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Final Draft - Preferred Storage Options Plan Southeastern Colorado Water Conservancy District June 8, 2000 Monitorin'{ of Water Quality Imvacts A major concern of the irrigators and municipalities in the Lower Basin has been, and continues to be, declining water quality primarily relating to elevated levels of total dissolved solids (salinity). Water exchanges, while operated to avoid injury relative to water quantity, are perceived to contribute to declining water quality in the Lower Basin. Despite the apparent lack of negative impacts on water quality (see Section 4.2), implementation of Fry-Ark Project re-operation, and/or any of the other storage options, should include a program of intensive water quality data collection and evaluation. This program should begin as soon as possible and continue throughout the initial 20 to 30 years of Project operations. This data base would serve to establish a pre-Project baseline and for taking corrective actions if water quality impacts are observed. Municival Outlet Cavacity at Pueblo Dam Pueblo Dam includes an outlet for municipal releases to the Pueblo Board of Water Works and for the Arkansas Valley entities east of Pueblo. Currently, releases from Pueblo Reservoir are being made to the river. Pueblo's municipal diversion is located downstream of the dam. The Pueblo Board of Water Works is planning to tap the outlet at the ~':In"I Thp 1"\11tlp.t ".:\1"'1"\ ;n,..h.f'1pc r<::l1"\'::If"';hr f'n,r Q n;1"\"",1;...,,,, tl"\ et'or1r"'" thp. "'::111"", p.nt;tl(3e ~ ..~. 'UO........ ........ ................. ............. ...""'................. ........t'.......ILJ .......... .... t'..t-".....u...... LV............... ..aH..., Y.........J .,n.uL.......... east of Pueblo; however, the pipeline termed the "Valley Pipeline" was authorized but not constructed. Although construction of this Valley Pipeline does not appear feasible at this time, any re-operation of storage in Pueblo Reservoir must not compromise delivery capacity from the dam that would be used to supply the Valley Pipeline. Other Overational Factors and Cost The re-operation of Fry-Ark Storage under Scenario B would also include the following provIsIOns: . Storage of Project water would take precedence over the storage of all non-Project water, including any non-Project water that may be in storage when Project water becomes available. . All allocations ofre-operation storage will be subject to approval of the District Board, consistent with the Allocation Principles and Operation Policies of the District. . There will be a cost associated with use of the re-operated storage space to be borne by the participating entities. tI> GEl Consultants, Inc. 3-8 J-\PR01ECTS\9906I\Repom\Preferred SOP Final wpd