US Bridges

U.S. Highway 101 over Arroyo Calleguas

Fair

Ventura County, California · 07-VEN-101-12.76-CMRL · Structure no. 52 0009

Built
1987
38 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
241 ft
4 main spans
Daily traffic
136,000
2017 count
Owner
State
State Highway Agency

About this bridge

U.S. Highway 101 over Arroyo Calleguas is a concrete continuous box beam or girders - multiple carrying U.S. Highway 101 over Arroyo Calleguas in Ventura County, California. It was built in 1987, so it is 38 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 136,000 vehicles a day, roughly 8% of them trucks, projected to reach 205,166 by 2042. The structure is 241 ft (73.5 m) long and 128 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesU.S. Highway 101
CrossesArroyo Calleguas
Location07-VEN-101-12.76-CMRL
RouteU.S. Route 101
Coordinates34.21589, -119.01483
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 protection8 Very GoodNo problems noted.
Last inspectionJune 2024
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 geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.3 US tons
Inventory rating38.3 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length241 ft (73.5 m)
Longest span70 ft (21.2 m)
Deck width128 ft (39 m)
Roadway width123 ft (37.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic136,000 (2017)
Projected traffic205,166 by 2042
Trucks8%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Arroyo Calleguas built?

It was built in 1987, making it 38 years old in 2025.

What condition is U.S. Highway 101 over Arroyo Calleguas 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 June 2024.

How much traffic does U.S. Highway 101 over Arroyo Calleguas carry?

About 136,000 vehicles per day (2017 count), of which roughly 8% are trucks.

How long is U.S. Highway 101 over Arroyo Calleguas?

The structure is 241 ft (73.5 m) long with a longest span of 70 ft (21.2 m) and a deck 128 ft wide.

Who owns U.S. Highway 101 over Arroyo Calleguas?

It is owned by the State Highway Agency.