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3. Use of Natural Drainages as Part_ of Sediment Control <br />System <br />After the May 1993 storm exceeding Rule 4 requirements, <br />these drainages were scoured to bedrock and rendered <br />stable. The north drainage has had additional rock <br />handplaced in the small headcuts to enhance stability. <br />The south drainage is inaccessible due to steep <br />sideslopes and a narrow drainage bottom. However, due to <br />the predominance of rock outcrops and other geologic <br />control within this particular drainage, long term <br />stability is assured. No further work is anticipated <br />within these drainages. <br />4. Transition Points Between Ditches and Drainages <br />Where the ditch enters drainages, the ditch grade is <br />modified to blend smoothly into the natural drainage <br />where possible. During routine maintenance these <br />transition areas are checked and modifications are made <br />as necessary such as rock check dams, grading, etc. <br />5. Alternatives to Intercepting and Routing Numerous <br />Watersheds <br />The implementation of the Section 16 Pond serves to <br />reduce the size of the watershed serviced by the south <br />collection ditch and therefore will reduce the volume of <br />water flow occurring in that ditch. <br />6. Details on Diversion Ditch Reclamation <br />Dozers can be used to regrade virtually all of the ditch <br />with the exception of steep slopes. A track mounted <br />excavator can be used to regrade these limited areas <br />which are too steep for dozers to operate on safely. <br />A Caterpillar Model 312 Excavator could operate on the <br />ditch with an overall reach of approximately 37 feet. <br />The ditch would be graded to blend with the surrounding <br />topography. <br />The entire ditch would be left in a roughened condition <br />and broadcast seeded in the fall. <br />7. Stabilization Techniques For Cut and Fill Slopes <br />Slope stabilization is accomplished with vegetation. All <br />areas have previously been broadcast seeded and <br />stabilization is successful in areas not re-disturbed by <br />ditch maintenance. Where ditch maintenance occurs, <br />reseeding is accomplished in the fall. Maintenance and <br />reseeding is simply an ongoing process. <br />