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r <br />,• <br />Permit Ilo. C-83-059 <br />April 4, 1988 <br />Page 2 <br />5. Please submit three (3) copies of Map 12. It was not present in <br />any of our copies of your permit application. <br />6. The reclamation bond was re-calculated using a new system which was <br />developed by Division staff in 1986. This system uses operating <br />cost data for earthmoving equipment derived from the Cost Peference <br />Guide. This results in less-conservative but more realistic cost <br />estimates. Due to the reduction in conservatism, we found it <br />necessary to increase the level of detail in our estimates, as you <br />will see. Attached are my calculations for your review and <br />comment. I made several assumptions concerning sizes of structures <br />and amounts of material. If my assumptions are incorrect or if you <br />have better information available, please let me know, <br />There are several items for which I could not complete my <br />calculations. These items are listed below. I will adjust my <br />calculations when I receive your response. It appears, however, <br />that your current bond is well within range of the attached <br />calculations. <br />a. What is the volume of concrete to be removed helow the <br />control tower and at the fines reclaim system retaining wall <br />(length, width and depth)? <br />b. What is the volume of metal and concrete to be removed <br />associated with the walkway and staircase? <br />c. What is the volume of the control tower? <br />d. What are the sizes of the primary and secondary substations? <br />e. How much does the car puller weigh? <br />f. Please submit cost estimates for installation of the straw <br />bales during interim sediment control and contour furrows. <br />If you have any questions, please feel free to call, <br />Sincerely, <br />.~ <br />Susan J. Mo <br />Reclamation Specialist <br />SJM/rj a <br />Enclosure(s) <br />6506E <br />