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some 1,050 square miles in area, is primarily the water yielding area; while the lower basin, some 800 square miles in area, is the area of water use. Figure 1-1 is a map of the basin 'showing the upper and lower basins separated by a dotted line which intersects the Rive~ at the mouth of the canyon. The study examined such projects as ~ould be located on the main stem of the Cache la poudre River or its tributaries (i.e., the North ,or South Forks) upstream from Fort Collins. Although segments of the mainstem and South Fork are under study for possible inclusion in ithe national wild and scenic rivers system, those segments were not excluded from consideration for reservoir sites in this study. Likewise, the existence of designated wilderness areas was not taken as a constraint on the siting of potential reservoirs or any other potential project features. D. STUDY MANAGBIIKNT Pursuant to the proper statutory proqedures, the Colorado Water Conser- vation Board selected Tudor Engineering C9mpany to perform the study. Under the general guidance of the Colorado Water Conservation Board's staff, Tudor was responsible for carrying out all aspects of the study and for the preparation of all necessary study documentation and reports. Final decisions concerning the scope and conduct of the study, the evaluation criteria employed at each stage of the study an~ the recommendations made at the conclusion of the study were the resppnsibility of the COlorado Water Conservation Board. . E. CONDUCT OF THE STUDY The study was conducted in two phases. In PhaEje I of the study, it was originally intended that four to six preliminary alternative projects would be selected for evaluation. Fourteen potential a~ternative projects were identified, evaluated and then screened down to .six preliminary alternative projects. As a result of discussion with the Advisory Committee and input I received during public meetings, two additional preliminary alternative projects were added for preliminary evc\luation. These eight preliminary alternative projects were analyzed and 'evaluated during Phase I of the study. The results of Phase I were presented in the "Interim Report on the Cache la Poudre Project Study" and an addendum to that report in July 1982. In the original scope of work, it was intended that one or two alternative projects would be selected for evaluation lat reconnaissance level in Phase II of the study. Following completion of Ph~se I, the decision of the Colorado Water Conservation Board was to investiga~e four alternative projects during Phase II of the study. The four selected alternative projects were analyzed and evaluated during Phase II of the study. The results of both Phase I and Phase II of the study are presented in thiEl report. The decision to investigate eight prel~minary alternative projects instead of four to six during Phase I and four al~ernative projects instead of one or two during Phase II negessitated changes ~n the scope of work for the study. The additional effort resulting from in~estigation of a greater number of 1-2 I I I I I I I I I I I I I I I I I I I