Structure 35 0350 · San Mateo County, CA

State Route 1 over San Pedro Creek

Carries State Route 1 over San Pedro Creek, 04-sm-001-40.83.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT140 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

140 ft end to end, longest span 77 ft. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a slab bridge.

Built201511 years old
Length140.1 ft42.7 m
Daily traffic14,500counted 2009
Last inspectedOctober 2024every 48 months

Location

StateCalifornia
CountySan Mateo
Location04-sm-001-40.83
CarriesState Route 1
CrossesSan Pedro Creek
Coordinates37.59469, -122.50514

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignSlab
Total Length140.1 ft (42.7 m)
Max Span77.1 ft (23.5 m)
Deck Width63.0 ft (19.2 m)
Deck Area819.8 sq m
Main Spans2
Year Built2015

Traffic

Avg Daily Traffic14,500 (2009)
Truck Traffic1%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number35 0350

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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