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2. Both the initial sad modified designs contemplated a terraced <--~, disposal site. Based upon experience at other sites is ~'~`'~ Colorado, terraces tend to concentrate runoff, resulting is increased erosion, downcutting of channels and associated maintenance work. 3. The modified embanl®eat design submitted is 1983 contemplated intermediate embanl®eat slopes between terraces at 1.7 hori- zontal to 1 vertical. Slopes o! this magnitude present several problems with respect to refuse disposal, dralaage control sad reclamation. First, it is nearly impossible to operate nay type of equipment oa such steep slopes, making it very difficult to conduct refuse placement, compaction and final grading. Secondly, elopes o! this magnitude are susceptible to significant erosion, and because the elopes aze too steep to accommodate heavy equipment, erosional features which develop aze very difficult to repair. Slopes o! this magnitude aze almost impossible to reclaim because it ie difficult to conduct overburden replacement, topsoil ~_``' re lacement and rave etatlon activities. Finall p g y, successful revegetation on elopes o! this grade would be very difficult to achieve. 4. The drainage control plan contemplated under both previous designs includes collection of all drainage from the refuse disposal area via the terraces, sad concentrating it within small ditches located around the perimeter o! the refuse disposal sits. Thin method of drainage control tends to coriceatrate all drainage in very limited areas, which results in significant erosion, downcuttiag, required ditch maia- tenanet, and excessive sadimeat delivery to sediment pond and sediment control structures. 1987 Revised DesiAa The revised design presented here should alleviate moat, if not ~~; all, environmental problems rhieh have been experieaeed on the ~.J. ~~? Revised 1/88