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4 0540 Maxillllm Average Minimum yearly tt Total Diversion Purgatoire Water _.,.___.._." ____..~_...1ulr.:tL;!:9..DQ.i.ql1.\"I. diveNl"ion 100,000 1917 20,300 1920 If 81,000 10,700 tt 49,000 1919 2,150 1916 If From the preceding data it is evident that Purgatoire water diverted by the Amity Canal during the April to October period approximates ~ 13 percent of the average yearly diversion, and if the inclusion of Purgatoire winter flow (November to March) is added, the percent is raised to about 14. The above figures indicate a relatively small benefit received by Amity Canal from Purgatoire flow, which fact is explained by the following conditions: 1. Frequently when the Purgatoire River is in heavy flood, the Arkansas River is also in heavy flood, and the Amity demands are satisfied by Arkansas flood water from rains, t~e Purgatoire flow passing unused across the State line. 2. Purgatoire flood flows, in years other than those of heavy floods, are generally of an erratic character, consisting of extreme peak flows of short duration from rains on the plains area. Purgatoire flood flows range from several hundred second-feet to as high as 20,000 second-feet. Many of the Purgatoire floods are only of several days' duration; consequently, the Amity Canal capacity permits of diversion of only slinll percents of the total flood flows. This statement is also true of diversions of Purgatoire water by other Color~do canals heading on the Arkansas below L"s Animas. Referring to the 12-year record of Amity Canal diversions from the Arkansas River (see up ), the following table 0 f maximum daily flows has been abstracted by years: ,t:-