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~~OUNTAIN COAL ~ ~`° COMPANY~.~t:. A Subsidiary of Arch Wes[em Resources, IZC West Elk Mine P O Box 591 5174 Highway 133 Somerset, CO 81434 (970)929-SOTS Fax (970) 929-5595 MCC Response: MCC has provided a discussion regarding the proposed monitoring. New Comment: Changes in the PAP text state in several places that Mountain Coal Company will begin monitoring certain streams a yeaz before mining is planned in that area. Please emphasize in the text that baseline-monitoring data for these streams that were collected in the past, and MCC suspended monitoring until a yeaz before mining started. This will make it clear within the text that baseline data exist for the principle streams in the SOD area. Furthermore, the Division suggests that MCC consider resuming monitoring these sites or at least to committing to a date within the permit application. MCC Response: MCC described the monitoring plan on page 2.04-80 and Table 9 pages 2.04-82 through 85. ~~ 39. Response accepted. ~g 40. Response accepted. 5 ~ 41. That information appeazs in Exhibit 32B. Response accepted. ' ~ X42. Original Comment: On page 2.04-88 the discussion relating to drainage basins indicates that basins #33 and 34 lie outside the zone of influence of planned SOD mining. That does not ft with what is shown on the map In Figure 1, exhibit SSA. Please check and revise or explain as necessary. (That may also apply to basin #4.) MCC Response: Additional information was added to clarify the drainage basins. New Comment: Table 1 of Exhibit SSA still shows the proposed panel E9 directly beneath basins 33 and 34. Please review and resolve. MCC Response: Exhibit SSA was intended to show potential impacts to stream channels due to mine- induced subsidence. Table 1 of Exhibit SSA has been updated to reflect that the evaluation was performed on stream channels within the basins shown on Figure 1. Although the Division was correct to point out that some portions of Basins 4, 33, and 34 lie overtop of the mining layout, none of the stream channels will be affected by mining. To be certain of this, all three-stream channels were modeled to verify that they would not be impacted by subsidence. A footnote was added to Tab[e 1 to reflect that the channels ojBasin Nos. 4 and 34 are outside ajthe influence of mining even though portions of the drainage basins overlie mine workings. ~j~43. Response accepted. ;I/ 44. Response accepted. /~ 45. Baseline data was discussed in the text. Response accepted. • J~46. Original Comment: The section refers to the approved adjudication plan in section 2.05.6(3)(b) but that section does not appear in the Table of Contents. Please confirm and add to the TOC. MCC Response: MCC has previously included the adjudicated augmentation plan in the PAP at Exhibit 52.