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continue to be monitored and the postmining topography adjusted, if necessary. Any <br />`- adjustments will be minor, will be done gradually and will not affect the reclamation plan or <br />postmining land use. Particularly, drainage channel gradients will no[ be changed; an entire <br />drainage channel elevation could possibly be revised, but the gradient would remain as <br />designed. [f a change would be necessary, the dump plan elevations would be revised as <br />appropriate. <br />In order to verify accuracy of the overburden swell factor predictions and postmining <br />topography projections in the initial permit term, Colowyo has committed to the following <br />requirements: - <br />"The applicant has committed, within the application to monitor the topographic <br />configuration of the pit and the postmining reclaimed surface of the mined area, in <br />order to verify the accuracy of the overburden swell factor and postmining <br />topography projections. As specifie4d in the application, monitoring for these <br />purposes shall consist of annual survey, utilizing field survey or aerophotogrammetric <br />methods approved by the Division. Using maps depicting the annual surveyed <br />configuration of the pit and reclaimed areas, the permittee will determine the overall <br />overburden swell and the resultant variation between premining and post-mining <br />topographic elevation for the mined areas. Further, the permittee will ascertain, <br />record and report to the Division the proportions of overburden excavated using <br />truck shovel and dragline methods. The maps and a report presenting the <br />methodology and results of the required determinations will be submitted to the <br />• Division for review and approval on an annual basis. The permittee will continue <br />these monitoring procedures on an annual basis until the Division determines the <br />results sufficient to adequately verify overburden swell factor projections and <br />approves, in writing, cessation of monitoring. The maps will include a comparison of <br />proposed and actual reclaimed contours and will be submitted annually throughout <br />the permit term." Excemted from Colow~ Findings and Proposed Decision to <br />Approve Permit. Fiie No. C-019-81, September 28, 1982. <br />The results of the monitoring can be found in the 1983 - 1982 Annual Reports. <br />[n the 1986 Annual Report, Colotvyo requested a reduction in the overburden swell factor <br />monitoring from an annual frequency to once every two and on-half years, and in a letter <br />dated May 12, 1987 the MLRD stated that they were prepared to approve the reduction, <br />which was made affective upon permit renewal. <br />In the 1992 Annual Reclamation Report, Colowyo requested that the swell factor monitoring <br />and analysis requirement be terminated. On August 11, 1993, Colowyo submitted a request <br />for a minor revision to C-81-019 to facilitate the termination of this monitoring. <br />The mining plan, as described in Section 2.05.3, is a soundly designed and engineered open <br />pit mining plan, which maximizes coal conservation and recovery while minimizing adverse <br />environmental <br /> <br />4.14-2 Revision Date: 8/11/93 <br />Revision No.: MR-25 <br />