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Chapter 1 <br />Purpose and Need <br />per pad. Associated temporary road building acres <br />assume a 30-foot average disturbance width for a <br />temporary road with a 14-foot running surface. It <br />is assumed that any exploration drilling and <br />groundwater monitoring drill pads and access road <br />construction would utilize the same locations as <br />those used for methane drainage wells. <br />Subsidence and hydrology monitoring may require <br />placement of monitoring devices on the land <br />surface. These may include small subsidence <br />monuments, survey markers, stream gages, flumes, <br />etc. Access to the facilities may require motorized <br />vehicles that would use the system of existing <br />roads. <br />One additional mine ventilation facility (i.e., shaft) <br />may be needed during the life of the lease and may <br />include associated road construction. <br />At the leasing stage, it is not possible [o locate site- <br />specific areas where potential post-lease surface <br />uses may occur; therefore, the surface use and <br />disturbance estimations will be used to aid the <br />effects analysis and cumulative impact analysis <br />discussed in each resource section in Chapter 3. If <br />surface uses are proposed during the life of the <br />lease (if it is issued), site-specific proposals would <br />be made based on the surface use stipulations on the <br />lease and NEPA analysis completed at that time. <br />Dry Fork Lease-lay-Application DEIS ~-9 <br />