US Bridges

Porter Street over Soquel Creek

Poor

Santa Cruz County, California · 0.1 MI N of SR 1 · Structure no. 36C0067

Built
1994
31 years old
Condition
Poor
inspected September 2023
Type
Box Beam or Girders - Multiple
Concrete
Length
135 ft
1 main span
Daily traffic
11,200
2015 count
Owner
County
County Highway Agency

About this bridge

Porter Street over Soquel Creek is a concrete box beam or girders - multiple carrying Porter Street over Soquel Creek in Santa Cruz County, California. It was built in 1994, so it is 31 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 11,200 vehicles a day, roughly 10% of them trucks, projected to reach 11,200 by 2040. The structure is 135 ft (41.1 m) long and 80 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesPorter Street
CrossesSoquel Creek
Location0.1 MI N of SR 1
RouteCounty Highway 0
Coordinates36.98462, -121.95712
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110 US tons
Inventory rating91.8 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length135 ft (41.1 m)
Longest span131 ft (39.9 m)
Deck width80 ft (24.4 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,200 (2015)
Projected traffic11,200 by 2040
Trucks10%
Lanes on structure4
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

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 Porter Street over Soquel Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is Porter Street over Soquel Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2023.

How much traffic does Porter Street over Soquel Creek carry?

About 11,200 vehicles per day (2015 count), of which roughly 10% are trucks.

How long is Porter Street over Soquel Creek?

The structure is 135 ft (41.1 m) long with a longest span of 131 ft (39.9 m) and a deck 80 ft wide.

Who owns Porter Street over Soquel Creek?

It is owned by the County Highway Agency.