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<br />40'06'N <br />40°04'N <br />40.02'N <br />40% <br />39°58' <br />Simulated Effects of Land-Use Change and Aggregate Mining on Groundwater Flow <br />i?I?-3'""? a?" `.?5'. fi' ??' ?' fir •, <br />EXPLANATION <br />Lined pit <br />® Unlined pit <br />Fines-backfilled pit <br />- Wetland mapped as part of this study <br />- Riparian herbaceous vegetation indicated by <br />Colorado Division of Wildlife (2007a, b) <br />Simulated groundwater-level change, in feet <br />Positive values indicate groundwater-level rise. <br />Negative values indicate groundwater-level decline. <br />_ 8 to 10 <br />6to8 <br />_ 4to6 <br />2to4 <br />O -2 to -2 <br />-4 to -2 <br />-6 to -4 <br />-8 to -6 <br />® -10 to -8 <br />Limit of simulated aquifer <br />0 5,000 10,000 FEET <br />0 1,000 2,000 3,000 METERS <br />73 <br />Figure 36. Simulation 4-Groundwater-level changes in 2055 resulting from the potential extent of <br />reclaimed aggregate pits in 2040, Brighton to Fort Lupton, Colorado. Pits added after 2020 are simulated as <br />lined. <br />Sueams modified from it S. Geological Survey National <br />Hydrograpby Dataset; 1:100,000 <br />Roads modified from Colorado Department of Transportation <br />North American Datum of 1983