US Bridges

State Route 41 over Estrella River

Fair

San Luis Obispo County, California · 05-SLO-041-R41.70 · Structure no. 49 0264

Built
1996
29 years old
Condition
Fair
inspected September 2022
Type
Slab
Concrete Continuous
Length
425 ft
11 main spans
Daily traffic
2,086
2018 count
Owner
State
State Highway Agency

About this bridge

State Route 41 over Estrella River is a concrete continuous slab carrying State Route 41 over Estrella River in San Luis Obispo County, California. It was built in 1996, so it is 29 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 2,086 vehicles a day, roughly 2% of them trucks, projected to reach 4,019 by 2042. The structure is 425 ft (129.4 m) long and 32 ft wide.

Location

Open in Google Maps
CarriesState Route 41
CrossesEstrella River
Location05-SLO-041-R41.70
RouteState Highway 41
CountySan Luis Obispo County
StateCalifornia
Coordinates35.65663, -120.40898
Functional classRural Local

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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans11
Design loadHS 20 + Mod
Structure length425 ft (129.4 m)
Longest span40 ft (12.2 m)
Deck width32 ft (9.7 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,086 (2018)
Projected traffic4,019 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState 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 State Route 41 over Estrella River built?

It was built in 1996, making it 29 years old in 2025.

What condition is State Route 41 over Estrella River 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 2022.

How much traffic does State Route 41 over Estrella River carry?

About 2,086 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is State Route 41 over Estrella River?

The structure is 425 ft (129.4 m) long with a longest span of 40 ft (12.2 m) and a deck 32 ft wide.

Who owns State Route 41 over Estrella River?

It is owned by the State Highway Agency and maintained by the County Highway Agency.