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7150 7100 7050 7000 w w w Z 0 r 6950 a W J W 6900 6850 0 50, 100, HORIZONTAL DISTANCE IN FEET Iu 1 a \ 1 � 1 / y ) l I n5 \ — s 23. 000 ) PLAN VIEW EXISTING TOPOGRAPHY- EXCESS SPOIL DISPOSAL SITE 40 7700 7650 7600 7550 7500 7450 7400 ~ 7350 w ` 7300 z 7250 z °- 7200 > 7150 w J w 7100 7050 7000 6950 6900 0 200' 400' HORIZONTAL DISTANCE IN FEET 150' 200 250' 300 350' 400• CROSS SECTION C - C EXCESS SPOIL DISPOSAL SITE SCALE: HORIZ. I "= 50' VERT. I"= 50' 450' 500' 7:50 7450 7100 7400 7050 7350 7000 7300 6950 7250 6900 7200 6650 7150 550' SPOIL ExC£55 `yOLF CREEK. _ 0 SCALEz I° =400" R PLAN VIEW POSTMINE TOPOGRAPHY- EXCESS SPOIL DISPOSAL SITE PROPOSED SPOIL SURFACE _r: r UNDERDRAIN 600' 800' 1000, X200' 1400• 1600 1800 2000 2200' 2400 2600' 2800' 3000 PROFILE A -A' - EXCESS SPOIL DISPOSAL_ SITE SCALE, HORIZ, 1" =200' VERT. I "= 200 CROSS SECTION D -D' EXCESS SPOIL DISPOSAL SITE 3200 SCALE: HORI Z.I"=50' VERT. I"=50' SPOIL FOUNDATION SURFACE 3400' 3600 7700 7650 7600 WQLF CREEK COAL SEAM 7550 7500 7450 7400 7350 7300 7250 72010 715(0 710(0 705,0 700)0 695;0 690)0 3800 4000' 4200` 4400' 7450 7400 7350 730U 7250 7200 7n5o °o 0 0 0 0 C) 0 0 0 SPRINGS AND SEEPS ABOVE b N W BOTTOM OR:OR.ANIAQE INC !IRANREfli8RE8L,LATERAL 1 a \ 1 � 1 / y ) l I n5 \ — s 23. 000 ) PLAN VIEW EXISTING TOPOGRAPHY- EXCESS SPOIL DISPOSAL SITE 40 7700 7650 7600 7550 7500 7450 7400 ~ 7350 w ` 7300 z 7250 z °- 7200 > 7150 w J w 7100 7050 7000 6950 6900 0 200' 400' HORIZONTAL DISTANCE IN FEET 150' 200 250' 300 350' 400• CROSS SECTION C - C EXCESS SPOIL DISPOSAL SITE SCALE: HORIZ. I "= 50' VERT. I"= 50' 450' 500' 7:50 7450 7100 7400 7050 7350 7000 7300 6950 7250 6900 7200 6650 7150 550' SPOIL ExC£55 `yOLF CREEK. _ 0 SCALEz I° =400" R PLAN VIEW POSTMINE TOPOGRAPHY- EXCESS SPOIL DISPOSAL SITE PROPOSED SPOIL SURFACE _r: r UNDERDRAIN 600' 800' 1000, X200' 1400• 1600 1800 2000 2200' 2400 2600' 2800' 3000 PROFILE A -A' - EXCESS SPOIL DISPOSAL_ SITE SCALE, HORIZ, 1" =200' VERT. I "= 200 CROSS SECTION D -D' EXCESS SPOIL DISPOSAL SITE 3200 SCALE: HORI Z.I"=50' VERT. I"=50' SPOIL FOUNDATION SURFACE 3400' 3600 7700 7650 7600 WQLF CREEK COAL SEAM 7550 7500 7450 7400 7350 7300 7250 72010 715(0 710(0 705,0 700)0 695;0 690)0 3800 4000' 4200` 4400' 7450 7400 7350 730U 7250 7200 7n5o k SPECIFICATIONS 1. Clearing: All vegetative and organic material shall be removed from the bottom of the drainage of the excess spoil disposal area and as much material as safely possible is to be removed from steep side slopes. 2. Scalping: All topsoil and loose subsoil shall be removed from the bottom of the drainage area and as much material as safely possible is to be removed from steep side slopes. Topsoil and subsoil is to be stored for future replacement. 3. Underdrain: A rock underdrain is to be installed having dimen- sions of 20 feet wide by 18 feet high. No more than 10% of the rock may be less than 12" in size and no single rock may be larger than 25% of the width of the drain. The underdrain will consist of natural sandstone rock and shall be free from coal, clay or shale. 4. Lateral: A lateral drain shall connect seeps above the drain - age cFannel to the main underdrain. The lateral drain will meet the requirements for the underdrain specified in #3 above. 5. Filter: The underdrain shall be covered by a filter blanket con- sisting of sand and gravel size overburden material. The filter shall be free from coal, clay or shale and have a thickness of 2 feet. 6. Construction: Fill is to be overburden spoil material (reasonably free of organic material) side cast by the dragline. 7. Bough Grading: Rough grading by dozers and other methods as re- quired shall be undertaken as soon as possible to minimize sur- face erosion, to convey surface water away from the fill, and to prevent the impounding and infiltration of surface water into the fill material. 