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<br />-6- <br />b. A low spot is shown on the east pond embankment as built drawings. Is this <br />accurate? If so, the emergency spillway configuration needs to be lowered to <br />maintain the required 1 foot freeboard. If the low spot has been filed in, <br />please correct the drawing. <br />c. Hydraulics for the perforated trash rack need to be submitted to use in <br />conjunction with the discharge-head relationship of the 2.5" orifice. <br />d. The schematic of the to-level outlet of the east pond does not represent a 1./5" <br />orifice. What is represented and what is proposed? <br />e. Dimensions and notch angles of the emergency spillways do not agree with the <br />text. Correct configurations are required. <br />f. 12 inch barrel diameters are indicated on the schematic for the low-level <br />orifices. Other sources indicate an 9 inch pipe. Also no length was supplied. <br />Given 2:1 and 3:1 slopes, a crest length of 8 feet, and a height of 8', this pipe <br />should be upwards of 50' in length. Please provide accurate diameters and <br />lengths for all spillway barrels. <br />4. The Division does not approve the wrapping of perforated pipe with a screen or cloth. <br />This practice has proven not to perform well under field conditions and requires <br />constant maintenance. <br />Rule 2.05.4 <br />1. Delete the last sentence of paragraph 1, page 1, "the remainder..." This sentence <br />binds you to having Burnett doing the work. <br />2. The text needs to incorporate the statement "that upon conclusion of mining, the well <br />(or wells) will be transferred to the landowners." <br />3. Page 2 Sealing of Mine Openings and Drill Holes. All vent holes require sealing and <br />well and costs for this should be included in the bond estimate. <br />4. Page 3 paragraph 6, please delete the statement "topsoil will be spread evenly to <br />required depth, as determined by the test area. and the area planted..." as the test plot <br />area was not constructed and planted as designed. <br />5. As noted earlier, the topsoil borrow area will need to be reclaimed as part of the <br />disturbance area. Therefore, an estimate of the acreage of the area that will be <br />disturbed by removal of topsoil is required and all associated reclamation costs need <br />to be incorporated into the bond estimate. <br />