US Bridges

Sir Francis Drake over Whites Hill Trail

Fair

Marin County, California · 0.6 MI N/O Baywood Cyn RD · Structure no. 27C0157

Built
2002
23 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
380 ft
1 main span
Daily traffic
3,500
1998 count
Owner
County
County Highway Agency

About this bridge

Sir Francis Drake over Whites Hill Trail is a steel stringer/multi-beam or girder carrying Sir Francis Drake over Whites Hill Trail in Marin County, California. It was built in 2002, so it is 23 years old, younger 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 3,500 vehicles a day, roughly 5% of them trucks, projected to reach 6,564 by 2041. The structure is 380 ft (115.9 m) long and 43 ft wide. If it were closed, the detour would be 18.6 mi (30 km).

CarriesSir Francis Drake
CrossesWhites Hill Trail
Location0.6 MI N/O Baywood Cyn RD
RouteCounty Highway 0
Coordinates38.00976, -122.61732
Functional classRural Major 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.2 US tons
Inventory rating47.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length380 ft (115.9 m)
Longest span379 ft (115.5 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,500 (1998)
Projected traffic6,564 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesOther
Detour if closed18.6 mi (30 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Sir Francis Drake over Whites Hill Trail built?

It was built in 2002, making it 23 years old in 2025.

What condition is Sir Francis Drake over Whites Hill Trail 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 August 2023.

How much traffic does Sir Francis Drake over Whites Hill Trail carry?

About 3,500 vehicles per day (1998 count), of which roughly 5% are trucks.

How long is Sir Francis Drake over Whites Hill Trail?

The structure is 380 ft (115.9 m) long with a longest span of 379 ft (115.5 m) and a deck 43 ft wide.

Who owns Sir Francis Drake over Whites Hill Trail?

It is owned by the County Highway Agency.