US Bridges

U.S. Highway 101 over Madranio Canyon Crk

Good

Ventura County, California · 07-VEN-101-R39.18 · Structure no. 52 0351

Built
1926
99 years old, rebuilt 1973
Condition
Good
inspected December 2024
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
76,000
2019 count
Owner
State
State Highway Agency

About this bridge

U.S. Highway 101 over Madranio Canyon Crk is a concrete culvert carrying U.S. Highway 101 over Madranio Canyon Crk in Ventura County, California. It was built in 1926 and reconstructed in 1973, so it is 99 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 76,000 vehicles a day, roughly 8% of them trucks, projected to reach 150,645 by 2041. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesU.S. Highway 101
CrossesMadranio Canyon Crk
Location07-VEN-101-R39.18
RouteU.S. Route 101
Coordinates34.34438, -119.41907
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic76,000 (2019)
Projected traffic150,645 by 2041
Trucks8%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 U.S. Highway 101 over Madranio Canyon Crk built?

It was built in 1926, making it 99 years old in 2025. It was reconstructed in 1973.

What condition is U.S. Highway 101 over Madranio Canyon Crk in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2024.

How much traffic does U.S. Highway 101 over Madranio Canyon Crk carry?

About 76,000 vehicles per day (2019 count), of which roughly 8% are trucks.

How long is U.S. Highway 101 over Madranio Canyon Crk?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m).

Who owns U.S. Highway 101 over Madranio Canyon Crk?

It is owned by the State Highway Agency.