US Bridges

Madonna RD over Prefumo Creek

Fair

San Luis Obispo County, California · Slo Cty · Structure no. 49C0372

Built
1958
67 years old, rebuilt 1974
Condition
Fair
inspected May 2023
Type
Culvert
Concrete Continuous
Length
39 ft
3 main spans
Daily traffic
26,985
2008 count
Owner
City
City or Municipal Highway Agency

About this bridge

Madonna RD over Prefumo Creek is a concrete continuous culvert carrying Madonna RD over Prefumo Creek in San Luis Obispo County, California. It was built in 1958 and reconstructed in 1974, so it is 67 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 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 26,985 vehicles a day, roughly 3% of them trucks, projected to reach 31,535 by 2045. The structure is 39 ft (11.9 m) long and 99 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesMadonna RD
CrossesPrefumo Creek
LocationSlo Cty
RouteCity Street 0
Coordinates35.25953, -120.68369
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.7 US tons
Inventory rating13.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadUnknown
Structure length39 ft (11.9 m)
Longest span16 ft (4.8 m)
Deck width99 ft (30.2 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,985 (2008)
Projected traffic31,535 by 2045
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Madonna RD over Prefumo Creek built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1974.

What condition is Madonna RD over Prefumo 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 Madonna RD over Prefumo Creek carry?

About 26,985 vehicles per day (2008 count), of which roughly 3% are trucks.

How long is Madonna RD over Prefumo Creek?

The structure is 39 ft (11.9 m) long with a longest span of 16 ft (4.8 m) and a deck 99 ft wide.

Who owns Madonna RD over Prefumo Creek?

It is owned by the City or Municipal Highway Agency.