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U.S. DEPT. OF THE INTERIOR <br />OFFICE OF SURFACE MINING <br />Mine Site Evaluation <br />Permittee/ Permit 32 056 Field Visit 5/22/20(4 State Program <br />Person C - - <br />TWENTYMILE COAL Number Date <br />Continuation Page <br />28. Performance Standard Categories <br />Codes:I-Compliance, 2- Noncompliance, 3 =Not Planned, 4=Not Started, 5= Noncompliance Identified Elsewhere, 6= Previously Cited, 7= Permit Defect <br />A. Administrative <br />D. Backfilling & Grading <br />H. Subsidence Control Plan <br />1. Mining within Valid Permit <br />I- <br />Exposed Openings <br />I. Roads <br />2. Mining within Bonded Area <br />2, <br />Contemporaneous Reclamation <br />1. Road Construction <br />3. Terms & Conditions of Permit <br />3. <br />Approximate Original Contour <br />2. Certification <br />4. Liability Insurance <br />4. <br />Highwall Elimination <br />3. Drainage <br />5. Ownership and Control <br />5, <br />Steep Slopes (includes downslope) <br />4, 1 Surfacing and Maintenance <br />6. Temporary Cessation <br />6. <br />Handling of Acid and Toxic Materials <br />5. Reclamation <br />7, AML Rec. Fees - Non - Respondent <br />7. 5 <br />Stabilization (rills and gullies) <br />J. Signs & Markers <br />8. AML Rec. Fees - Failure to Pay <br />E. Excess Spoil Disposal <br />1. 5 Signs <br />B. Hydrologic Balance <br />1. <br />Placement <br />2. 5 Markers <br />I. Drainage Control <br />2. <br />Drainage Control <br />2. Inspections & Certifications <br />p <br />3. <br />Surface Stabilization <br />K. Distance Prohibitions <br />3. 5 Siltation Structures <br />4. <br />Inspections & Certifications <br />L. Revegetation <br />4. Discharge Structures <br />5. Diversions <br />F. Coal Mine Waste <br />1. Vegetative Cover <br />g <br />6. Effluent Limits <br />(Refuse Piles <br />/Impoundments) <br />2. Timing <br />7. Ground Water Monitoring <br />I . 1 <br />Drainage <br />e Control <br />M. Postmining Land Use <br />8, Surface Water Monitoring <br />2. 1 <br />Surface Stabilization <br />9. Drainage - Acid -Toxic Materials <br />3. 1 <br />Placement <br />N. Other <br />10. Impoundments <br />4. <br />Inspections & Certifications <br />General <br />1 1. Stream Buffer Zones <br />5. 1 <br />Impounding Structures <br />Performance <br />Category <br />C. Topsoil & Subsoil <br />G. Use of Explosives <br />1. Removal <br />I. <br />Blaster Certification <br />2. Substitute Materials <br />2. <br />Distance Prohibitions <br />3. 1 Storage and Protection <br />3. <br />Blast Survey /Schedule <br />4. 1 Redistribution <br />4. <br />Warnings & Records <br />5. <br />Control of Adverse Effects <br />Performance Standard Categories <br />E. Excess Spoil Disposal <br />316/817.71 -74) <br />30 CFR Counterparts <br />I. Placement. <br />-- 7I(e) <br />A. Administrath-e ................................................ ............................... <br />2. Drainage Control <br />1M <br />1. Valid PenT t <br />773.11 <br />3. Surface Stabilization. <br />71(g) <br />2. Mining aithin Bonded Area <br />773.11 <br />4. Inspections & Certifications <br />71(h) <br />3. Terrns &Conditions of Permit <br />77317 <br />F. Coal dine Waste (Refuse FievIngpoundmena) - 316/317.31 -84) <br />4. Liability Insurance <br />800.60 <br />1. Drainage Control <br />.83(a) <br />5. Oanership and Control <br />778.13 <br />2, Surface Stabilization--- --- <br />-- -------S3(b) <br />6. Temponrycessation 842.11(e) &816'817.131 <br />'. <br />3. Placement <br />83(c) <br />AA4L Rec. Fees -- Non - Responder <br />_87015(b) <br />4. Inspections and Certifications <br />33(d) <br />S. ANN Rec. Fees -- Failure to Pay <br />8'0.15(2) <br />5. Impounding Structures <br />- 34 <br />B. Hydrologic Balance <br />(816/817.41 -57) <br />G. Use of Explosives <br />3161817.61 -63) <br />1. Drainage Control <br />- - - -- 45 <br />1. Blaster Cenification <br />61(c) <br />2. Inspections& Certifications <br />- 49(ax10) <br />2. Distance Prohibitions <br />1(d) <br />3. Siltation Structures <br />46 <br />3. Blast Survev Schedule <br />62-64 <br />4. Discharge Structures <br />4. Waatings & Records - <br />66 & 68 <br />5. Divil <br />4i <br />5. Control of Adverse Effects <br />67 <br />6. Effluent Lsrtits <br />-. Ground WaterMonitaristg <br />41 <br />41(c) <br />H. Subsidence Control Plan <br />(317.121 -122) <br />8. Surface Water Monitoring <br />41(e) <br />L Roads <br />1. Road Construction <br />(8161317.150 -151) <br />9. Drainage -- Acid - Toxic Materials <br />41(f) <br />150(c) <br />10. Impoundments <br />19 <br />2. Certification -- - <br />-- 151(x) <br />11. Stream Buffer Zones <br />57 <br />3. Drainage <br />150(b }151(4) <br />C. Topsoil & Subsoil <br />(816/817.22) <br />4. Surfacing and Maintenance <br />150(e)-151(d) <br />1. Removal <br />22(a) <br />5, Reclammtion <br />150(f) <br />2. Substitute Materials. <br />22(c) <br />J. Signs At Markers <br />316/317.11) <br />3. Storage and Protection <br />4. <br />22(c) <br />1. Signs <br />I I (a),(b), &(c) <br />Redistribution <br />22(d) <br />2. Marken <br />II(a),(b),(d),(e),&(f) <br />p.Backfilling & Grading ---- ---- -- <br />-- 816/817.95 -107) <br />K Distance Prohibitions <br />(761.11) <br />1. Exposed Openings 16817.13,14,15, <br />&823.11 &21 <br />L. Ret-egetation <br />(316/317.111 -116) <br />2. Contertrianleous Reclamation <br />100 <br />1. Vegetative Cover <br />111 & 116 <br />3. Approximate Original Contour <br />4. <br />102(axl) <br />2. Tinting <br />113 <br />tghnnll Elimination <br />102(ax2) <br />'NI. Postining Land Use <br />(816/317.133) <br />5. Steep Slope; Cmcludesdoanslope) <br />107 <br />6. Handling of Acid & Toxic Materials <br />102(c) <br />Stabilization (rills and gullies) <br />SIRb) <br />OSM Action Off -Site Imoacta <br />1) Deferred to State Action 8) ID -CO Issued (Imminent Danger to Public) For each type of impel end resource affected, enter Page 2 of 2 <br />2) TON Issued 7) Previously cited by RA, abatement pending 'N, D. or X to describe the degree of off -site Impact: <br />3) NOV Issued 8) Abated during or before OSM inspection N - Minor Occurrence <br />4) FTA -CO Issued 9) Follow -up of Federal Action D - Moderate Occurrence Re-d oaocor n, 2010 <br />5) IH -CO Issued 0) Off -site impact with no violation J - Major Occurrence <br />