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iu iiiiiiiiuiiiiii <br />999 <br />Richartl D. Lamm <br />Governor <br />DEPARTMENT OF NATURAL RESOURCES <br />Devitl H. Getche4 Executive Director <br />MINED LAND RECLAMATION DIVISION <br />DAVID C. SNELTON, DlroMOr <br />DATE: Apr11 9, 1984 <br />~~, <br />T0: Mike Savage ` <br />FROM: Jim Pendleton \""~ <br />RE: Meeker Are Ines ackf1111ng and Grading Plan for the Northern No. 1 <br />Nine <br />Pursuant to your request, I have reviewed the backf111ing and grading plan <br />proposed by Northern Coal Company for Implementation 1n the portal and surface <br />facility area of their Northern No. 1 Nine. <br />The proposed edit sealing plan does conform with NSHA regulations, and will be <br />acceptable. The final regraded slopes are relatively steep in some areas, <br />approaching 2:1 (horizontal to vertical) grades. However, with appropriate <br />control and supervision it should be possible to achieve a stable reclaimed <br />configuration. <br />I recommend that we require the operator to submit a certified report, <br />prepared by the registered engineer supervising earth work at the site. That <br />report should Include documentation of edit sealing and backfilled material <br />compaction testing. further, we should require the operator to submit a final <br />reclaimed slope map, prepared by a registered land surveyor, certifying that <br />the approved post-mining approximate original contour has been achieved. <br />The proposed post-mining ditch "improvement" should not endanger the reclaimed <br />area, since it occupies a position astride the opposite valley slope. <br />However, because of the similar steepness of that slope, care must be taken to <br />seal the ditch with clay or other appropriate fine material. <br />Finally, we should require the operator to monitor the stability of the <br />reclaimed portal bench area. The operator should prepare and submit a <br />survey-type monitoring program. This program should continue for an <br />appropriate multi-year period, following final reclamation of the site. Ne <br />should retain appropriate surety to insure the monitoring program's completion. <br />/ep <br />cc: Brian Munson <br />Doc. No. 0629 <br />423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203 Tel. (30~) 866-3567 <br />