Rating:
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Larkin Street Bridge

Photos 

Larkin Street Bridge

View to NW showing extensive concrete reinforcement under original span

Photo taken by Craig Philpott

Enlarge

BH Photo #192365

Map 

Street View 

Description 

According to the 1917 Yearbook of the Monterey High School, "Because the school was surrounded by ravines and forest, the only way students could get into the school site was across the Larkin Street Bridge. The Larkin Street bridge was built exclusively to service the school, so they built the bridge before they built the school. The bridge was an engineering marvel of its time. The design is a suspension bridge, much like the Gold Gate bridge except encased in concrete. It remains one of the only bridges left in the country of this design.

http://mhs-mpusd-ca.schoolloop.com/history

Facts 

Overview
Canticrete deck truss bridge over Hartnell Gulch on Larkin Street
Location
Monterey, Monterey County, California
Status
Open to traffic
History
Built 1914; Rehabilitated 2007
Builder
- John B. Leonard of Union City, Michigan (Engineer)
Design
Described in the book, Historic Highway Bridges of California, as a "canticrete" bridge, invented by John B. Leonard. A mixed design using steel trusses within the arch ribs, the trusses are cantilevered from the foundation piers and pinned together at the crest of the arch. (The truss was used to forgo normal falsework used to build an arch. As well Leonard used rebar throughout the arches).
Dimensions
Length of largest span: 60.0 ft.
Total length: 106.0 ft.
Deck width: 21.0 ft.
Recognition
Eligible for the National Register of Historic Places
Also called
Hartnell Gulch
Approximate latitude, longitude
+36.59694, -121.90000   (decimal degrees)
36°35'49" N, 121°54'00" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/598389/4050724 (zone/easting/northing)
Quadrangle map:
Monterey
Inventory numbers
CA 44C-82 (California bridge number)
BH 47075 (Bridgehunter.com ID)
Inspection (as of 06/2014)
Deck condition rating: Good (7 out of 9)
Superstructure condition rating: Poor (4 out of 9)
Substructure condition rating: Good (7 out of 9)
Sufficiency rating: 15.2 (out of 100)
Average daily traffic (as of 2008)
3,000

Update Log 

  • September 8, 2014: Updated by Royce and Bobette Haley: Rehabilitaded date and expanded on the design
  • July 21, 2013: Updated by Mike Lynch: historical picture and information on bridge. Also some additional close-up pictures of bridge features.
  • January 16, 2011: New photos from Craig Philpott
  • November 23, 2010: Added by Michael Goff

Sources 

  • Mike Goff - michael [dot] goff [at] hotmail [dot] com
  • Craig Philpott - craigphilpott63 [at] gmail [dot] com
  • Mike Lynch - lynch3212 [at] wavecable [dot] com
  • Royce and Bobette Haley - roycehaley111 [at] yahoo [dot] com

Comments 

Larkin Street Bridge
Posted January 16, 2011, by Anthony Dillon (spansaver [at] hotmail [dot] com)

Very peculiar looking rehab. It's looks almost as if they "applied" the old bridge over the top of a new structure. I would like to think there could have been a better way to keep the old structure intact, but perhaps this was the only alternative.

Larkin Street Bridge
Posted January 16, 2011, by Craig Philpott (cphilpott [at] puc [dot] edu)

This bridge of historic and engineering significance has been extensively reinforced in recent years. I found no data at bridge site to indicate the year of rehabilitation.

Larkin Street Bridge
Posted November 23, 2010, by Michael Goff (michael [dot] goff [at] odot [dot] state [dot] or [dot] us)

Craig here is a bridge for you to track down and photograph. It's another one of the John B. Leonard "Canticrete" bridges. Although I would love to photograph this structure, I have to admit that Monterey is a little outside my "within reason" geographic area.