Old Happy Isles Bridge, Spanning Merced River on service road, Yosemite Village, Mariposa County, CA

part of Yosemite National Park Roads and Bridges Recording Project, 1991; see HAER No. CA-117 for overview
Significance: 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.
Unprocessed Field note material exists for this structure: N92
Unprocessed Field note material exists for this structure: N833
Survey number: HAER CA-104
Building/structure dates: 1921 Initial Construction