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.. ; ,, <br />2. In Exhibit 4e-7,(proposed AVF environmental monitoring plan) TCC will <br />establish alluvial wells to monitor the Fish Creek AVF upstream and <br />downstream of the subsided area. The permit text commits to installing <br />the first two of these wells one year prior to longwall mining in panel 13 <br />Right. Please include in the permit text an approximate date of <br />installation of these first two wells given the projected rate of mining <br />advance. <br />3. In Exhibit 4e-7, please modify the permit text under the subheadings <br />Alluvium and Surface Water to monitor the proposed wells quarterly for <br />water levels and fie/d parameters. <br />4. In addition, in Exhibit 4e-7, what is the anticipated period for gauging the <br />surface water stations in section 17, T5N, R86W? The Division suggests <br />gauging of the site twice in the first year folowing installation and once <br />each year following spring runoff at this new site. Please include this <br />commitment in the permit text. <br />5. No monitoring commitment was provided in the permit text for the alluvial <br />well to be established in section 11, T5N, R86W. Please include a <br />monitoring frequency for this well in the permit text. <br />6. How will subsidence affect the downstream well for the mining in panel <br />13 Right? This well will ultimately become the upstream alluvial <br />monitoring well for future miningto the north. What changes regarding <br />water level can be expected at this location following subsidence? This <br />site will require surveying of the top of casing following subsidence. <br />Please add this commitment to the permit text. <br />7. Water quality data was included in Table 9R for spring 58608-1. Where <br />is this spring located? It does not appear on Figure 5K. Please add this <br />spring to Figure 5K. <br />Comment to Janet: TCC is proposing to submit environmental monitoring for <br />Fish Creek in the Annual Hydrology Report. I am not sure this is the best way to <br />submit this information but I will leave that possible issue to you. <br />This concludes my review. If you have questions, please let me know. <br />CC: Dan Hernandez <br />• Page 2 <br />