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;~ ~ <br />ALBERT FRET & SONS <br />~~C/.E'//~'!/ // <br />/~~~~ <br />P.O. BOX 700 <br />HENDERSON,CO 80640 <br />(303) 289-1837 <br />(303)289-2865 FAX <br />Y'~~4.a~~ V ICA..I <br />~UL 1 G 2007 <br />July 13, 2007 <br />Mr. Thomas Schreiner <br />Division of Reclamation, Mining & Safety <br />Minerals - North <br />1313 Sherman St. Room 215 <br />Denver, CO 80203 <br />Dear Mr. Schreiner; <br />RE: Albert Frei and Sona, Inc. <br />Walstrum Quarry <br />M.L.R.B. Permit # M-1983-033 <br />Division of Reclamation, <br />Mining and Safety <br />This Technical Revision is to address the corrective actions <br />noted in your June 15, 2007 inspection report. Shortly after your <br />inspections Albert Frei and Sons, Inc. completed the cleanup and bank <br />stabilization as we discussed at the inspection. while it has been <br />rather dry over the past month we felt it was prudent to get the work <br />done before any problems occurred. The following text outlines what <br />was done and the cost for completing the tasks. The attached photo <br />page shows the two areas of concern and how they look now that they <br />have been corrected. <br />The ramp area was graded and shaped and approximately 35 tone of <br />4 inch plus material was used to face the ramp to stabilize it and <br />prevent erosion. The material was spread on the ramp 12 inches deep <br />from the top of the slope down to the Ordinary High Water (OHw) line. <br />This avoids placing fill into the river without having the proper 404 <br />permit. Large rocks were then place at the top of the ramp to re- <br />strict vehicle access. The western aide where the ramp meets the <br />revegetated berm will be seed this fall. On the east aide the rock <br />was blended with the slope where stabilization rock was spread in <br />previous years. <br />In the area where the gully erosion was developing, we graded the <br />eroded channel, placed an isolation ditch along the top of the elope <br />to direct the water to the stormwater pond on the east aide of Stage <br />Y. The area was then stabilized with 15 tone of the 4 inch plus <br />material as was done on the ramp area. Again only the area above the <br />OHW was done to avoid permitting issues. <br />