From the 1896 to 1911 the Glen Iris Estate was faced with a plan to create a dam to the south at Portageville. Below are drawings from the a 1906 project report. For more information on this project, see our Glimpse entitled Glen Iris Threatened and the Portageville Dam Maps
Image
above Report on Flood Conditions in the Genesee River,
by Edwin Fisher, 1937
Inages below from Genesee River Storage & Power Studies,
State Water Supply Commission, 1908