US Bridges

Bean Hollow Road over Arroyo De Los Frijoles

Fair

San Mateo County, California · 0.2 MI North of S.H. 1 · Structure no. 35C0004

Built
1922
103 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete Continuous
Length
44 ft
4 main spans
Daily traffic
175
2018 count
Owner
County
County Highway Agency

About this bridge

Bean Hollow Road over Arroyo De Los Frijoles is a concrete continuous culvert carrying Bean Hollow Road over Arroyo De Los Frijoles in San Mateo County, California. It was built in 1922, so it is 103 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 175 vehicles a day, roughly 10% of them trucks, projected to reach 266 by 2042. The structure is 44 ft (13.5 m) long and 23 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesBean Hollow Road
CrossesArroyo De Los Frijoles
Location0.2 MI North of S.H. 1
RouteCounty Highway 0
CountySan Mateo County
StateCalifornia
Coordinates37.22426, -122.4056
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length44 ft (13.5 m)
Longest span10 ft (3 m)
Deck width23 ft (7 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic175 (2018)
Projected traffic266 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Bean Hollow Road over Arroyo De Los Frijoles built?

It was built in 1922, making it 103 years old in 2025.

What condition is Bean Hollow Road over Arroyo De Los Frijoles 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 April 2024.

How much traffic does Bean Hollow Road over Arroyo De Los Frijoles carry?

About 175 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is Bean Hollow Road over Arroyo De Los Frijoles?

The structure is 44 ft (13.5 m) long with a longest span of 10 ft (3 m) and a deck 23 ft wide.

Who owns Bean Hollow Road over Arroyo De Los Frijoles?

It is owned by the County Highway Agency.