US Bridges

Fair Oaks Ave over US Highway 101

Fair

San Luis Obispo County, California · 05-SLO-101-12.80-ARGD · Structure no. 49 0174

Built
1959
66 years old
Condition
Fair
inspected January 2024
Type
Slab
Prestressed Concrete Continuous
Length
126 ft
2 main spans
Daily traffic
7,000
2009 count
Owner
State
State Highway Agency

About this bridge

Fair Oaks Ave over US Highway 101 is a prestressed concrete continuous slab carrying Fair Oaks Ave over US Highway 101 in San Luis Obispo County, California. It was built in 1959, so it is 66 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 7,000 vehicles a day, roughly 8% of them trucks, projected to reach 4,532 by 2044. The structure is 126 ft (38.4 m) long and 65 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesFair Oaks Ave
CrossesUS Highway 101
Location05-SLO-101-12.80-ARGD
RouteCity Street 0Z881
CountySan Luis Obispo County
StateCalifornia
Coordinates35.11881, -120.57801
Functional classUrban 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93.3 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length126 ft (38.4 m)
Longest span62 ft (18.9 m)
Deck width65 ft (19.7 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,000 (2009)
Projected traffic4,532 by 2044
Trucks8%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Fair Oaks Ave over US Highway 101 built?

It was built in 1959, making it 66 years old in 2025.

What condition is Fair Oaks Ave over US Highway 101 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 January 2024.

How much traffic does Fair Oaks Ave over US Highway 101 carry?

About 7,000 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Fair Oaks Ave over US Highway 101?

The structure is 126 ft (38.4 m) long with a longest span of 62 ft (18.9 m) and a deck 65 ft wide.

Who owns Fair Oaks Ave over US Highway 101?

It is owned by the State Highway Agency.