US Bridges

Willowbrook DR over Corte Madera Creek

Good

San Mateo County, California · 0.2 MI S Portola DR · Structure no. 35C0167

Built
1989
36 years old
Condition
Good
inspected May 2024
Type
Slab
Concrete
Length
29 ft
1 main span
Daily traffic
5,000
2017 count
Owner
City
City or Municipal Highway Agency

About this bridge

Willowbrook DR over Corte Madera Creek is a concrete slab carrying Willowbrook DR over Corte Madera Creek in San Mateo County, California. It was built in 1989, so it is 36 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 5,000 vehicles a day, roughly 1% of them trucks, projected to reach 7,633 by 2046. The structure is 29 ft (8.8 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesWillowbrook DR
CrossesCorte Madera Creek
Location0.2 MI S Portola DR
RouteCity Street 0
Coordinates37.37371, -122.21985
Functional classUrban Local

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 inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.8 US tons
Inventory rating32.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span28 ft (8.4 m)
Deck width36 ft (10.9 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2017)
Projected traffic7,633 by 2046
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 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 Willowbrook DR over Corte Madera Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is Willowbrook DR over Corte Madera 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 May 2024.

How much traffic does Willowbrook DR over Corte Madera Creek carry?

About 5,000 vehicles per day (2017 count), of which roughly 1% are trucks.

How long is Willowbrook DR over Corte Madera Creek?

The structure is 29 ft (8.8 m) long with a longest span of 28 ft (8.4 m) and a deck 36 ft wide.

Who owns Willowbrook DR over Corte Madera Creek?

It is owned by the City or Municipal Highway Agency.