"1822 Placing concrete paving on the Upstream Cofferdam. December 20th, 1932.
1828 Site of Nevada Valve House, showing Construction Adit and 11-foot outlet tunnels. December 21st, 1932.
1786 Start of operations on driving of 18-foot Penstock adits from Diversion Tunnel No. 2, to Nevada Power House, showing Conway mucking machine removing muck. December 9th, 1932.
1787 Interior of Nevada Construction Adit, showing drill jumbo at completion of drilling for blast. December 9th, 1932."