US Bridges

Prefumo Canyon RD over Prefumo Canyon Creek

Fair

San Luis Obispo County, California · 0.9 MI SW Los Osos Vly RD · Structure no. 49C0223

Built
1969
56 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete Continuous
Length
95 ft
3 main spans
Daily traffic
300
2015 count
Owner
City
City or Municipal Highway Agency

About this bridge

Prefumo Canyon RD over Prefumo Canyon Creek is a concrete continuous culvert carrying Prefumo Canyon RD over Prefumo Canyon Creek in San Luis Obispo County, California. It was built in 1969, so it is 56 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 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 300 vehicles a day, roughly 2% of them trucks, projected to reach 480 by 2045. The structure is 95 ft (28.9 m) long and 30 ft wide. If it were closed, the detour would be 60.3 mi (97 km).

CarriesPrefumo Canyon RD
CrossesPrefumo Canyon Creek
Location0.9 MI SW Los Osos Vly RD
RouteCounty Highway 0
Coordinates35.26238, -120.71155
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length95 ft (28.9 m)
Longest span19 ft (5.9 m)
Deck width30 ft (9.2 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2015)
Projected traffic480 by 2045
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed60.3 mi (97 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 Prefumo Canyon RD over Prefumo Canyon Creek built?

It was built in 1969, making it 56 years old in 2025.

What condition is Prefumo Canyon RD over Prefumo Canyon Creek 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 Prefumo Canyon RD over Prefumo Canyon Creek carry?

About 300 vehicles per day (2015 count), of which roughly 2% are trucks.

How long is Prefumo Canyon RD over Prefumo Canyon Creek?

The structure is 95 ft (28.9 m) long with a longest span of 19 ft (5.9 m) and a deck 30 ft wide.

Who owns Prefumo Canyon RD over Prefumo Canyon Creek?

It is owned by the City or Municipal Highway Agency.