Laserfiche WebLink
ry~c~%~ <br />Exhibit Page 61 • Mq,~ @a <br />2 <br />Addendum A to Attachment 1 TO EXHIBITS ~~%8,~ °~a 1?0 <br />00 '~ ~ 0~ <br />As requested by the Division, an analysis of potential slope failure along the western boundary of t~~e~~o'Cy <br />affected area, and discussion of any potential impact on significant, valuable, or permanent manmade ~ ke <br />structures located within 200 feet of the permit boundary is provided herein. Ceo <br />/~ <br />At the same time, we are obtaining compensation agreements with the owners of these structures, and <br />will submit copies as those are obtained. <br />The earth and deposit into which the headwall is being cut is sand and gravel mixed with some clay, and is <br />not bedded to any significant degree. Assuming worse case, the material will be saturated. Therefore, <br />the worst case angle of repose from the Caterpillar Performance Handbook, 2.8 to 1, is assumed. For a <br />twenty-foot high headwall or working face, therefore, the potential plane of failure is from the toe of the <br />working face to a point about 56 feet behind the working face (it will vary somewhat due to slope). This <br />places the failure at least 12 feet from the nearest structure, the Home Ditch (inside the permit boundary), <br />and at least 35 feet from all other structures, including phone line (underground), fence, powerline poles <br />(overhead), and Colorado Highway 145 with all auxiliaries (culverts, signs, shoulder, etc.) <br />7250 <br />Drawing Detail Cross-Section scale As shown 2V:1 H Nonni <br />Title <br />Source Plan "Linecamp2.dwg" Permit No. M-2001-001 Drawn by NAB <br />of Map & Name Line Cam Plt Checked by NAB <br />Legend As labeled. Ref Exhibit E. File No. S-1-A1 <br />Rev 15MAR01 <br />The potential slope in case of slope failure (worst case) is shown for both slip and cylindrical <br />failure; the back of the failure is approximately 12 feet from the Home Ditch and 35 feet from <br />the fence line (the nearest permanent structure not inside the permit boundary). The slope of <br />2.SH:1V (obtained from the Caterpillar Performance Handbook) is for saturated sand and <br />gravel. After reclamation, the reclaimed slope will be 1V:4H, or less than the angle of repose. <br />Due to the loading of the stockpile, cylindrical failure is very unlikely to occur before plane <br />failure. <br /> T uck <br />- ,~ <br />w e ~ ` <br />7240 mo Sto k le <br />723 ~e <br /> Hwy 145 400 SF <br />7220 ne <br /> Pho'~ e ~ c? <br />7 210 ~ ~= 8iy. <br /> art' <br /> ~°u ~° <br />7200 <br /> <br />7190 Edge o <br />Four States Aggregates, LLC 10 JAN 2001 <br />Application for Permit: Line Camp Pit M-2001-001 FSA-LCP-D2-001 <br />