East side excavation, looking down on "Ice Dam" gorge - frozen retaining wall is between ice plant buildings and derrick in center foreground. East end of 1024 el. trestle at extreme right, Wakefield pile cofferdam at river edge, with downstream cross-river cofferdam under construction at its right.
Description
This image provides a birds eye view of excavation behind the east cofferdam that muck flow continually plagued until the refrigeration of the muck flow to allow excavation and grouting.
To order a reproduction please see: http://www.libraries.wsu.edu/masc/ , or contact Washington State University Libraries, Manuscripts, Archives, and Special Collections: (509) 335-6691.
