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Rill and Gully Plan <br />Introduction <br />On July 8, 1985, the Colorado Mined Land Reclamation Division (CMLRD) <br />issued guidelines pertaining to the "Division's Policy on the Ftanagement of <br />Rills and Gullies". The following rill and gully plan addresses concerns <br />expressed by the Division, t•lost of the material presented are part of <br />previously approved submittals. As indicated in the guidelines, the <br />Givision has recognized two scenarios in the field assessment of rill and <br />gully formation: <br />1) Excessive Rill and Gully Formation on Reclaimed Areas <br />2) Permanent Gully Formation <br />The first scenario primarily addresses excessive rill and gully <br />formation on reclaimed lands where the formation of such are not part of the <br />permanent drainageways. As stated in guidelines, if "excessive" rilling and <br />• gullying occurs, the affected area must be reclaimed utilizing approved <br />methodologies as presented in the operators reclamation plan. Such repair <br />techniques should minimize disturbance of existing established vegetation <br />and stabilize the gully head. Along with this concept, conditions may exist <br />where repair work may need to be delayed to "minimize adverse impacts of the <br />remedial action". <br />The second scenario involves the existence of permanent gullies <br />{permanent drainageviays). Guidelines presented by the Division indicate <br />gullies in excess of nine inches on reclaimed lands are allowable if the <br />operator demonstrates "that rilling and gullying is a natural geomorphic <br />process in the area of the mine". Such demonstration would be based on the <br />density of gullies in the premine area or the existing density within a <br />similar, undisturbed area. The density of gullies on the reclaimed land <br />must be compatible with the post mining land use. Additionzlly, the <br />operator must maintain, stabilize, and manage the gullies with approved <br />methodologies which are included in the reclamation plan. <br />• <br />28-1 <br />