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Pilarcitos Creek Bridge

Photos 

Pilarcitos Creek bridge plaque

Photo taken by Brian Smith, submitted by Craig Philpott

Enlarge

BH Photo #198225

Map 

Street View 

Description 

HalfMoon Bay's Pilarcitos Creek Bridge, also known as the Main Street Bridge, was built in early 1900 across Pilarcitos Creek, adjacent to Zaballa House and SpanishTown. It was the first concrete bridge built in San Mateo County, and remains possibly the oldest prestressed concrete bridge in the world. It is also the second oldest surviving example of a steel reinforced concrete arch bridge in California. Approximately 80 feet long, and with a useful width of 24.3 feet, the bridge retains a high degree of historic integrity as it is fundamentally unaltered from its original construction. [NRHP form]

Facts 

Overview
Concrete arch bridge over Pilarcitos Creek on Main Street in Half Moon Bay
Location
Half Moon Bay, San Mateo County, California
Status
Open to traffic
History
Built 1900
Builders
- D. Bromfield & C. Tobey Jr. (Engineers)
- R.C. Mattingly & W. Heafey (Contractors)
Design
Arch
Dimensions
Length of largest span: 60.0 ft.
Total length: 80.1 ft.
Deck width: 24.3 ft.
Recognition
Posted to the National Register of Historic Places on April 7, 2014
Also called
Main Street Bridge
Approximate latitude, longitude
+37.46583, -122.42889   (decimal degrees)
37°27'57" N, 122°25'44" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/550503/4146703 (zone/easting/northing)
Quadrangle map:
Half Moon Bay
Inventory numbers
CA 35C-25 (California bridge number)
NRHP 14000110 (National Register of Historic Places reference number)
BH 11470 (Bridgehunter.com ID)
Inspection (as of 07/2015)
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Very Good (8 out of 9)
Appraisal: Functionally obsolete
Sufficiency rating: 49.1 (out of 100)
Average daily traffic (as of 2011)
8,350

Update Log 

  • August 9, 2014: Updated by Dave King: Adjusted NRHP status - Listed
  • April 20, 2014: Updated by Craig Philpott: updated bridge, added photos
  • April 14, 2014: Updated by Luke Harden: Bridge is also doomed
  • April 14, 2014: New photo from Brian Smith
  • April 29, 2011: New photo from Craig Philpott
  • May 23, 2010: New Street View added by Craig Philpott

Sources 

Comments 

Pilarcitos Creek Bridge
Posted April 14, 2014, by Luke Harden (lukemh9 [at] gmail [dot] com)
Pilarcitos Creek Bridge
Posted April 14, 2014, by Luke Harden (lukemh9 [at] gmail [dot] com)