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
5.7.2. Proposed Reclamation........................................................................................73
5.8. Operable Unit 8: Shop Building, Fuel Storage and Equipment ........................73
5.8.1. Previous Reclamation.........................................................................................73
5.8.2. Proposed Reclamation........................................................................................73
5.9. Operable Unit 9: Mill Site and Stormwater Pond................................................73
5.9.1. Previous Reclamation.........................................................................................73
5.9.2. Proposed Reclamation........................................................................................73
5.10. Operable Unit 10: Haul and Access Roads.........................................................74
5.10.1. Previous Reclamation.........................................................................................74
5.10.2. Proposed Reclamation........................................................................................74
6.0 AMENDED RECLAMATION PLAN SCHEDULE ......................................................75
6.1. Reclamation Activities..........................................................................................75
6.2. Ongoing Reclamation Monitoring........................................................................75
7.0 SUPPLEMENTAL MATERIALS AND ONGOING REPORTING...............................77
REFERENCES ....................................................................................................................78
ACRONYMS........................................................................................................................83
LIST OF TABLES
Table 2-1. Reclamation areas for each OU. ...............................................................10
Table 3-1. 10-year average flow rates (2009 -2018). ................................................23
Table 3-2. Number and percentage of monitoring points with movement above
their associated survey error(BGC, 2019b)..............................................54
Table4-1. Alpine seed mix. ........................................................................................65
LIST OF FIGURES
Figure 3-1. Southern Rocky Mountains (SRM) physiographic province. .....................14
Figure 3-2. Geologic map of the Pitch Mine area. Figure from Nash (1988). ..............15
Figure 3-3. Detailed map of Pitch Mine geology and structure. Figure from Nash
(1988). .......................................................................................................16
Figure 3-4. Geologic cross section of the Pitch Mine site. Location of profile B-B' is
shown in Figure 3-3. Figure from Nash (1988)..........................................17
Figure 3-5. Seismicity and fault of the Pitch Mine region. Seismicity from Petersen
et al. (2014). Faults from USGS (2018).....................................................19
Figure 3-6. Water balance catchment areas................................................................27
Figure 3-7. SW-33 flows, 2008 through 2018. .............................................................28
Figure 3-8. North Pit Catchment 2014 water balance..................................................30
EXHIBIT E-RULE 6.4 5(AMENDED RECLAMATION PLAN) Page iii
HOMESTAKE MINING COMPANY