US Bridges

College Ave over Corte Madera Creek

Good

Marin County, California · 0.2 MI So Sir Frncs Drake · Structure no. 27C0070

Built
1970
55 years old
Condition
Good
inspected July 2023
Type
Slab
Concrete
Length
34 ft
1 main span
Daily traffic
6,000
2005 count
Owner
County
County Highway Agency

About this bridge

College Ave over Corte Madera Creek is a concrete slab carrying College Ave over Corte Madera Creek in Marin County, California. It was built in 1970, so it is 55 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 6,000 vehicles a day, roughly 5% of them trucks, projected to reach 15,469 by 2041. The structure is 34 ft (10.4 m) long and 60 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCollege Ave
CrossesCorte Madera Creek
Location0.2 MI So Sir Frncs Drake
RouteCity Street 0
CountyMarin County
StateCalifornia
Coordinates37.95417, -122.5485
Functional classUrban Minor Arterial

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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.1 US tons
Inventory rating22.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length34 ft (10.4 m)
Longest span34 ft (10.4 m)
Deck width60 ft (18.2 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,000 (2005)
Projected traffic15,469 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 College Ave over Corte Madera Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is College Ave 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 College Ave over Corte Madera Creek carry?

About 6,000 vehicles per day (2005 count), of which roughly 5% are trucks.

How long is College Ave over Corte Madera Creek?

The structure is 34 ft (10.4 m) long with a longest span of 34 ft (10.4 m) and a deck 60 ft wide.

Who owns College Ave over Corte Madera Creek?

It is owned by the County Highway Agency.