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XX. Concurrent Surface and Underground Mining- Rule 4.22 <br /> No concurrent surface and underground mining is planned for the permit renewal period. <br /> XXI. Auger Mining - Rule 4.23 <br /> No auger mining is currently proposed in the mine plan. However, auger mining was done in <br /> 1993 in the Section 11 Pit. Further, highwall mining in the East Pit, West Pit, South Taylor Pit, <br /> and Collom Pit has been approved (PAP, Section 4.23). <br /> XXII. Operations on Alluvial Valley Floors - Rule 4.24 <br /> The Permit was found to be in compliance with Rule 4.24. <br /> Information related to alluvial valley floors is found in Sections 2.04.7, 2.06.8 and 4.24; Exhibit <br /> 7; and Maps 7, 11, 11A, 1113, 11C, 12, 12A, 1213, 12C 17, 32 and 37 of the PAP. A detailed <br /> summary of alluvial valley floors identified during the original permitting of the Mine can be <br /> found in the original findings document. <br /> A. Designation of Alluvial Valley Floors <br /> Stream Valley Segments Determined to be Alluvial Valley Floors <br /> The Division has made the determination that portions of four drainages with segments in or <br /> adjacent to the permit area are considered alluvial valley floors: Good Spring Creek, Wilson <br /> Creek, Lower Elkhorn Creek, and Jubb Creek. These stream valleys are shown on Map I IA of <br /> the PAP. The following stream valley segments have been determined to be alluvial valley <br /> floors: <br /> • Good Spring Creek valley deposits mapped as Qa on Map I IA of the PAP, extending <br /> from the West Fork Good Spring Creek confluence downstream for the entire length of <br /> the valley. <br /> • Upper segment of Wilson Creek valley deposits mapped as Qa on Map I IA of the PAP, <br /> from the confluence of East and West Forks of Wilson Creek, downstream to the <br /> approximate center of Section 7, T3N, R93W. <br /> • Lower segment of Wilson Creek valley deposits mapped as Qa on Map I IA of the PAP, <br /> extending from lower boundary of"Area Affected by 1985 Erosion and Mass Wasting <br /> Event." <br /> • Lower Elkhorn Creek valley deposits mapped as Qa on Map I IA of the PAP. <br /> • Jubb Creek and its tributary valleys with deposits mapped as Qa on Map I IA of the PAP. <br /> Flood irrigation may have occurred in the past along portions of Wilson Creek within the permit <br /> area. Small cropland parcels within a mile or so to the north (downstream) of the permit <br /> Proposed Decision and Findings of Compliance January 5,2023 <br /> Permit Renewal No. 8 Page 157 <br />