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Oxbow Mining WWTF Water Quality Assessment CO-0000132 <br />Figure A-1 <br />Study Area <br />DELTA <br />Elk <br />Sanborn Creek <br />LLC <br />Beazdoal ' I~ USGS <br />Outfa11001 - 09132500 <br />Coal Outfalls <br />LEGEND <br />State <br />- County <br />)~ Lake/Pond/Ocean <br />- Street <br />Expressway <br />Highwey <br />C for <br />~ Stream <br />Military Area <br />National Park <br />Other Park <br />~ City <br />County <br />onnec 0 1 2 3 4 mi <br />Scale 1:114291 i 5 <br />*a~era~e-true scale depentls on monitor resolution <br />Paonia <br />of the <br />Source: US Census <br />TIGER Mapping Service <br />Based on WQCD general approaches, there are no discharges composed entirely of surface runoff <br />water evaluated in this assessment. This is because automatic dischazges of surface runoffwater will <br />not occur during periods of critical low flow as surface runoff water only occurs during precipitation <br />events, and any manual releases of surface runoff water dischazges from ponds will be required to <br />meet the assimilative capacities set forth in this WQA. <br />The ratio of the low flow of Sanborn Creek and Elk Creek to the Oxbow Mining, LLC WWTF <br />design flow is 0:1. No other facilities dischazge to these receiving waters, thus no other upstream or <br />downstream facilities had an impact on the assimilative capacities available to the Oxbow Mining, <br />LLC WWTF. However, due to lack of available dilution, analyses indicate that assimilative <br />capacities aze extremely limited. <br />According to discussions with a representative from the State of Colorado's Division of Water <br />Resources, Division N in Montrose, Sanborn Creek and Elk Creek have a low flow of zero. <br />Appendix A Page 2 of 10 Draft <br />