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Old Happy Isles Bridge

Photos 

North Face Of Bridge From East Bank. Retaining Wall And Gauging Station To Left

Photo taken for the Historic American Engineering Record

View photos at Library of Congress

BH Photo #224793

Map 

Description 

The Old Happy Isles Bridge is a locally-rare survivor of a concrete girder bridge in Yosemite National Park. Concrete girder bridges were the prevailing form of construction in the late 1910s and early 1920s.

-- Historic American Engineering Record

The Old Happy Isles Bridge was removed in 2001 due to damage caused by the 1997 flood and rock fall from Glacier Point.

Facts 

Overview
Concrete deck girder bridge over Merced River on Park Path
Location
Mariposa County, California
Status
Removed but not replaced
History
Built 1921, Removed 2001
Design
Concrete deck girder
Dimensions
Length of largest span: 57.8 ft.
Total length: 88.9 ft.
Deck width: 15.8 ft.
Approximate latitude, longitude
+37.73134, -119.55863   (decimal degrees)
37°43'53" N, 119°33'31" W   (degrees°minutes'seconds")
Approximate UTM coordinates
11/274522/4179089 (zone/easting/northing)
Quadrangle map:
Half Dome
Inventory number
BH 51215 (Bridgehunter.com ID)

Update Log 

  • February 6, 2012: Added by Michael Goff

Sources 

  • Mike Goff - michael [dot] goff [at] hotmail [dot] com
  • HAER CA-104 - Old Happy Isles Bridge, Spanning Merced River on service road, Yosemite Village, Mariposa County, CA