8. Final Grading: Final grading by dozers is to be conducted to meet the requirements of the approved post mine contours and to prevent erosion and impounding of water. 9. Reclamation: Upon completion and acceptance of finish grading top- soil shall be replaced. Vegetation shall be established as soon as possible as per approved plan to minimize surface erosion. 10. Inspections: The fill will be inspected for stability by a registered engineer or other qualified professional specialist experienced in construction of earth and rockfill embankments at least quarterly throughout the construction and during the following critical con- struction periods: 1. Removal of all orgainic material and topsoil. 2. Placement of underdrainage system. 3. Installation of surface drainage systems. 4. Placement of fill material. Permit Number #: C- 1980 -005 5. Revegetation Class: Permit Section /Exhibit: s' j.`Pirj tIF�Qas �. M EXf*8lT 12 - E S 3 VQ CESS SPOIL DISPOSAL SITE :CONSTRUCTION PLAN SENECA II MINE O7 PEABODY COAL CO,10375E. HARVARD AVE., OE N V EA, CO LORA DO 80231 DESIGNED BY: R.A.I. SCALE: AS SHOWN f DRAWN BY: J.M.G. DRAWING DATE 3-14 -84 CHECKED BY: R.A.I. PHOTO DATE REVISIONS B-9 -84 D.E.F. 9- 12 -85D. E. F, 8 -14 -85 J.M.G. f k SPECIFICATIONS 1. Clearing: All vegetative and organic material shall be removed from the bottom of the drainage of the excess spoil disposal area and as much material as safely possible is to be removed from steep side slopes. 2. Scalping: All topsoil and loose subsoil shall be removed from the bottom of the drainage area and as much material as safely possible is to be removed from steep side slopes. Topsoil and subsoil is to be stored for future replacement. 3. Underdrain: A rock underdrain is to be installed having dimen- sions of 20 feet wide by 18 feet high. No more than 10% of the rock may be less than 12" in size and no single rock may be larger than 25% of the width of the drain. The underdrain will consist of natural sandstone rock and shall be free from coal, clay or shale. 4. Lateral: A lateral drain shall connect seeps above the drain - age cFannel to the main underdrain. The lateral drain will meet the requirements for the underdrain specified in #3 above. 5. Filter: The underdrain shall be covered by a filter blanket con- sisting of sand and gravel size overburden material. The filter shall be free from coal, clay or shale and have a thickness of 2 feet. 6. Construction: Fill is to be overburden spoil material (reasonably free of organic material) side cast by the dragline. 7. Bough Grading: Rough grading by dozers and other methods as re- quired shall be undertaken as soon as possible to minimize sur- face erosion, to convey surface water away from the fill, and to prevent the impounding and infiltration of surface water into the fill material. 8. Final Grading: Final grading by dozers is to be conducted to meet the requirements of the approved post mine contours and to prevent erosion and impounding of water. 9. Reclamation: Upon completion and acceptance of finish grading top- soil shall be replaced. Vegetation shall be established as soon as possible as per approved plan to minimize surface erosion. 10. Inspections: The fill will be inspected for stability by a registered engineer or other qualified professional specialist experienced in construction of earth and rockfill embankments at least quarterly throughout the construction and during the following critical con- struction periods: 1. Removal of all orgainic material and topsoil. 2. Placement of underdrainage system. 3. Installation of surface drainage systems. 4. Placement of fill material. Permit Number #: C- 1980 -005 5. Revegetation Class: Permit Section /Exhibit: s' j.`Pirj tIF�Qas �. M EXf*8lT 12 - E S 3 VQ CESS SPOIL DISPOSAL SITE :CONSTRUCTION PLAN SENECA II MINE O7 PEABODY COAL CO,10375E. HARVARD AVE., OE N V EA, CO LORA DO 80231 DESIGNED BY: R.A.I. SCALE: AS SHOWN f DRAWN BY: J.M.G. DRAWING DATE 3-14 -84 CHECKED BY: R.A.I. PHOTO DATE REVISIONS B-9 -84 D.E.F. 9- 12 -85D. E. F, 8 -14 -85 J.M.G.