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May 11, 2011 Page 16 <br />4.12.2 Brick /Masonry Low Rise Structure Monitoring Plan <br />plan: <br />To ensure that the control plan is effective, AAI recommends the following monitoring <br />• Accurate location and elevation information of the buildings must be collected prior to <br />mining. <br />• The owner(s) /dweller(s) of these buildings should be informed as room - and - pillar <br />development approaches and data generated during monitoring should be shared with <br />them. <br />• At least two appropriately positioned survey monuments each should be established <br />around the school and church. Similar monuments should be established around other <br />brick/masonry buildings. <br />• Annual surveys should be conducted for the operating life of each structure. <br />• Structural anomalies reported by the surface owner(s) will be investigated. <br />4.12.3 Worst Possible Consequences of Damage to Brick/Masonry Low Rise Structures <br />Subsidence - induced damages to brick/masonry walled low rise structures may be <br />classified into three categories, architectural, functional and structural, depending on the levels of <br />ground disturbance. Architectural damage may mean small cracks in the plaster and sticking of <br />doors and windows. Functional damage could bring about instability of some structural <br />elements, e.g., jammed doors and/or windows, broken window panes, and restricted building <br />services. Structural damage may render the structure unsafe for habitation, and possibly lead to <br />collapse, requiring complete rebuilding or restoration. <br />4.12.4 Brick/Masonry Low Rise Structure Damage Mitigation Plan <br />In case monitoring indicates onset of damage or potential for damage to brick/masonry <br />low rise structures, the following mitigation plan should be adopted. <br />• Appropriate personnel at mine and regulatory authorities, as well as the owner(s) of the <br />building, should be informed in case anomalies are observed that may indicate an <br />affected building. <br />• Remedial techniques such as trenching, shoring, and structural reinforcement should be <br />applied to restrict further damage to the structures. <br />• The room - and - pillar development plan should be re- evaluated to ensure that operations <br />will not further damage the structure in question. <br />4.13 Timber Frame Buildings <br />4.13.1 Timber Frame Building Subsidence Control Plan <br />Several structures on either side of SH 12 such as frame houses, sheds and/or pens, <br />greenhouses, garages, barns and log frame cabins were classified as timber frame buildings. <br />Agapito Associates, Inc. <br />