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106 22'30" 105 30' <br />° ° <br />EXPLANATION <br />SAG.5 <br />Confined-aquifer network <br /> well and name <br />SAG.12 <br /> Well logged for this study <br />Approximate boundary <br /> Well not logged for this <br />of uppermost confining <br />SAG.15 <br /> study <br />clay layer (Emery and <br />others, 1973) <br />SAG.3 <br />Moffat <br />SAG.12 <br />SAG.18 <br />CUSTER <br />SAG.13 <br />SAGUACHE <br />SAG.8 <br />SAG.14 <br />SAG.10 <br />Boundary of <br />SAG.2 <br />37 52'30" <br />° <br />San Luis <br />SAG.6 <br />SAG.9 <br />SAG.4 <br />valley fill <br />SAG.15 <br />SAG.11 <br />SAG.1 <br />SAG.17 <br />Center <br />Hooper <br />SAG.7 <br />ALA.5 <br />ALA.2 <br />Del Norte <br />ALA.3 <br />ALAMOSA <br />RIO.3 <br />ALA.13 <br />Monte <br />Vista <br />RIO.4 <br />RIO <br />ALA.10 <br />ALA.14 <br />ALA.16 <br />ALA.15 <br />GRANDE <br />RIO.2 <br />ALA.11 <br />ALA.12 <br />RIO.1 <br />Alamosa <br />ALA.9 <br />Blanca <br />ALA.8 <br />ALA.4 <br />Fort Garland <br />ALA.6 <br />ALA.17 <br />37 22'30" <br />° <br />ALA.7 <br />COS.1 <br />CON.2 <br />La Jara <br />CON.1 <br />CONEJOS <br />CON.4 <br />COSTILLA <br />Sanford <br />CON.3 <br />Romeo <br />Manassa <br />Roads and cities from Colorado Department of Transportation, 1998 <br />Geology from U.S. Geological Survey 1:500,000, 1965 <br />05101520 MILES <br />Confining layer from U.S. Geological Survey 1:500,000, 1973 <br />Colorado Albers projection <br />05101520 KILOMETERS <br />COLORADO <br />Study area <br />Figure 1 . Location of study area and confined-aquifer network wells. <br />2Geophysical Logging to Determine Construction, Contributing Zones, and Appropriate Use of Water Levels Measured in <br />Confined-Aquifer Network Wells, San Luis Valley, Colorado, 1998?2000 <br />