US Bridges

S101-W129 Off Ramp over San Juan Creek

Good

San Benito County, California · 05-SBT-101-4.93 · Structure no. 43 0010F

Built
1967
58 years old
Condition
Good
inspected April 2024
Type
Culvert
Concrete Continuous
Length
30 ft
3 main spans
Daily traffic
2,000
2009 count
Owner
State
State Highway Agency

About this bridge

S101-W129 Off Ramp over San Juan Creek is a concrete continuous culvert carrying S101-W129 Off Ramp over San Juan Creek in San Benito County, California. It was built in 1967, so it is 58 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 2,000 vehicles a day, roughly 16% of them trucks, projected to reach 6,649 by 2042. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesS101-W129 Off Ramp
CrossesSan Juan Creek
Location05-SBT-101-4.93
RouteU.S. Route 101
Coordinates36.88355, -121.56223
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2009)
Projected traffic6,649 by 2042
Trucks16%
Lanes on structure2
Traffic directionOne-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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was S101-W129 Off Ramp over San Juan Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is S101-W129 Off Ramp over San Juan Creek 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 April 2024.

How much traffic does S101-W129 Off Ramp over San Juan Creek carry?

About 2,000 vehicles per day (2009 count), of which roughly 16% are trucks.

How long is S101-W129 Off Ramp over San Juan Creek?

The structure is 30 ft (9.1 m) long with a longest span of 8 ft (2.4 m).

Who owns S101-W129 Off Ramp over San Juan Creek?

It is owned by the State Highway Agency.