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Oob Liddlc -2- October 27, 1981 <br />type of mining will be conducted within these designated envelopes. <br />Application should be arncnrlcd to rler.cribe in Beta. 1 r.xactly what mining plan <br />and techniques wi.1l be utili ud within the limited extraction envelopes. <br />(4) Section 4.6.1.5.9 "Subsidence Monitoring Program" <br />'fhe utilization of the U.O.P. research monitoring grid is acceptable, <br />but not adequate to fu]fill the rcr/uircments oC State regulations. (Rule <br />2.OS.G(E)(c)) In addition l.o the rnonitor.inq proycam to be conducted above the <br />lonywall test panels, the applicant is responsible for verifying the <br />contention that the limited extraction plan will prevent material damage <br />within the designated limited mining envelopes. A simplistic monumentation <br />plan should be developed to~'verify that County Road 108, the conveyor adjacent <br />to that road, and the undermined portions of ]diddle Thompson and florth <br />Thompson Creeks are not materially damayed. because the applicant projects <br />no surface subsidence at the location of any of these structures or renew- <br />able resource lands, a simplistic monument capable of observing vertical <br />movement should suffice at these locations. The applicant should amend the <br />submittal and hlap A and Mop II to indicate additional proposed survey monuments. <br />/mt <br />cc: Jim Xent <br />