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<br /> <br />Mr. Steve O'Brian - 3 - August 29, 1985 <br />4. Will "undesirable" soils, i.e., Louviers cobbly clay loam, the highly <br />calcareous horizons of the Kutch clay loam, and gravelly and clayey mine <br />soils, be incorporated into and buried with overburden? <br />5. Please explain what is meant by "discarding of most of the Louviers cobbly <br />clay loam." <br />6. The soils information provided in Exhibit I indicates that mining will not <br />occur on the entire 1,364 acres proposed to be permitted. <br />Please discuss which areas will "likely be disturbed for clay mining." <br />Please delineate the potential affected land on the mining plan map <br />(Exhibit D-1). <br />7. From where will water be obtained for dust control? <br />Exhibit E -Reclamation Plan <br />1. A) How was the overburden volume calculated? Please provide <br />computations. <br />2. Reclaimed slopes should be no steeper than 3H: 1V to accomodate grazing in <br />the final land use (rangeland). Please commit to such. Permit M-78-009, <br />"Apache 9 Clay Pit," commits to final reclaimed slopes no steeper than <br />4H:1V. The reclamation map provided with the conversion/amendment <br />illustrates the final contour of these slopes to be 2.5H:1V. Please <br />commit to grading these slopes no steeper than 3H:1V. <br />3. In addition to providing micro-environments which may create conditions to <br />"enhance" vegetative establishment and growth (decreased soil evaporation, <br />temperature, etc.), mulching provides a source of ground cover to aid in <br />the prevention of soil erosion. ~If wind and water erosion are evident on <br />reclaimed slopes prior to vegetation establishments, mulching should be <br />employed ' <br />A field trial better documents the performance of mulch in relation to <br />revegetation success than does speculation: <br />4. Sideoats grama should be included, and the seeding rates of Intermediate <br />and Pubescent wheatgrass reduced in the revegetation seed mix to balance <br />the composition of cool-season and warm-season grass species. Blue grama <br />has illustrated poor seeding establishment when ideal conditions are not <br />present. <br />