2012-09-19_REPORT - C1981019 - Laserfiche WebLink

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South Taylor Fill Inspection Certification On September 13, 2012, I inspected the area in which the South Taylor Excess Spoil Fill is being constructed. This report covers activities associated with the East Taylor Fill and the West Taylor Fill identified on Map 23A of the approved permit. The purpose of this inspection was to observe status of the fill placement. This inspection is necessary to satisfy the requirements of CDRMS Rule 4.09.10 (la) and Rule 4.09.1 (1 b). Weather conditions were clear and all portions of the fill were visible. A -A' Area: The construction on the entire A -A' underdrain including fabric installation has been completed. The uppermost portion of the drain remains uncovered while the central portion has been covered with fill. The lowermost portion of the drain has been covered to within 100 feet of the inlet of the West Taylor pond. Fill placement continues. The toe is filled and sloped to the 7800 elevation and rip rap placement has begun on both the West Taylor West Trib and West Taylor East Trib channels. Dumping continues on the 7850 bench. Flows through the drain continue to contribute inflow to the West Taylor pond. During the quarter, the monitoring piezometer was drilled and completed at El ,344,205.55, N336,564.33, Elev. 7731.2. The first water level reading of 225.3 feet was obtained. B -B' Area: Underdrain construction is completed and all portions of the drain have been covered. Fill placement continues. Substantial quantities of fill have been placed over the drain. C -C' Area: Underdrain construction is completed and all portions of the drain have been covered. Fill placement continues. The 7800, 7850, 7900, and 7950 dump benches are completed. The 8000 bench and all higher benches were inactive during this quarter. In November, 2010, TR -88 was approved to extend the toe of the temporary fill. Further, in June, 2011, a permit change designated as TR -81 was approved to make these changes permanent with the modification of the postmining topography. Design requirements for the spoil pile are addressed in Volume 13, Exhibit 21, Item 1, Introductory Letter. Inspection requirements during construction are further detailed in Volume 12, Section 4.09. I am a Registered Professional Engineer in the State of Colorado and a representative of Environmental Solutions, Inc, P. O. Box 2996, Cheyenne, Wyoming. Being familiar with the Colowyo operation and the coal program permitting process in Colorado, the construction activities related to the East Taylor Fill are in conformance, to the best of my knowledge and experience, as specified in the Introductory pages and the associated report found in Volume 13, Exhibit 21, Item 1 and other applicable requirements of the approved permit documents, a portion of CDRMS Permit C -81 -019. osum#4 �.........� • O • ff 5 c. P • i '- 32257 C • o \ • e.. .. 4. 4 FS • •.....• \ • i ENV .� THOMAS C PETERS • xc: Mr. Kurtis Blunt, Colowyo Coal Co pa n y , 322 57 ON cf 17.15.1 cf 24.20 (South Taylor Fill) DATE 1