US Bridges

Either Way Lane over San Lorenzo River

FairPosted for load

Santa Cruz County, California · 0.1 MI SW of State RTE 9 · Structure no. 36C0073

Built
1940
85 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
61 ft
3 main spans
Daily traffic
300
2015 count
Owner
County
County Highway Agency

About this bridge

Either Way Lane over San Lorenzo River is a steel stringer/multi-beam or girder carrying Either Way Lane over San Lorenzo River in Santa Cruz County, California. It was built in 1940, so it is 85 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. Its operating status is: posted for load restriction.

It carries about 300 vehicles a day, roughly 10% of them trucks, projected to reach 510 by 2042. The structure is 61 ft (18.6 m) long and 15 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesEither Way Lane
CrossesSan Lorenzo River
Location0.1 MI SW of State RTE 9
RouteCounty Highway 0
Coordinates37.17226, -122.13949
Functional classUrban Local

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating10.4 US tons
Inventory rating6.1 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length61 ft (18.6 m)
Longest span22 ft (6.7 m)
Deck width15 ft (4.6 m)
Roadway width10 ft (2.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2015)
Projected traffic510 by 2042
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed123.7 mi (199 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 Either Way Lane over San Lorenzo River built?

It was built in 1940, making it 85 years old in 2025.

What condition is Either Way Lane over San Lorenzo River 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 November 2024.

How much traffic does Either Way Lane over San Lorenzo River carry?

About 300 vehicles per day (2015 count), of which roughly 10% are trucks.

How long is Either Way Lane over San Lorenzo River?

The structure is 61 ft (18.6 m) long with a longest span of 22 ft (6.7 m) and a deck 15 ft wide.

Who owns Either Way Lane over San Lorenzo River?

It is owned by the County Highway Agency.