US Bridges

NB US Highway 101 over Ronan Diversion Channel

Good

Santa Clara County, California · 04-SCL-101-R6.56-GIL · Structure no. 37 0327R

Built
1973
52 years old
Condition
Good
inspected October 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
179 ft
3 main spans
Daily traffic
26,000
2009 count
Owner
State
State Highway Agency

About this bridge

NB US Highway 101 over Ronan Diversion Channel is a concrete continuous box beam or girders - multiple carrying NB US Highway 101 over Ronan Diversion Channel in Santa Clara 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 26,000 vehicles a day, roughly 8% of them trucks, projected to reach 66,313 by 2046. The structure is 179 ft (54.5 m) long and 53 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesNB US Highway 101
CrossesRonan Diversion Channel
Location04-SCL-101-R6.56-GIL
RouteU.S. Route 101
CountySanta Clara County
StateCalifornia
Coordinates37.00944, -121.55932
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating59.6 US tons
Inventory rating45.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length179 ft (54.5 m)
Longest span68 ft (20.8 m)
Deck width53 ft (16.2 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deck18 ft (5.4 m)

Traffic and service

Average daily traffic26,000 (2009)
Projected traffic66,313 by 2046
Trucks8%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 NB US Highway 101 over Ronan Diversion Channel built?

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

What condition is NB US Highway 101 over Ronan Diversion Channel 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 October 2024.

How much traffic does NB US Highway 101 over Ronan Diversion Channel carry?

About 26,000 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is NB US Highway 101 over Ronan Diversion Channel?

The structure is 179 ft (54.5 m) long with a longest span of 68 ft (20.8 m) and a deck 53 ft wide.

Who owns NB US Highway 101 over Ronan Diversion Channel?

It is owned by the State Highway Agency.