US Bridges

US 101 W&e Bayshr over San Francisquito Creek

Good

San Mateo County, California · 04-SM-101-0.01-PA · Structure no. 35 0348

Built
2018
7 years old
Condition
Good
inspected August 2021
Type
Slab
Concrete Continuous
Length
125 ft
4 main spans
Daily traffic
225,800
2017 count
Owner
State
State Highway Agency

About this bridge

US 101 W&e Bayshr over San Francisquito Creek is a concrete continuous slab carrying US 101 W&e Bayshr over San Francisquito Creek in San Mateo County, California. It was built in 2018, so it is 7 years old, younger 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 225,800 vehicles a day, roughly 4% of them trucks, projected to reach 293,354 by 2043. The structure is 125 ft (38.1 m) long and 241 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesUS 101 W&e Bayshr
CrossesSan Francisquito Creek
Location04-SM-101-0.01-PA
RouteU.S. Route 101
Coordinates37.45299, -122.12746
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadGreater than HL 93
Structure length125 ft (38.1 m)
Longest span32 ft (9.7 m)
Deck width241 ft (73.5 m)
Roadway width156 ft (47.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic225,800 (2017)
Projected traffic293,354 by 2043
Trucks4%
Lanes on structure14
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed11.8 mi (19 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 101 W&e Bayshr over San Francisquito Creek built?

It was built in 2018, making it 7 years old in 2025.

What condition is US 101 W&e Bayshr over San Francisquito 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 August 2021.

How much traffic does US 101 W&e Bayshr over San Francisquito Creek carry?

About 225,800 vehicles per day (2017 count), of which roughly 4% are trucks.

How long is US 101 W&e Bayshr over San Francisquito Creek?

The structure is 125 ft (38.1 m) long with a longest span of 32 ft (9.7 m) and a deck 241 ft wide.

Who owns US 101 W&e Bayshr over San Francisquito Creek?

It is owned by the State Highway Agency.