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Ms. Christine Johnston <br />Mountain Coal Company <br />Page 22 <br />April 14, 1997 <br />83. Please provide the Division with a map showing precisely where disturbed land will occur <br />within 100 feet of Sylvester Gulch. The Division may request additional information to <br />substantiate a vaziance finding regarding stream buffer zones. <br />84. The Division has no further concerns. MCC does not believe that it would be appropriate <br />to add pond SG-l to the surface water monitoring program list in Table 5 since the <br />sedimentation pond water monitoring is listed in the NPDES permit in Exhibit 7. <br />85. Revised Maps 53B and 54B were provided with the March 7, 1997 submittal. the <br />Division has no further concerns. <br />Additional Adequacy Questions -Ponds, impoundments, and diversions (Rule 2.05.3(4)) <br />86. On the drainage basin routing diagram, found on Map 1 E of the March 7, 1997 submittal, <br />please change all culverts that are designated as CLSY to CSLY, for the sake of <br />uniformity. <br />87. On the drainage basin routing diagram, found on Map 1 E of the March 7, 1997 submittal, <br />please switch the ditch designations DCW-6A and DCW-6B. <br />88. On the drainage basin routing diagram, found on Map I E of the March 7, 1997 submittal, <br />please switch the sub-basin designations 46A1 and 46A2, if you agree. <br />89. On the drainage basin routing diagram, found on Map 1 E of the March 7, 1997 submittal, <br />please show that sub-basin designation 40A drains above junction no. J4, not below J4, <br />if you agree. <br />90. On the drainage basin routing diagram, found on Map 1 E of the March 7, 1997 submittal, <br />please show that sub-basin designation 37A drains below culvert CSG-l, not above CSG- <br />1, if appropriate. <br />91. Map 53B shows a topsoil pile #6 neaz landing #2. According to Drawing E611305A, that <br />pile is topsoil pile #4. Please reconcile this difference. <br />92. Page 3 of Exhibit 69 states that the buried culvert, CCW-1B, is 48 inches in diameter. <br />However, the Sedcad run and the culvert data chart on Map 54B show that culvert CCW- <br />1 8 is to be 54 inches in diameter. Please reconcile this difference. <br />93. The Sedcad designs submitted on March 7, 1997, for ditches DSLY-1, DSLY-2a and <br />DSLY-2b, state, in the subtitle, that the designs are for the 100 year storm flow. Please <br />change the subtitle to 10 yeaz storm flow. <br />