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<br />p <br /> <br />J. .' <br /> <br />. <br /> <br />. <br /> <br />\, v <br /> <br />they may have formed in response to forces and conditions slightly <br />different than those responsible for the other sinkholes. These <br />sinl<.holes may have been created solely in response to soil particles <br />being transported by seepage of reservoir water into the natural <br />foundation materials. Preferred seepage paths may e)(ist in the <br />foundation materials due to stratigraphic differences, localized <br />faulting, and areal joint and fracture patterns. Seepage in these <br />features may vary as a function of time due to the plugging and <br />unplugging of voids with transported material and the dissolution of <br />pOSSible soluble strata and/or joint filling materials such as calcium <br />carbonate and gypsum. <br /> <br />The investigation and design program is structured to provide much <br />of the data and a preliminary remedial design early in the proposed <br />schedule. SRK intends to submit the remedial design, including the <br />recommended outlet works upgrading alternative, as it is developed to <br />the Dam Safety and Design Review branches of the Colorado Department of <br />Natural Resources to facilitate rapid review and approval, and early <br />refilling of the reservoir. With the cooperation of these agencies, we <br />believe that the engineering investigation and design work can be <br />completed sufficiently early to allow final remedial construction to <br />start in August of 1987 and finish in time for reservoir filling prior <br />to the 1988 irrigation season. In addition, SRK will make a concerted <br />effort to complete critical portions of the study sufficiently early to <br />allow partial remedial construction prior to the 1987 irrigation season. <br />The partial remediation program will likely address only those dam <br />I <br />safety issues related directly to the e)(isting voids around the outlet <br />structure and the connected sinl<.holes. Initiation of remedial <br />construction work at this stage of the study is also predicated of <br />course on the availability of construction/construction monitoring funds <br />and approval of the remedial desi9n by the Office of the State Engineer <br />and the Colorado Water Conservation Board. If the phase one remediation <br />program is completed within the'requisite time period, the Office of the <br />State Engineer will be petitioned to approve temporary water storage in <br />Gurley Reservoir during the 1987 irrigation season while the remainder <br />of the study is being completed. <br /> <br />-2- <br />