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<br />b. Culverts YB-4, 5, and 6 have been enlarged due to the revised • <br />routing used in the mining area. <br />44. The runoff from the two drainages located between Culverts YA- <br />3 and YA-4 will be diverted away from the road fill. Riprap <br />will be placed at the base of both fill area slopes to divert <br />the water to Culvert YA-3. These two drainage areas were <br />included in ttie SEDCAD+ calculations f~~r the sizing of Culvert <br />YA-3, which will handle any flows from these drainages. <br />45. SCC has included in the narrative, a description of the <br />intersection ~~ccurring between a "dirt: road" and the proposed <br />Road A at St~ition 74+25. This "dirt road" and others are <br />similar to the County roads in the area. Approaches similar <br />to those along the tie-across haul road will be constructed on <br />the fill slopes of Road A and stop e:igns will be placed on <br />both sides of the haul road. Access will be maintained for <br />those people 'who utilize the "dirt road". <br />46. Exhibit 13-10.6 has been revised so th,st it does coincide with <br />Exhibit 13-1]..1. One error was th~it the elevations were <br />incorrect on the profile portion of the map. You should now <br />be able to match up the profile of Exhibit 13-10.6 with both <br />Exhibit 13-10.5 and 13-11.1. Also, the end of Road A on the <br />profile was not located properly. It has been moved to the <br />correct location. Station 161+03.17 on Exhibit 13-10.6 should • <br />be matched with Station 0+00 on Exhibit 13-11.1. <br />47. The landslide/mud flow area as depicted by CDMG, has not been <br />field verified at this time and, therefore, the stability <br />question cannot be assessed. In t:he interest of permit <br />submittal, the monitoring road has been removed from the map. <br />Mining is not being requested in the area of the CDMG noted <br />slide location and, therefore, should not present any <br />problems. <br />48. Northwest Colorado Consultants (NWCC)~were retained to conduct <br />a geotechnical investigation of both the proposed haul road <br />and the main sediment pond (Pond 0:10). This information <br />gathered was primarily intended for SCC design use. It was <br />submitted to the Division to comply with Regulation No. <br />4.03.1(1)(3) and to provide information to the Division <br />regarding the sections pertaining to cut and fill slopes. <br />The geotechni~~al report is presented a~~cording to the standard <br />of practice. The data, material px•operties, and analysis <br />appear to be correct. The geotechnical field investigations <br />and soil laboratory tests were conducted to provide SCC with <br />adequate soil characterization to verify the proposed <br />structures could be constructed with adequate safety factors <br />and would be: stable. The results of this geotechnical <br />investigation show this is the case. • <br />10 <br />