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12. On approved page Z.O.i-90. in Section Z.O.i.6(6)(Jj(iii)(6). it is stated thcu "support <br />pillars wiN be leJi in place under Pond P-1 and near the outcrop. " Hniverer. ar <br />proposed revised pcrgc 2.0~-9?, "and near the outcrop "has been deleted %ronr this <br />sentence. Please ju.r[ifv this deletion as it relates to possible subsidence-induced <br />landslides and their effect on the pro[ection of irrigation di[ches and rocreLr irr Terror <br />Creek and H:rbbcu•d Creek. especially since the need for this limited extraction barrier <br />has been established, as slated on pages 26 and ~2 of E.rhibit 13. <br />The operator stated that revised pages 2.0~-97 and 2.0~-100 were submitted to clarify the <br />limited extraction barrier. However, only revised page 2.0~-100 was submitted. Please <br />submit revised page 2.0~-97. <br />13. In Section 2.0.5.6(3)(b)(iv), on proposed revised page 2.O.i-76, it is slated that there will <br />be downstream hydrologic monitoring of the Sheep Corral, Dove and Iron Poin[ Gzrlches. <br />Please explain why there will not be any upstream hydrologic monitoring of these <br />gulches, as is the case for the hydrologic monitoring of the other gulches in the permit <br />area. <br />The Division has no further concerns. The operator submitted revised page 2.05-76, <br />which indicates upstream hydrologic monitoring points are located in Sheep Corral and <br />Dove gulches. Iron Point Gulch does appeaz to be too faz north of mining to justify an <br />upstream monitoring station. <br />ADDITIONAL QUESTIONS OR COMMENTS <br />14. On proposed revised page 36 of Exhibit 1 S, it is stated that the results of any s:rbsidence- <br />related damage monitoring of stock ponds will be documented in the Annual Subsidence <br />and Hydrology Report. The Division requests that, in addition, the Division be notified <br />tivithin ten (IO) days if any subsidence-related pond damage is discovered Ijyou agree, <br />please revise page 36 of Exhibit 1 ~. <br />15. On proposed revised page 40 of Exhibit 1 S, it is stated that the results of any subsidence- <br />related damage monitoring of springs will be documented in the Annual Subsidence and <br />Hydrology Report. The Division requests that, in addition, the Division be notifred <br />within ten (10) days if any subsidence-related spring damage is discovered /f you agree, <br />please revise page 40 of Exhibit l.i. <br />l6. On proposed revised page 4~ of Exhibit 1 S, it is stated that persons using trails will be <br />informed of any known subsidence-related hazards. The Division requests that Botivie <br />post appropriate signs on roads and trails informing all users that a subsidence hazard <br />may exist. Ij you agree, please modify page 4~ of Exhibit l.i. <br />