US Bridges

Prefumo Canyon RD over Prefumo Canyon Creek

Good

San Luis Obispo County, California · 1.8 MI SW Los Osos Vly RD · Structure no. 49C0226

Built
1969
56 years old
Condition
Good
inspected October 2024
Type
Culvert
Concrete Continuous
Length
29 ft
2 main spans
Daily traffic
300
2014 count
Owner
County
County 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 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 300 vehicles a day, roughly 2% of them trucks, projected to reach 469 by 2044. The structure is 29 ft (8.8 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
Location1.8 MI SW Los Osos Vly RD
RouteCounty Highway 0
Coordinates35.26314, -120.72461
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span14 ft (4.3 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2014)
Projected traffic469 by 2044
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

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 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 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 Prefumo Canyon RD over Prefumo Canyon Creek carry?

About 300 vehicles per day (2014 count), of which roughly 2% are trucks.

How long is Prefumo Canyon RD over Prefumo Canyon Creek?

The structure is 29 ft (8.8 m) long with a longest span of 14 ft (4.3 m) and a deck 30 ft wide.

Who owns Prefumo Canyon RD over Prefumo Canyon Creek?

It is owned by the County Highway Agency.