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<br /> <br /> <br />flowing down to the base of the slopes and possibly into the creek, but this could occur as a result of a very <br />wet spring runoff season or a thunderstorm/prolonged rain event during the summer months. Therefore, we <br />do not believe that failure of the debris slopes is imminent at this time; but could be imminent in the event <br />of a wet spring. If short-term protection of the creek is a concern, then we recommend mitigation measures <br />be enacted as soon as possible, since regrading work may be difficult or impossible during the wetter spring <br />months. <br />Based on the site conditions and the concerns of the property owner, we believe that the most feasible <br />alternative for stabilizing the debris flows is to remove the materials from the slopes. It appears that the <br />most feasible alternative for removing the material would be to push the material downslope to a staging <br />area located at the base of the steep slope. The material could then be loaded into trucks and transported to <br />a waste azea. <br />Reclamation of the debris flow slopes/disturbed areas and the waste materials azea should then include <br />shaping and grading to provide uniform surfaces and establish drainage and revegetation efforts. Placement <br />of erosion control matting on the steep reclaimed debris flow slopes is recommended to help limit erosion <br />and promote rapid revegetation. For the reclaimed and seeded debris flow azeas we recommend placement <br />of a wood fiber mat such as the Excelsior Curlex III mat. This mat should provide protection for between <br />18 and 24 months, which should be adequate to reestablish vegetative cover. In addition, we recommend <br />the placement of either a manufactured silt fence material or a straw-bale silt fence below the reclaimed <br />areas to provide siltation protection to the creek from runoff from the newly regraded slopes. <br />If you have any questions concerning this report or our recommendations, or if we may be of any further <br />service, please contact this office. <br />Sincerely, <br />NORTHWEST COLORADO CONSULTANTS, INC., <br />Harold N. Schlicht, P.E. _ <br />Reviewed by Brian D. Len, P.E. <br />xc: Tom Petri <br />Kent Whitener <br />• !ob Number. 03-5547 NWCC, Inc. paSe Z <br />