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C a <br />r ? <br /> <br />40°06'N <br />40*04'N <br />40'02'N <br />40'N <br />39'59'N <br />EXPLANATION <br />Lined pit <br />t Unlined pit <br />Flats-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 />_ St. 10 <br />_ 6to8 <br />_ 4 to 6 <br />2 to 4 <br />-2 to -2 <br />l? -4 to -2 <br />-6(o-4 <br />® -8 to -6 <br />- -10to-8 <br />Limit of simulated aquifer <br />0 5A0 10,000 FEET <br />i I I I I I I I I-I I <br />0 1,000 2,000 3,000 METERS <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 />Simulated Effects of Land-Use Change and Aggregate Mining on Groundwater Flow <br />73 <br />Streams modified from U S. Geological Survey National <br />Hydrography Dataset; 1:100,000 <br />Roads modified from Colorado Department of Transportation <br />North American Datum of 1983