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Jeny M Nettleton <br />Twentymile Coal Company <br />Page 2 <br />November 27, 2006 <br />Rule 2.05.6(6)(c)(i)(B) Monuments shall be situated to appropriately monitor ground <br />surface movement, vertical and horizontal, within the area proposed to be undermined, <br />including an area to accommodate the predicted angle-of--draw. <br />The monuments aze so situated. Base line and subsequent surveys of the monuments aze <br />to record X, Y and Z coordinates of each leg of each tower structure (PAP pages 2.05- <br />191.6 and 2.05-191.7). <br />Rule 2.05.6(6)(c)(i)(C) The orientation, location and elevation of each structure within <br />the permit and adjacent area shall be monitored. <br />Item 3. Please add the location of each monument to Map 23B with reference to it on <br />page 2.05-191.6 of the PAP, and the location of each monument on the Subsidence <br />Map of the report. <br />Item 4. Please report the monitoring measurements made in the information <br />requested under Rule 2.05.6(6)(c)(i)(E) below. <br />Rule 2.05.6(6)(c)(i)(D) Monitoring of established monuments and structures shall be <br />performed at least quarterly, commencing one month prior to the initiation of mining <br />beneath any established monument or structure. <br />The timing for monitoring is described in the PAP on pages 2.05-191.6 and 2.05-191.7. <br />Item 5. Please report the monitoring measurement made in the information <br />requested under Rule 2.05.6(6)(c)(i)(E) below <br />Rule 2.05.6(6)(c)(i)(E) Results of the monitoring program shall be submitted to the <br />Division at least semi-annually. <br />The subsidence report is to be to be submitted 60 days after the end of a period (PAP, <br />page 2.05-186). The format of the report is at Exhibit 34 of the PAP. <br />Item 6. Please supplement the report with the subsidence information alluding to the <br />power lines. <br />I have established a tracking date of December 22, 2006, for receipt of the supplemental <br />information. Please contact me if you have any questions. <br />Yours truly, <br />~~±~- A. G/~. <br />B~oS Ci. Walker <br />Environmental Protection Specialist <br />files: C-1982-056, reports <br />C:\bgw\My DocumentslFoidel Creek\Subsidence reports\2006 1st half review <br />letter.doc <br />