2015-08-14_REVISION - C1982056 - Laserfiche WebLink

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acres. It is unclear why there is a discrepancy in how many acres TC requested to increase their permit area by and how many acres the Division ended up approving. Given this, I compared the permit boundaries depicted on Map 23 approved with TR82 and the map that was previously approved prior to TR82 which appears to have been revised with TR78. It appears the permit boundary was modified in two areas based on these maps. One area is located in the NE '' of Section 34 of TSN, R87W. The second parcel is located in the NE % of Section 13 of TSN, R87W. A map depicting these two areas is enclosed to assist with this review. Does the 22,607 acre total permit area projected with PRI 0 include these parcels? Response: The PR14-10 submittal did not include Map 23 (relevant map showing the Wolf Creek mining area was labeled Map 23 in the original submittal, but was corrected to Map WC23, since Map 23 shows the entire Twentymile mining area). The most recent update to Map 23 was for TR13-83 (map revision date identified as 01/24/14). This map includes the two permit boundary modifications noted in the comment above. The Permit Area was noted in TR13-83 (both pages 2.01-4 and 2.05-3) as 21,447 acres. With the addition of the 160 acres for PR14-10 in Sections 12 and 13 (TSN, R86W), the total Permit Area acreage should be 22,607 acres. 14b) Page 2.05-181.10 appears to be missing several paragraphs under the Railroad section that began on page 2.05-181.9. Please submit revised pages to include the information that has been deleted. Revised page 2.05-181.10 has been updated; the second paragraph under the Fish Creek section indicates the extent of flooding is presented in Exhibit 25Yfor the WMD. The exhibit cited should be Exhibit 25Z. Please revise this page to cite the correct Exhibit. Response: The referenced page has been corrected, and copies of the corrected page accompany these responses for replacement in the PAP. 16a) TC submitted revised pages 2.05-181.13, 181.15 and 181.16. The last paragraph continues from page 181.13 to 181.15. It appears page 181.14 was skipped in the pagination. Please re paginate these three pages to 2.05-181.13, 181.14 and 181.15. Response: The noted error in page numbering has been corrected, and copies of the corrected pages accompany these responses for replacement in the PAP. 25b) Rule 2.05.6(6) (c) (ii) requires that the application shall include an appropriate map, prepared according to the standards of section 2. 10, showing the location of monuments to be installed and structures to be monitored within the permit and adjacent area. Revised pages 2.05-191.8 and 191.9 indicate that TC will monitor monuments along RCR33 and the Railroad. The Division could not locate a map in the permit that depicts the monuments/subsidence reference points used to monitor subsidence related impacts to these structures. Please submit a map that complies with the cited rule. The revised map shows the subsidence monitoring area but does not show the location of the monuments to be installed. Please revise this map to indicate where monuments will be installed. Please keep the subsidence monitoring area polygon on the map. Response: For both RCR33 and the railroad spur, monitoring points will be established at 100 -foot intervals within the monitoring zones shown on Map WC 23. For the County Road, monitoring points will be steel nails driven into the shoulder on one side of the road. For the railroad spur, monitoring points will be marked with paint on the outside of the rail. For the potentially affected powerline, each pole -set will be visually monitored (TC does not have survey information for the third -party owned powerline). Monitoring points will be established and monitored only within the active mining area and only during the period of active undermining. Notes have been added to the legend for Map WC23 to delineate the monitoring interval. Identification of the monitoring zones along with this supplemental information should be adequate to meet the requirements of Rule 2.05.6(6)(c)(ii), particularly given the scale of the Map (1" = 600') and the amount of information presented on the Map.