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Mogul Mine Bulkhead <br />Certification Report <br />Page 5 <br />Monitoring <br />No monitoring of pressure levels or water quality behind the bulkhead was required. The <br />pressure gage was read on three occasions, at 2 week intervals following closure of the <br />valve with the following results: <br />2 weeks 17 psi <br />4 weeks 24 psi <br />6 weeks 30 psi <br />The Mogul No. 1 Level bulkhead construction meets or exceeds all design specifications. <br />. _ <br />; <br /> <br />~..`, . ..r <br />~, <br />.~ <br /> <br />Sincerely ,; <br />, <br />-_ . <br /> <br />/ ~ cat/` <br />tep en C. Fearn .E. <br />Colorado Registration #11244 <br />