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• <br />• <br />• <br />spring /early summer. Some Outfalls (005, 009, and 011) may go an entire year without <br />flowing. Surface water flow statistics for receiving streams (see Item 32) have also been <br />provided in this attachment on a separate page <br />11 and 12: Four 8.5 x 11 inch maps have been included: a general location map (that also <br />shows stream sampling sites) and one map for each of the three mine sites that show <br />permit boundaries and discharge outfalls. Additional details may be found on the large <br />maps the Division should have on file already from a previous permit renewal (November <br />1996). They are: <br />Seneca 11: <br />Exhibit 7 -2, Hydrology Monitoring Sites <br />Exhibit 7 -7, Surface Hydrology Map <br />Exhibit 12 -1, Operations Plan <br />Seneca 11W: <br />Exhibit 7 -1, Hydrology Monitoring Map <br />Exhibit 12 -2, Operations Plan <br />Exhibit 13 -2, Surface Hydrology Map <br />Yoast: <br />Exhibit 7 -1, Hydrology Monitoring Sites <br />Exhibit 12 -1, Operations Plan <br />Exhibit 13 -3, Surface Water Control Plan <br />13: The water balance diagrams are shown on Figures 2A to 2D. All values are averages <br />from the past fives years. Flow values for all outfalls are averages of weekly or monthly <br />measurements. Flow values for Grassy, Sage, and Dry Creek are averages of monthly <br />measurements, March to October. The flow value for Fish Creek is the average of <br />monthly measurements, May to September. <br />14: a) CDRMS Permits: <br />Seneca II: C -80 -005 (1980) <br />Seneca 11W: C -82 -057 (1982) <br />Yoast: C -94 -082 (1994) <br />b) Surface coal mines are covered under the nationwide general Permit No. <br />21 <br />c) Stormwater permit is incorporated into the discharge permit CO- 0000221. <br />d) Colo. State Air Pollution Emission Permits: <br />All three following permits have been left to expire as coal mining is no <br />longer performed. <br />