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<br />Letter: MLRD <br />Re: File No. M-77-210 <br />4/20/90 <br />Project No. 89002 <br /> <br />QUESTION NO. 7, SILT DEPTH MARKER. OWA <br />RESPONSE: The use of a single fluorescent orange marker on each riser <br />to mark the maximum sediment level will be utilized instead of incremental <br />depth marks on the risers. The single mark will be located on each riser <br />so that cleaning of the pond is required when the mark is no longer <br />visible due to sediment depth. <br />QUESTION NO. 8, REPORTING CLEAN-OUT VOLUMES. OWA/Heifner. <br />RESPONSE: The Operator will commit to record the approximate volume <br />of sediment removed from the pond during clean-out operations. This <br />information will be Included in the permit annual report. <br />Hopefully these responses adequately address the concerns of the Division. <br />We certainly appreciate your continued assistance with what has been an <br />extremely lengthy and sometimes difficult problem for all parties concerned. <br />It is the intent of the Operator to begin construction on the upper <br />Sediment Basin the week of April 30. Some of the alterations within the <br />quarry itself have already begun. We feel it is in everyone's best interest to <br />have both basins on line and operational as soon as possible given the Spring <br />rain season which we are already experiencing. <br />If there are any additional questions or if there is anything the Operator <br />or the Consultants can provide to obtain approval oP the design, please a~ntact <br />Mr. Morgan, Mr. Heifner or myself. <br />In behalf of the Operator we would once again like to thank yourself and <br />the rest of the staff for all oP their assistance with this problem. <br />Very truly yours, <br />OBE~RIQN~G, W~URTH 1~ ASSOCIATES <br />Roland G. Obering, PC/ <br />for and on behalf of <br />Castle Concrete Company <br />RGO/p <br />__...~.~ ... ..._, ...__,..__.~_~.u ~.,__._.~..,.~.--,.emu„_ <br />