2019-06-28_REVISION - M1977004 ‎(11)‎

• Permit No: M1977004
• IBM Index Class Name: REVISION
• Doc Date: 6/28/2019
• Doc Name: Request For Amendment To Permit
• From: Homestake Mining
• To: DRMS
• Type & Sequence: AM1
• Email Name: DMC
• Email Name: THM
• Media Type: D
• Archive: No

Homestake Mining Company May 10,2019
Regular(112d)Operation Reclamation Permit Application Package
3.4.3. Current Slope Movement Conditions..................................................................45
3.4.3.1. Surficial Mapping of Landslide Features...................................................45
3.4.3.2. Inclinometers.............................................................................................46
3.4.3.3. Survey Point Network................................................................................54
3.4.3.4. Other Observations...................................................................................55
4.0 RECLAMATION OBJECTIVES .................................................................................56
4.1. Design Objectives.................................................................................................56
4.2. Long-term Geotechnical Stability........................................................................56
4.3. Water Quality—Surface and Groundwater.........................................................56
4.3.1. Regulatory Context.............................................................................................57
4.3.2. Best Management Practices to Define and Achieve Lowest Practical Level ......58
4.3.2.1. Sediment Control Structures.....................................................................58
4.3.2.2. Water Infiltration Management and Segregation.......................................59
4.3.2.3. Passive Water Treatment..........................................................................60
4.3.2.4. Source Zone Uranium Load Reduction via Phosphate Injection...............60
4.4. Post Mining Land Uses —Wildlife and Grazing ..................................................61
4.4.1. Wildlife ................................................................................................................62
4.4.2. Water Resources ................................................................................................62
4.4.3. Slope Gradients ..................................................................................................62
4.4.4. Topsoil and Growth Medium ...............................................................................63
4.4.5. Revegetation.......................................................................................................63
4.4.6. Roadways for Future Public Access ...................................................................66
5.0 RECLAMATION PLAN ..............................................................................................67
5.1. Operable Unit 1: North Pit....................................................................................67
5.1.1. Previous Reclamation.........................................................................................67
5.1.2. Proposed Reclamation........................................................................................67
5.2. Operable Unit 2: South Pit....................................................................................68
5.2.1. Previous Reclamation.........................................................................................68
5.2.2. Proposed Reclamation........................................................................................68
5.3. Operable Unit 3: Indian Rock Dump....................................................................69
5.3.1. Previous Reclamation.........................................................................................69
5.3.2. Proposed Reclamation........................................................................................69
5.4. Operable Unit 4: Tie Camp Rock Dump ..............................................................70
5.4.1. Previous Reclamation.........................................................................................70
5.4.2. Proposed Reclamation........................................................................................71
5.5. Operable Unit 5: Water Management System.....................................................71
5.5.1. Previous Reclamation.........................................................................................71
5.5.2. Proposed Reclamation........................................................................................71
5.6. Operable Unit 6: Sandstone Quarry ....................................................................72
5.6.1. Previous Reclamation.........................................................................................72
5.6.2. Proposed Reclamation........................................................................................72
5.7. Operable Unit 7: Limestone Quarry.....................................................................72
5.7.1. Previous Reclamation.........................................................................................73
EXHIBIT E-RULE 6.4.5(AMENDED RECLAMATION PLAN) Page ii
HOMESTAKE MINING COMPANY