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<br />i <br />Larry Oehler <br />- 11 - <br />• <br />The Division recommends that a non-competitive annual or b' <br />crop be seeded in the forest community "isiands" during the <br />years of reclamation. Then Arizona Fescue and Mountain Mul <br />interseeded at a reduced rate during the 3rd year. This pi <br />reduce erosion between seedlings, promote soil development, <br />seedlings several growing seasons to developing their deep <br />before competing with the shallow rooted native grasses. <br />5. Mulch <br />April 4, 1990 <br />ennial cover <br />first 2-3 <br />ly can be <br />actice will <br />and allow the <br />r root systems <br />Reclamation Resources states that mulching and protection against wind <br />and water erosion are not needed because of the absorptive <br />characteristics of the gravely soils. <br />The Division disagrees with this statement for the follows g reasons. <br />A. The climate in Park County is semi-arid. <br />B. Afternoon rains occur on a daily basis throughout the s inner. <br />C. The site elevation is 10,400 feet .... therefore, Burin the growing <br />season wide temperature variations at the soil surface re expected. <br />D. Evaporative losses will occur during application of irrigation waters. <br />The Division recommends the application of two (2) tons per acre native <br />-: hay mulch or crimped straw mulch and use of a protective bi degradable <br />netting over seeded areas to minimize erosion and evaporati nand to <br />promote revegetative success at the Alma Placer. <br />6. Irrigation Water - Source <br />Reclamation Resources has indicated that the source of irri~ <br />to be used during reclamation is the Columbia Ditch. Pleas <br />the required water rights will be secured prior to reclamat <br />Alma Placer. <br />Exhibit G - Hydrology <br />Winter Freeze Up - Spring Thaw <br />The applicant has mentioned in Exhibit K -Climate that the anti <br />working season for digging gravels extends from mid-April until r. <br />and the freezing up of the water supply determines how long into <br />processing plant can operate. <br />Please address the water management system and plans for shut-dog <br />winter months. Reclamation Resources should address how spring <br />ground water recharge within the disturbed area will be handled <br />designed storage capacity of the recirculation ponds be availably <br />mid-April? When will the recirculation ponds begin operation? <br />recommends that the recirculation ponds be partially drained or <br />to fall shut-down. This procedure should minimize the potential <br />overflow during spring snowmelt. <br />ation water <br />verify that <br />on at the <br />ipated <br />id-November <br />the fall the <br />i during the <br />iowmelt and <br />Will the <br />in <br />~e Division <br />iptied prior <br />`or pond <br />TAS/yjb <br />cc: Steve Renner <br />John Doerfer 5700E <br />