US Bridges

Winship Road over Corte Madera Creek

Fair

Marin County, California · 0.03 MI E/O Sir Fran Drk · Structure no. 27C0074

Built
1909
116 years old
Condition
Fair
inspected July 2023
Type
Arch - Deck
Concrete
Length
91 ft
2 main spans
Daily traffic
2,000
2004 count
Owner
City
City or Municipal Highway Agency

About this bridge

Winship Road over Corte Madera Creek is a concrete arch - deck carrying Winship Road over Corte Madera Creek in Marin County, California. It was built in 1909, so it is 116 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 2,000 vehicles a day, roughly 2% of them trucks, projected to reach 2,398 by 2041. The structure is 91 ft (27.7 m) long and 26 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesWinship Road
CrossesCorte Madera Creek
Location0.03 MI E/O Sir Fran Drk
RouteCity Street 0
CountyMarin County
StateCalifornia
Coordinates37.96923, -122.56001
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating27.4 US tons
Inventory rating16.4 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length91 ft (27.7 m)
Longest span42 ft (12.9 m)
Deck width26 ft (8 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2004)
Projected traffic2,398 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 Winship Road over Corte Madera Creek built?

It was built in 1909, making it 116 years old in 2025.

What condition is Winship Road over Corte Madera 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 July 2023.

How much traffic does Winship Road over Corte Madera Creek carry?

About 2,000 vehicles per day (2004 count), of which roughly 2% are trucks.

How long is Winship Road over Corte Madera Creek?

The structure is 91 ft (27.7 m) long with a longest span of 42 ft (12.9 m) and a deck 26 ft wide.

Who owns Winship Road over Corte Madera Creek?

It is owned by the City or Municipal Highway Agency.