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. " '. 01875 The results of the Corps of Engineers report, completed in 1953, were subsequently published in House Document 325. That Report considered five conditions of Reservoir operation: (a) Transfer of the storage decree of the Model Irrigation Company, for 20,000 acre-feet annually, from the present site to the proposed Trinidad Reservoir. (b) Storage in the Trinidad Reservoir of flood flows originating on the Purgatoire River above the dam site which would otherwise spill from John Martin Reservoir. (c) Storage in the Trinidad Reservoir of the winter flows of the Purgatoire River now diverted for winter irrigation of project lands. (d) Regulation in Trinidad Reservoir of summer flows historically diverted to project lands, provided that future streamflow records disclose that such further regulation would not materially increase depletions, or that any material increase in depletions be compen- sated by suitable replacement to lands served by John Martin Reservoir. (e) Storage in Trinidad Reservoir of all flood flows originating on the Purgatoire River above the damsite other than those specified in subparagraph (b) above; provided that suitable replacement is made to John Martin Reservoir to the extent that future streamflow records show that such storage in Trinidad Reservoir would result in depletion of the inflow of the Purgatoire River into John Martin Reservoir. Irrigation operation studies were presented in the Corps of Engineers report using a three condition analysis: (a), (b), and (c) only, and an alternate analysis with all five conditions. Review of the report by affected State and Federal agencies resulted in the recommendation that:- "The irrigation capacity of the Trinidad Reservoir be operated in accordance with operating conditions (a), (b), and (c) specified in the foregoing conclusions (Of the Bureau of Reclamation) until auch time as the feasibility of operating under conditions (d) and (e) has been demonstrated, at which time consideration be given to the full utilization of the irrigation capacity in accordance with five of the specified conditions." This recommendation was incorporatcd into House Document No. 325, 84th Congress, page 45. House Document 325, which, being the basis for project authorization, was also the basis for projact operation, which showed benefits for operating only under conditions (a), (b), and (c). The 55,000 acre-foot reservoir capacity used in the report, however, contained storage space to regulate water supply UDder conditions (d) and (e) also if it were feasible to do so. However, analysis of streamflow data, 2