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J <br />within 2 working days and complete a survey of the twelve survey monuments <br />and report the results to the Division within one month. <br />4) Colowyo will complete an annual inspection of the Streeter Fill during the <br />second calendar quarter by a registered engineer. This inspection will <br />include specific examination of items 1 and 2 above and include a <br />discussion of the facial conditions of the fill in order to determine <br />whether the development of perched water tables within the fill is <br />effecting its surficial slope stability. <br />5) The monitoring reports and certified inspection reports will be available <br />during inspections by the Division but will only be submitted to the <br />Division in the Annual Reclamation Reports. <br />On 9/9/97 monitoring of the 6900 well indicated that the steel casing had failed <br />at the 114.3' level allowing water from a pre-existing perched water zone to <br />enter the well at that level. Subsequent monitoring for the next year indicated <br />that the inflow was variable but never completely subsiding. As such, the W6900N <br />well could no longer be relied upon to monitor for development of a perched water <br />zone in the base of the fill. In September, 1998 Colowyo proposed Minor Revision <br />MR-48 to install a new monitoring well on the 6700 bench of the Streeter fill. <br />. The W6700 well would serve as the new piezometer well for monitoring purposes <br />(see item #2 in the preceding section). The installation of the well was <br />completed on October 13, 1998 and the as built information submitted through the <br />MR-49 process. Refer to Drawing 30A - Revised Streeter Fill As-Built for a <br />location of the Streeter fill wells. Information obtained from the two 6900 wells <br />(drilled in the early eighties) could be of some interest in the future so the <br />two wells will remain in place for possible future monitoring. No formal <br />monitoring program is proposed at this time for the two 6900 wells. <br />WEST PIT AND SECTION 16 PIT EXCESS SPOIL FILLS <br />To develop the west pit and Section 16 pit, it will be necessary to construct two <br />excess spoil fills from material in the initial cuts. For further details <br />regarding these fills, refer to Exhibit 19 - Geotechnical Investigations, West <br />Pit Fill and Section 16 Fill. <br />The volumetric balance indicating excess spoil will be generated and disposal of <br />excess spoil will be required is found in Section 2.05.3. <br />• 4.09-2 <br />Revision SubmiGed ( Z- _ y ' S~ <br />Revribn No. m R - y 9 <br />