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LAKEW OOD BRICK AN ~LE~. • • PAGE 2 <br />NOVEMBER 9, 1999 <br />made by Steve and the lengths came from an airphoto he has. We used average heights and <br />slope rates, but feel that if there are errors they are on the long side, so the calculated costs <br />are adequate to cover actual conditions. The volumes in this table have been adjusted using <br />a uniform 1.23 swell factor. <br />The areas listed as needing recoiling are areas where the clay has been piled or the <br />bottom of the clay seam exposed and no vegetation grows (yellow). The cross hatched area <br />(///) is where grading, shaping and revegetation will be necessary. We have found that areas <br />where the upper layer is stripped, like in Stage A, does not need recoiling. The native <br />material is uniform from surface to bedrock and our experience has shown that if the azea is <br />fertilized prior to seeding the grasses will grow without having any finer material. This can <br />be observed on site in the area between the eastern pit run gravel pile and clay stock pile in <br />Stage B. This area was partially stripped in 1997, pit run gravel was then replaced in the <br />area. No seeding was done, yet the area has nearly blended back with surrounding condi- <br />tions where no disturbance has taken place. <br />We use the equipment cost factors in you estimate for the dozer, revegetation <br />equipment and the revegetation costs. The mobilization cost numbers were use and expanded <br />to handle the other pieces of equipment we thought would be needed to complete reclama- <br />tion. The cost for backfilling, shaping and ripping were estimated from the Cat handbook <br />and contractor cost estimating data for this area. We are svessing that this plan is an interim <br />reclamation plan and does not change the final plan as approved. We have maintained the 2h <br />to ]v slopes because, the slopes are stable at this rate and are consistent with the approved <br />reclamation plan. <br />A check for the $150.00 Technical Revision fee is attached. Should this Technical <br />Revision and bond evaluation be acceptable we will provide a second bond for the increase <br />above the $40,000 we currently have, this will be consistent with Rule 4[4.1(4)] since there <br />are two types of operations at the site. If you have any questions on the bond calculations <br />please call Steve at (303) 423-7297. <br />Sincerely, <br />Lakew Brick <br />~'~'~'~ <br />homas nay <br />Vice President <br />enclosure <br />cc Environment, Inc, <br />Perry McKay <br />Charlie McKay <br />Albert Frei and Sons, Inc. <br />file <br />