RD
CrossesRattlesnake Canyon
Location1.2 MI N/E Mission Cyn RD
RouteCity Street 0
CountySanta Barbara County
StateCalifornia
Coordinates34.45761, -119.69241
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
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating31.1 US tons
Inventory rating18.5 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans1
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span25 ft (7.6 m)
Deck width20 ft (6.1 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic220 (2011)
Projected traffic260 by 2041
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Las Canoas RD over Rattlesnake Canyon built?

It was built in 1919, making it 106 years old in 2025.

What condition is Las Canoas RD over Rattlesnake Canyon 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 November 2023.

How much traffic does Las Canoas RD over Rattlesnake Canyon carry?

About 220 vehicles per day (2011 count), of which roughly 1% are trucks.

How long is Las Canoas RD over Rattlesnake Canyon?

The structure is 27 ft (8.2 m) long with a longest span of 25 ft (7.6 m) and a deck 20 ft wide.

Who owns Las Canoas RD over Rattlesnake Canyon?

It is owned by the City or Municipal Highway Agency.