2019-06-28_REVISION - M1977004 ‎(12)‎

• 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 June 17,2019
Regular(112d)Operation Reclamation Permit Application Package
1.0 INTRODUCTION
The Pitch Mine (or Mine) is owned and managed by Homestake Mining Company (HMC) as a
subsidiary of the Barrick Gold Corporation (Barrick). The Mine is located in the Sawatch Range
of Saguache County within the Gunnison National Forest, in a high alpine environment with
elevations ranging from 10,000 to 11,000 feet (ft) above mean sea level (amsl), five miles East of
Sargents, Colorado and 18 miles southwest of Salida, Colorado (see Exhibit B Map 01). Access
to the site from Sargents is via the unpaved Marshall Pass Road (USFS Road 243) and then via
USFS Road 243.2A.
The mining related surface disturbances have been subdivided into manageable operable units
(OUs) that define the physical boundaries or limits between areas to allow for incremental and
progressive reclamation. The proposed OUs used in developing this amended Reclamation Plan
were defined as follows, are represented on Exhibit B Maps 03A and 036:
1. OU 1 North Pit, which consists of the generally reclaimed North Pit slopes, partially
backfilled and revegetated North Pit, North Pit Ditch, North Pit Lake, tension cracks,
internal access roads, three inclinometers and 81 slope monitoring points.
2. OU 2 South Pit,which consists of the backfilled and revegetated South Pit, South Pit Ditch,
tension cracks, internal access roads, 24 slope monitoring points. The two water
management systems areas are included as part of OU 5.
3. OU 3 Indian Rock Dump (IRD), which consists of a reclaimed cross valley fill rock dump
slope, Sericite Clay stockpile, Low Grade ore stockpile, internal access roads, three
inclinometers and three slope monitoring points.
4. OU 4 Tie Camp Rock Dump (TCRD), which consists of a reclaimed cross-valley fill rock
dump slope, Disposal cell, Low Grade ore stockpile and internal access roads.
5. OU 5 Water Management System(WMS)which consists of open surface water drainages,
the reclaimed Radium Treatment Plant (RTP), the former Water Treatment Plant
(consisting of a sand filter plant on the southwest side of the Sediment Dam), and
Sediment Pond. While the reclaimed Pinnacle Adit and workings are physically located
within the South Pit OU limits, it is considered part of the WMS OU due to the water quality
issues.
6. OU 6 Sandstone Quarry.
7. OU 7 Limestone Quarry.
8. OU 8 Shop Building, Fuel Storage and Equipment.
9. OU 9 Mill Site and Stormwater Pond.
10. OU 10 Haul and Access Roads,which consists of the access road to the Mine,and internal
haul and access roads. that are not bound within the other OUs.
A Standardized Reclamation Cost Estimator (SRCE) model was prepared by BGC Engineering
US, Inc. (BGC) and Arcadis U.S., Inc. (Arcadis) to estimate the required financial bond to be
posted with the State of Colorado Division of Reclamation, Mining and Safety (CDMRS) for each
OU are discussed in Exhibit E (Amended Reclamation Plan).
EXHIBIT L-RULE 6 4.12 (RECLAMATION COSTS)(Revised June 17,2019) Page 1
HOMESTAKE MINING COMPANY