US Bridges

State Route 1 over Pico Creek

Fair

San Luis Obispo County, California · 05-SLO-001-54.80 · Structure no. 49 0239

Built
1997
28 years old
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
745 ft
5 main spans
Daily traffic
5,300
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 1 over Pico Creek is a prestressed concrete continuous box beam or girders - multiple carrying State Route 1 over Pico Creek in San Luis Obispo County, California. It was built in 1997, so it is 28 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 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 5,300 vehicles a day, roughly 2% of them trucks, projected to reach 7,133 by 2045. The structure is 745 ft (227 m) long and 43 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesState Route 1
CrossesPico Creek
Location05-SLO-001-54.80
RouteState Highway 1
CountySan Luis Obispo County
StateCalifornia
Coordinates35.61556, -121.147
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length745 ft (227 m)
Longest span164 ft (50 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,300 (2009)
Projected traffic7,133 by 2045
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 State Route 1 over Pico Creek built?

It was built in 1997, making it 28 years old in 2025.

What condition is State Route 1 over Pico 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 September 2023.

How much traffic does State Route 1 over Pico Creek carry?

About 5,300 vehicles per day (2009 count), of which roughly 2% are trucks.

How long is State Route 1 over Pico Creek?

The structure is 745 ft (227 m) long with a longest span of 164 ft (50 m) and a deck 43 ft wide.

Who owns State Route 1 over Pico Creek?

It is owned by the State Highway Agency.