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f. Map 12, Map 41 and Map 41A show the watershed boundaries for the South Area <br />and the South Taylor Area, respectively. As stated, there are several sections on <br />that these maps have in common. Please include a complete delineation of all <br />watershed boundaries on Maps 12, 41 and 41A for the boundaries that are <br />shown on both maps. <br />g. Map 41A shows the watershed boundaries for the South Taylor Pit area. The <br />section 21 and Section 28 watershed boundaries are delineated but not labeled. <br />Please label the Section 21 and Section 28 watershed boundaries on Map <br />41A. <br />h. Map 12 and Map 41 show the portion of the South Taylor Pit limit that crosses <br />over into Section 16. This disturbance limit is the currently approved limit. <br />Please change the South Taylor Pit disturbance limit that is currently shown <br />on Map 12 and Map 41 to reflect the changes proposed in Technical Revision <br />81. This limit includes the Section 16 Pit redisturbance for the temporary <br />overburden stockpile. <br />i. The Section 16 Pond Ditch is a major ditch in the sediment control plan. This <br />ditch collects runoff from the northeast portion of the South Taylor Pit, including <br />the X-Pod and Section 16 dump areas. Please include the Section 16 Pond <br />Ditch on Map 41A. <br />j. As discussed in several questions above, there will be major changes to, at a <br />minimum, the Taylor Tributary Ditch, the Section 16 Taylor Ditch (Version 2), <br />the East Taylor Ditch and the West Taylor Ditch. Based on these changes, <br />Colowyo will need to include new SEDCAD modeling for the East Taylor Pond. <br />Please include new SEDCAD modeling for the East Taylor Pond to <br />incorporate changes to the drainage areas and ditches in the watershed that <br />reports to the pond. <br />k. The post-mining topography shown on Map 41 is the currently approved post- <br />mining topography. Colowyo has not updated this map to reflect the changes <br />proposed with Technical Revision 81. Please update the post-mining <br />topography shown on Map 41 to reflect the post-mining topography <br />proposed with Technical Revision 81. <br />1. On Map 41 in the middle northern portion of Section 3 Colowyo shows a "Stoker <br />Ditch". This ditch is not shown on Map 33 or Map 33A and no designs are <br />contained in the permit for this ditch. This ditch appears to be a contour ditch that <br />will flow into the Streeter Gulch Ditch at approximately station 85+00. Please <br />provide the Division with an explanation of what this ditch is. If this ditch is <br />proposed as a permanent, post-mining channel, please proved design details, <br />including SEDCAD modeling, and include it on either Map 33 or Map 33A. <br />Please also include station tick marks for the ditch on Map 41. <br />38. Colowyo has proposed changes to the mining limits for the South Taylor Pit with <br />Technical Revision 81. The proposed limits have been changed on Map 23A -Mine <br />Plan-South Taylor Pit, Map 29A - Spoil Grading-South Taylor Area and Map 41A - <br />Watershed Boundaries for Hydrologic Modeling-South Taylor Area. Colowyo is <br />proposing to eliminate approximately 358 acres to the south and east of the South Taylor <br />Pit and approximately 92 acres to the west of the South Taylor Pit. Colowyo has also