REV94008 - Laserfiche WebLink

Home Browse Search

April 10, 2003 RN-04 Item 3. With regard to Paragraph 10, Affected area, page 3, of the Application, please revise the Application under the following guidance. Affected areas are defined as azeas undermined, areas within the zone of the angle of draw of potential subsidence, and areas disturbed by surface activities of the mining operation. a. Under Permitted, enter the sum of (1) the acreage of the areas permitted to be undermined in the 5-year mining plan, (2) the azea described at the surface by intersection of the angle of draw, and (3) the azea of surface permitted to be disturbed from surface activities outside the area of (l)and (2). The entered value of 1565 may be correct. The permitted area extent of parameters (1) and (2) may be determined off Drawing No. D-4-1 (dashed boundary line). To this would be the areas of additional permitted surface disturbance, once identified as 129 acres. The copy of Drawing D-4- 1 on file with the Division in the Permit Application Package (PAP) is dated 2/9/81. See Item 7 below. b. Under Actual, enter the sum of (1) the area (acres) actually undermined, (2) the acres of the area described at the surface by the intersection of the angle of draw from the actual area undermined and (3) the azea of surface disturbance from surface activities outside the area of (l)and (2) (avoid double counting as above for Permitted area). Although not so legended, the areas actually mined might be that shaded on Map D-30- 20 (11/99). In addition, mine inflow maps are on file at the Division. The version on file includes inflows of 6/84, and was received at the Division on January 9, 1986. The base of this map on file at the Colorado Geologic Survey, but not part of the PAP, is dated 12/4/82, but the advance of longwall mining is dated Februazy 18, 1983. The notice of temporary cessation at Mine No. 3 was provided by letter of December I5, 1982. This mine was to be idled on December 17, 1982. This letter stated 2.4 acres of affected surface azea at Mine No. 3. Notice of temporazy cessation for the Number 1 Mine was provided by a letter of July 31, 1984, which stated that all mining ceased as of July 24, 1984. No figure of affected area was provided. c. Leave "Proposed" blank. Item 4. With regard to Paragraph 11, Disturbed area, page 3 of the Application, please change 43.5 acres under Actual to read 65.2. Item 5. With regard to Pazagraph 13, on page 3 of the Application, under Actual, please change the 43.3 acre entry for A. 60 percent to read 65.2; change the 43.3 acre entry for B. 85 percent to read 65.2; and change the 0 acre entry for C. 100 percent to read 2. Item 6. With regard to Paragraph 17 of the Application, on page 4, please change Ol to read 0. Item 7. Please provide the exact number of surface acres affected in the permit area at the time of (permanent) cessation [Rule 4.30.1(2)(a)]. Such information might be appropriate to a