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<br />. <br /> <br />. <br /> <br />. <br /> <br />,,:, :,:; J'"l <br />U\1UV ..... <br /> <br />Page 10 <br /> <br />4.0 SUMMARY <br /> <br />The Leadville Limestone aquifer in the Glenwood Springs area is a classical, high permeability, <br />confined, structural aquifer, with the additional features of being warm and saline. The <br />Colorado River in the vicinity of Glenwood Springs is receiving tremendous volumes of saline <br />water as a result of structural and elevation controls. Since this is a major discharge area for <br />the aquifer, essentially all of the water contained within the Leadville in this area reaches the <br />surface. However, sufficient confinement in portions of the area results in artesian flows when <br />encountered in wells. <br /> <br />Specific conclusions as a result of the various investigations and testing are as follows: <br /> <br />1. The Redstone well is completed within the bedrock aquifer (Leadville Limestone) which <br />is the source for all thermal saline water discharging in the Glenwood Springs area. <br /> <br />2. <br /> <br />The Glenwood Springs area is the discharge area for this portion of the Leadville <br />Limestone aquifer. <br /> <br />3. The Leadville Limestone is the primary conduit for the thermal saline water, but the <br />Eagle Valley Evaporite is the source of the relatively high salinity. <br /> <br />4. Discharge from the Redstone well instantaneously reduces natural flow from identified <br />nearby springs. Flow from unidentified sources which discharge directly to the river is <br />also probably reduced, as a result of the Redstone well. <br /> <br />The latter conclusion is based on the observation that a finite volume of water is <br />ultimately discharged in the Glenwood Springs area, and flow from the Redstone well <br />represents a relatively large percentage of that flow (20 to 30 %). Therefore, when the <br />Redstone well is allowed to flow, water which would otherwise be available to discharge <br />at other points along the river is diverted to the Redstone well. This view is consistent <br />with the hydraulics of a confmed system of this nature. A flowing Redstone well <br />represents a significant enough pressure-drop in the aquifer to change the natural pressure <br />gradients in the aquifer towards the well and away from the nearby natural springs. <br /> <br />Michael J. Galloway <br />Consulting Hydroge%gisl <br /> <br />Projecl1016 <br />