US Bridges

State Route 41 over Atascadero Creek

Fair

San Luis Obispo County, California · 05-SLO-041-13.18-ATAS · Structure no. 49 0050

Built
1990
35 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
110 ft
1 main span
Daily traffic
9,700
2019 count
Owner
State
State Highway Agency

About this bridge

State Route 41 over Atascadero Creek is a prestressed concrete box beam or girders - multiple carrying State Route 41 over Atascadero Creek in San Luis Obispo County, California. It was built in 1990, so it is 35 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 9,700 vehicles a day, projected to reach 10,311 by 2042. The structure is 110 ft (33.5 m) long and 44 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesState Route 41
CrossesAtascadero Creek
Location05-SLO-041-13.18-ATAS
RouteState Highway 41
CountySan Luis Obispo County
StateCalifornia
Coordinates35.45621, -120.68963
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable 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
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length110 ft (33.5 m)
Longest span108 ft (32.9 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,700 (2019)
Projected traffic10,311 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was State Route 41 over Atascadero Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is State Route 41 over Atascadero 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 2024.

How much traffic does State Route 41 over Atascadero Creek carry?

About 9,700 vehicles per day (2019 count).

How long is State Route 41 over Atascadero Creek?

The structure is 110 ft (33.5 m) long with a longest span of 108 ft (32.9 m) and a deck 44 ft wide.

Who owns State Route 41 over Atascadero Creek?

It is owned by the State Highway Agency.