US Bridges

Locust Ave over Ayo Corte Madera Del Pre

Fair

Marin County, California · 250 Ft N of Miller Ave · Structure no. 27C0065

Built
1934
91 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete
Length
25 ft
1 main span
Daily traffic
4,500
2004 count
Owner
City
City or Municipal Highway Agency

About this bridge

Locust Ave over Ayo Corte Madera Del Pre is a concrete slab carrying Locust Ave over Ayo Corte Madera Del Pre in Marin County, California. It was built in 1934, so it is 91 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 4,500 vehicles a day, roughly 5% of them trucks, projected to reach 6,760 by 2041. The structure is 25 ft (7.6 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesLocust Ave
CrossesAyo Corte Madera Del Pre
Location250 Ft N of Miller Ave
RouteCity Street 0
Coordinates37.89867, -122.53702
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
Deck7 GoodSome minor problems.
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
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating31.7 US tons
Inventory rating19.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span24 ft (7.2 m)
Deck width52 ft (15.7 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,500 (2004)
Projected traffic6,760 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 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 Locust Ave over Ayo Corte Madera Del Pre built?

It was built in 1934, making it 91 years old in 2025.

What condition is Locust Ave over Ayo Corte Madera Del Pre 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 Locust Ave over Ayo Corte Madera Del Pre carry?

About 4,500 vehicles per day (2004 count), of which roughly 5% are trucks.

How long is Locust Ave over Ayo Corte Madera Del Pre?

The structure is 25 ft (7.6 m) long with a longest span of 24 ft (7.2 m) and a deck 52 ft wide.

Who owns Locust Ave over Ayo Corte Madera Del Pre?

It is owned by the City or Municipal Highway Agency.