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• (c) Subsidence Monitoring Program <br />(i) The monitoring program shall be designed to determine the commencement and <br />magnitude of subsidence movements which occur and shall include the following monitoring techniques: <br />minin . <br />(A) Monuments shall be installed and surveved prior to the commencement of <br />Bl Monuments shall be situated to appro rp iately monitor ground surface <br />movement, vertical and horizontal, within the area proposed to be undermined, including an area to accommodate <br />the predicted angle-of--draw. <br />(Cl The orientation. location, and elevation of each structure within the Hermit <br />and adjacent area shall be monitored. <br />(Dl Monitorine of established monuments and structures shall be performed at least quarterly. commencing <br />one month prior to the initiation of mining beneath any established monument or structure. <br />r1 <br />L J <br />• <br />PR 03-06 2.05-184.10 05/07/03 <br />