US Bridges

Comstock Road over Arroyo De Los Viboras

Fair

San Benito County, California · 4 MI E Fairview RD · Structure no. 43C0047

Built
1940
85 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
1,500
2010 count
Owner
County
County Highway Agency

About this bridge

Comstock Road over Arroyo De Los Viboras is a steel stringer/multi-beam or girder carrying Comstock Road over Arroyo De Los Viboras 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 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 1,500 vehicles a day, roughly 5% of them trucks, projected to reach 1,699 by 2047. The structure is 31 ft (9.5 m) long and 15 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
CarriesComstock Road
CrossesArroyo De Los Viboras
Location4 MI E Fairview RD
RouteCounty Highway 0
CountySan Benito County
StateCalifornia
Coordinates36.93716, -121.30617
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating23.6 US tons
Inventory rating18.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length31 ft (9.5 m)
Longest span30 ft (9.1 m)
Deck width15 ft (4.6 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2010)
Projected traffic1,699 by 2047
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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 Comstock Road over Arroyo De Los Viboras built?

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

What condition is Comstock Road over Arroyo De Los Viboras 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 Comstock Road over Arroyo De Los Viboras carry?

About 1,500 vehicles per day (2010 count), of which roughly 5% are trucks.

How long is Comstock Road over Arroyo De Los Viboras?

The structure is 31 ft (9.5 m) long with a longest span of 30 ft (9.1 m) and a deck 15 ft wide.

Who owns Comstock Road over Arroyo De Los Viboras?

It is owned by the County Highway Agency.