Big Creek, Florence Lake Dam - Ward Tunnel Repairs - View of construction plant set-up of Grafe-Callahan and Gunther and Shirley Co., Contractors, at vertical shaft in Camp 61 Adit, for concrete and gunite repairs in Ward Tunnel. .
Southern California Edison Photographs and Negatives G. Haven Bishop (SCE) Southern California Edison Photographs and Negatives, Huntington Digital Library
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