US Bridges

San Luis Bay DR over San Luis Obispo Creek

Fair

San Luis Obispo County, California · Avila RD · Structure no. 49C0438

Built
2009
16 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
220 ft
2 main spans
Daily traffic
500
2010 count
Owner
County
County Highway Agency

About this bridge

San Luis Bay DR over San Luis Obispo Creek is a prestressed concrete continuous box beam or girders - multiple carrying San Luis Bay DR over San Luis Obispo Creek in San Luis Obispo County, California. It was built in 2009, so it is 16 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 500 vehicles a day, roughly 1% of them trucks, projected to reach 918 by 2045. The structure is 220 ft (67 m) long and 47 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesSan Luis Bay DR
CrossesSan Luis Obispo Creek
LocationAvila RD
RouteCounty Highway 0
Coordinates35.18799, -120.71894
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length220 ft (67 m)
Longest span108 ft (33 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2010)
Projected traffic918 by 2045
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 San Luis Bay DR over San Luis Obispo Creek built?

It was built in 2009, making it 16 years old in 2025.

What condition is San Luis Bay DR over San Luis Obispo 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 May 2023.

How much traffic does San Luis Bay DR over San Luis Obispo Creek carry?

About 500 vehicles per day (2010 count), of which roughly 1% are trucks.

How long is San Luis Bay DR over San Luis Obispo Creek?

The structure is 220 ft (67 m) long with a longest span of 108 ft (33 m) and a deck 47 ft wide.

Who owns San Luis Bay DR over San Luis Obispo Creek?

It is owned by the County Highway Agency.