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Mr. Dustin Czapla 11 <br /> CDRMS <br /> September 24,2021 <br /> open to the environment and intended to contain designated chemicals or acid mine <br /> drainage, and demonstrate that the amount of evaporation required to maintain <br /> reserve facility capacity will occur, or that there is sufficient reserve capacity to <br /> compensate for the uncertainty associated with the data. <br /> Response <br /> See response to Request#19. <br /> 19. Rule 6.4.21 EXHIBIT U — Environmental Protection Plan - Climate <br /> Pursuant to Rule 6.4.21 (13)(b) provide the following information regarding climatic <br /> factors (data may be provided from existing stations within the vicinity of the Permit <br /> area): <br /> (i) the mean annual precipitation for a minimum of five (5) years and, where <br /> available, one set of data for the wettest year on record for the area; <br /> (ii) the average direction and velocity of the prevailing winds; <br /> (iii) the mean monthly temperature and temperature ranges for a minimum of five <br /> (5) years; <br /> (iv) site-specific evaporation and sublimation rates for the proposed site. <br /> Response <br /> General climatic information is presented in Section 12 Rule 6.4.11 Exhibit I. <br /> In summary: <br /> Period between 1981-2010 Station (0548884) Leadville Airport <br /> • The average maximum temperature is 32.71 F (See attached Appendix 11-1) <br /> • The average minimum temperature ii 13.40 F (See attached Appendix 11-1) <br /> • The average total precipitation is 12.78 inches (See attached Appendix 11-1) <br /> • Wind speed and direction characteristics is summarized in (attached Appendix 11-1) <br /> • The maximum monthly precipitation is 1.75 inches recorded in 1973 (See attached <br /> Appendix 11-1) <br /> • The maximum daily precipitation (rainfall) of 0.5 inches was recorded in 1958 (See <br /> attached Appendix 11-1 period of record between 1948 and 2012) <br /> • The monthly total precipitation between 1948 and 1982 is summarized in attached <br /> Appendix 11-2 <br /> • Evapotranspiration rates for Lake County are estimated to range between 12-16 inches, <br /> (Figure 11-1, attached) <br /> • Solar radiation is summarized in attached Appendix 11-1 <br /> Calculating evaporation and sublimation is defined using Colorado Division of Water Resources <br /> specified method (See Depletion Analysis Below). <br /> Estimation of Evapotranspiration Across the Conterminous United States using Regression with Climate and Land <br /> Cover Data, February 2013—Journal of American Water Resources Association <br />