US Bridges

Sir Francis Drake over Corte Madera Creek

Good

Marin County, California · 3.0 MI E of US HWY 101 · Structure no. 27C0050

Built
1926
99 years old, rebuilt 1950
Condition
Good
inspected July 2023
Type
Arch - Deck
Concrete
Length
63 ft
1 main span
Daily traffic
32,300
2005 count
Owner
City
City or Municipal Highway Agency

About this bridge

Sir Francis Drake over Corte Madera Creek is a concrete arch - deck carrying Sir Francis Drake over Corte Madera Creek in Marin County, California. It was built in 1926 and reconstructed in 1950, so it is 99 years old, older 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 32,300 vehicles a day, roughly 5% of them trucks, projected to reach 52,338 by 2041. The structure is 63 ft (19.2 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSir Francis Drake
CrossesCorte Madera Creek
Location3.0 MI E of US HWY 101
RouteCity Street 0
Coordinates37.9679, -122.5598
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating17.9 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length63 ft (19.2 m)
Longest span50 ft (15.2 m)
Deck width44 ft (13.4 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,300 (2005)
Projected traffic52,338 by 2041
Trucks5%
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 statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sir Francis Drake over Corte Madera Creek built?

It was built in 1926, making it 99 years old in 2025. It was reconstructed in 1950.

What condition is Sir Francis Drake 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 July 2023.

How much traffic does Sir Francis Drake over Corte Madera Creek carry?

About 32,300 vehicles per day (2005 count), of which roughly 5% are trucks.

How long is Sir Francis Drake over Corte Madera Creek?

The structure is 63 ft (19.2 m) long with a longest span of 50 ft (15.2 m) and a deck 44 ft wide.

Who owns Sir Francis Drake over Corte Madera Creek?

It is owned by the City or Municipal Highway Agency.