The real significance of the Lower Klamath Lake levels are basically this:  Settlers from the Merrill-Tulelake areas hired J. Frank Adams to dike the Lost River Slough during the late 1890's.  They did this to prevent flooding that had occurred from massive inflows into Lost River from Upper Klamath Lake via the Lost River Slough.  With the dike in place, Upper Klamath Lake lost one of the natural outlets in the form of the Lost River Slough.  The excess water could now go only out of Lake Ewauna and into the Klamath River as the Lost River Slough was blocked.  Lower Klamath Lake levels were largely influenced by the amount of water in the Klamath River below Lake Ewauna.  It should not be too difficult to look at the map and see that there was likely a vast amount of water flowing over the reef at Keno in 1905.  This was also the year Hardy chose to begin his "flow study".  The point here is that we just do not know how much of the record high levels of water present in Lower Klamath Lake in 1905 would not have been there if the Lost River Slough had not been not blocked.  Some of it would have gone through Lost River Slough to Lost River and on to Tule Lake and would not have been present to contribute un-naturally high Lower Klamath Lake levels and Klamath River flows.