US Bridges

US Highway 101 NB over Dulah Road

Good

Ventura County, California · 07-VEN-101-R34.68 · Structure no. 52 0220R

Built
1973
52 years old
Condition
Good
inspected August 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
118 ft
1 main span
Daily traffic
40,500
2018 count
Owner
State
State Highway Agency

About this bridge

US Highway 101 NB over Dulah Road is a prestressed concrete box beam or girders - multiple carrying US Highway 101 NB over Dulah Road in Ventura County, California. It was built in 1973, so it is 52 years old, younger 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 40,500 vehicles a day, roughly 8% of them trucks, projected to reach 60,345 by 2046. The structure is 118 ft (36 m) long and 53 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS Highway 101 NB
CrossesDulah Road
Location07-VEN-101-R34.68
RouteU.S. Route 101
Coordinates34.3119, -119.35624
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating34 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length118 ft (36 m)
Longest span118 ft (36 m)
Deck width53 ft (16.3 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40,500 (2018)
Projected traffic60,345 by 2046
Trucks8%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US Highway 101 NB over Dulah Road built?

It was built in 1973, making it 52 years old in 2025.

What condition is US Highway 101 NB over Dulah Road 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 August 2024.

How much traffic does US Highway 101 NB over Dulah Road carry?

About 40,500 vehicles per day (2018 count), of which roughly 8% are trucks.

How long is US Highway 101 NB over Dulah Road?

The structure is 118 ft (36 m) long with a longest span of 118 ft (36 m) and a deck 53 ft wide.

Who owns US Highway 101 NB over Dulah Road?

It is owned by the State Highway Agency.