US Bridges

Bernal Ave over Easton Creek

Fair

San Mateo County, California · East of Easton DR · Structure no. 35C0105

Built
1936
89 years old
Condition
Fair
inspected May 2023
Type
Tee Beam
Concrete Continuous
Length
48 ft
2 main spans
Daily traffic
300
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Bernal Ave over Easton Creek is a concrete continuous tee beam carrying Bernal Ave over Easton Creek in San Mateo County, California. It was built in 1936, so it is 89 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 300 vehicles a day, roughly 1% of them trucks, projected to reach 436 by 2041. The structure is 48 ft (14.6 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesBernal Ave
CrossesEaston Creek
LocationEast of Easton DR
RouteCity Street 0
CountySan Mateo County
StateCalifornia
Coordinates37.58175, -122.3709
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28.5 US tons
Inventory rating17.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length48 ft (14.6 m)
Longest span31 ft (9.4 m)
Deck width50 ft (15.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2019)
Projected traffic436 by 2041
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Bernal Ave over Easton Creek built?

It was built in 1936, making it 89 years old in 2025.

What condition is Bernal Ave over Easton 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 May 2023.

How much traffic does Bernal Ave over Easton Creek carry?

About 300 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is Bernal Ave over Easton Creek?

The structure is 48 ft (14.6 m) long with a longest span of 31 ft (9.4 m) and a deck 50 ft wide.

Who owns Bernal Ave over Easton Creek?

It is owned by the City or Municipal Highway Agency.