US Bridges

State Route 1 over San Pedro Creek

Good

San Mateo County, California · 04-SM-001-40.83 · Structure no. 35 0350

Built
2015
10 years old
Condition
Good
inspected October 2024
Type
Slab
Prestressed Concrete Continuous
Length
140 ft
2 main spans
Daily traffic
14,500
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 1 over San Pedro Creek is a prestressed concrete continuous slab carrying State Route 1 over San Pedro Creek in San Mateo County, California. It was built in 2015, so it is 10 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 14,500 vehicles a day, roughly 1% of them trucks, projected to reach 40,603 by 2042. The structure is 140 ft (42.7 m) long and 63 ft wide. If it were closed, the detour would be 23 mi (37 km).

CarriesState Route 1
CrossesSan Pedro Creek
Location04-SM-001-40.83
RouteState Highway 1
Coordinates37.59469, -122.50514
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length140 ft (42.7 m)
Longest span77 ft (23.5 m)
Deck width63 ft (19.2 m)
Roadway width47 ft (14.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,500 (2009)
Projected traffic40,603 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed23 mi (37 km)
TollOn a free road
National Highway SystemYes

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 San Pedro Creek built?

It was built in 2015, making it 10 years old in 2025.

What condition is State Route 1 over San Pedro Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2024.

How much traffic does State Route 1 over San Pedro Creek carry?

About 14,500 vehicles per day (2009 count), of which roughly 1% are trucks.

How long is State Route 1 over San Pedro Creek?

The structure is 140 ft (42.7 m) long with a longest span of 77 ft (23.5 m) and a deck 63 ft wide.

Who owns State Route 1 over San Pedro Creek?

It is owned by the State Highway Agency.