US Bridges

Prefumo Canyon RD over Prefumo Canyon Creek

Fair

San Luis Obispo County, California · 2.45 MI W Los Osos Vly RD · Structure no. 49C0228

Built
1974
51 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete
Length
38 ft
1 main span
Daily traffic
300
2010 count
Owner
County
County Highway Agency

About this bridge

Prefumo Canyon RD over Prefumo Canyon Creek is a concrete slab carrying Prefumo Canyon RD over Prefumo Canyon Creek in San Luis Obispo County, California. It was built in 1974, so it is 51 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 300 vehicles a day, roughly 2% of them trucks, projected to reach 482 by 2045. The structure is 38 ft (11.6 m) long and 29 ft wide. If it were closed, the detour would be 18 mi (29 km).

CarriesPrefumo Canyon RD
CrossesPrefumo Canyon Creek
Location2.45 MI W Los Osos Vly RD
RouteCounty Highway 0
Coordinates35.26559, -120.73309
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 48 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating70 US tons
Inventory rating41.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span33 ft (10.2 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2010)
Projected traffic482 by 2045
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 1974, making it 51 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 July 2023.

How much traffic does Prefumo Canyon RD over Prefumo Canyon Creek carry?

About 300 vehicles per day (2010 count), of which roughly 2% are trucks.

How long is Prefumo Canyon RD over Prefumo Canyon Creek?

The structure is 38 ft (11.6 m) long with a longest span of 33 ft (10.2 m) and a deck 29 ft wide.

Who owns Prefumo Canyon RD over Prefumo Canyon Creek?

It is owned by the County Highway Agency.