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Section 816.113 Continued. <br />• area shall be seeded and planted, as contemporaneously as practicable <br />with the completion of backfilling and grading, with a temporary cover <br />of small grains, grasses, or legumes until a permanent cover is <br />established. <br />A considerable amount of published research exists describing the <br />best planting periods for northwest Colorado. Hull and co-workers <br />(1952) recommended that within the 6,000 to 8,000 foot elevation <br />zone, "rangeland seedings can be made with some assurance in early <br />April on well prepared seedbeds. Fall seedings made from the last <br />of August to November should be reasonably sure of success." <br />McGinnies (1960) reported that after 5 years of seeding trials on <br />rangelands, "the most reliabie seeding date for obtaining <br />statisfactory stands in Western Colorado is April 1." Fall <br />plantings that were planted by Energy Fuels late enough to <br />preclude fall germination were also successful. This study was <br />done on a sagebrush site near Crawford. Seeding and planting of <br />disturbed areas within the permit area will take place as soon <br />after April 1st as snow and mud conditions permit. Usually such <br />conditions abate by late May or early June and revegetation <br />begins. Snow and muc conditions perisit at this higher site <br />because of the predominantly north facing slopes. <br />If conditions preclude seeding with one of the permanent seed <br />mixtures within the same growing season as topsoil is applied, the <br />topsoil will be stabilized with the use of contour furrows. The <br />permanent seed mixture will be planted as soon as conditions allow. <br />Section 816.114 Revegetation: Mulching and other soil stabilizing <br />practices. <br />(a) Suitable mulch and other soil stabilizing practices shall be used <br />on all regraded and topsoiled areas to control erosion, promote germi- <br /> <br />816-148 Revised 04/10/87 <br />