US Bridges

Mission Vineyard R over San Juan Creek

Fair

San Benito County, California · South of SH 156 · Structure no. 43C0040

Built
1940
85 years old
Condition
Fair
inspected January 2025
Type
Culvert
Concrete Continuous
Length
47 ft
3 main spans
Daily traffic
500
2010 count
Owner
County
County Highway Agency

About this bridge

Mission Vineyard R over San Juan Creek is a concrete continuous culvert carrying Mission Vineyard R over San Juan Creek in San Benito County, California. It was built in 1940, so it is 85 years old, older 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 6 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 500 vehicles a day, roughly 5% of them trucks, projected to reach 637 by 2047. The structure is 47 ft (14.4 m) long and 44 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesMission Vineyard R
CrossesSan Juan Creek
LocationSouth of SH 156
RouteCounty Highway 0
CountySan Benito County
StateCalifornia
Coordinates36.84052, -121.51928
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length47 ft (14.4 m)
Longest span14 ft (4.2 m)
Deck width44 ft (13.4 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2010)
Projected traffic637 by 2047
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Mission Vineyard R over San Juan Creek built?

It was built in 1940, making it 85 years old in 2025.

What condition is Mission Vineyard R over San Juan Creek 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 January 2025.

How much traffic does Mission Vineyard R over San Juan Creek carry?

About 500 vehicles per day (2010 count), of which roughly 5% are trucks.

How long is Mission Vineyard R over San Juan Creek?

The structure is 47 ft (14.4 m) long with a longest span of 14 ft (4.2 m) and a deck 44 ft wide.

Who owns Mission Vineyard R over San Juan Creek?

It is owned by the County Highway Agency.