2015-12-10_PERMIT FILE - M1980003

• Permit No: M1980003
• IBM Index Class Name: Permit File
• Doc Date: 12/10/2015
• Doc Name: Reclamation Report & Reclamation Responsibility Release
• From: Climax Molybdenum
• To: DRMS
• Email Name: MAC
• Email Name: WHE
• Media Type: D
• Archive: No

Climax��UM
A Freeport-McMo
Henderson Operations
P.O. Box 68
Empire, CO 80438
[phone]
Fax: [phone]
Buckskin KL-1 Closure Methodology
Date of Report: 9/23/2015
Operation (Site) Name: Buckskin (P-1980-003)
Operator: Freeport McMoRan (FMI) acting on behalf of Climax Molybdenum Company
Notice of Intent (NOI)file number: P-1977-027
This document summarizes the borehole closure methodology that was approved by DRMS and
conducted to close the Buckskin KL-1 borehole.
Rocks were dropped into Buckskin KL-1 to determine the presence of water at a depth within the
borehole.Water was not heard; however, the rocks immediately hit previously placed rocks or soil within
the casing. It was therefore inferred that the hole was not groundwater influenced and previously placed
rocks and soil were less than one foot below ground surface (bgs). The following procedure was
implemented to reclaim the drill hole:
• Removal of casing
o Manual excavation around the casing to a depth greater than one foot, to facilitate casing
removal
o Exposed pipe was cut to a depth of one foot below ground surface using an angle grinder
• Capping
o Concrete (120 lbs. dry)was prepared to specifications on the product packaging
o Concrete was poured into the exposed hole from the top of the casing and allowed to flow
over the casing to fill the surrounding ground surface to a depth above the cut casing to
provide a concrete cap
• Backfilling
c Disturbances to the local grade were repaired by backfilling around the concrete plug by hand
and compacting the reworked earth material. Large stones were removed from the excavated
soil and that material was placed atop the concrete cap to be level with the ground surface
after light compaction.
• Reseeding
o Hand reseeding was conducted using a seed mix approved by DRMS and the U.S. Forest
Service at an average application rate of 80 live seeds per square foot
o Seed was lightly raked into the surface
• Removal of all construction and/or closure debris in vicinity of borehole
• Photo documentation of the closure process
The attached photos document the closure process of the Buckskin KL-1 borehole with annotations about
each step of the process. Final borehole closure was completed on August 24, 2015.