US Bridges

State Route 1 over Pescadero Creek

Fair

San Mateo County, California · 04-SM-001-14.00 · Structure no. 35 0028

Built
1991
34 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
380 ft
3 main spans
Daily traffic
6,100
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 1 over Pescadero Creek is a prestressed concrete continuous box beam or girders - multiple carrying State Route 1 over Pescadero Creek in San Mateo County, California. It was built in 1991, so it is 34 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 6 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 6,100 vehicles a day, roughly 5% of them trucks, projected to reach 9,189 by 2046. The structure is 380 ft (115.8 m) long and 49 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesState Route 1
CrossesPescadero Creek
Location04-SM-001-14.00
RouteState Highway 1
CountySan Mateo County
StateCalifornia
Coordinates37.2658, -122.41165
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length380 ft (115.8 m)
Longest span152 ft (46.3 m)
Deck width49 ft (15 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,100 (2009)
Projected traffic9,189 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed24.9 mi (40 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 State Route 1 over Pescadero Creek built?

It was built in 1991, making it 34 years old in 2025.

What condition is State Route 1 over Pescadero Creek 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 October 2024.

How much traffic does State Route 1 over Pescadero Creek carry?

About 6,100 vehicles per day (2009 count), of which roughly 5% are trucks.

How long is State Route 1 over Pescadero Creek?

The structure is 380 ft (115.8 m) long with a longest span of 152 ft (46.3 m) and a deck 49 ft wide.

Who owns State Route 1 over Pescadero Creek?

It is owned by the State Highway Agency.