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developed and implemented plans to clean-up and dispose of trash, debris, and other materials in the dump area,
<br />and to stabilize effected access and clean-up areas. A contractor established access into the dump area and removed
<br />old vehicles, metal, rubber, and other debris, and removed several partially full barrels or drums to a lined pit in a
<br />staging area. The materials and debris were transported off-site to salvage or licensed landfill facilities, and liquids
<br />were collected and disposed of by licensed disposal contractor. Once the clean-up was completed, disturbed areas
<br />were regraded and stabilized, erosion control materials (wattles) were placed to minimize runoff and control
<br />sediment, and the disturbed areas were reseeded. A Minor Revision (MR15-54), providing documentation of the
<br />clean-up activities in the PAP was submitted and approved by the CDRMS.
<br />Late in 2016, MCM's contractor initiated limited site demolition activities, dismantling the conveyor and related
<br />structures in the 5A/6 Portal Area. The conveyor equipment and structures were staged on-site and subsequently
<br />loaded and transported to Peabody's Sage Creek property for long-term storage and potential future re -use. The
<br />site demolition activities continued during 2017 with demolition and removal of the 5A/6 portal structures, the
<br />conveyor and related structures from the 5A/6 Portal Area to the Stacking Tube and from the Stacking Tube to the
<br />Coal Silo, the Stacking Tube, the coal handling structures, and the de-icing system. The rails, ties and ballast have
<br />been removed from the rail spur, and demolition and removal of the bridge deck for the railroad bridge over the
<br />Williams Fork River has been completed. An experienced explosive demolition contractor was hired to demolish
<br />the Stacking Tube and Coal Silo. Both were shot at the same time, with successful demolition of the Stacking
<br />Tube, however the Coal Silo did not completely collapse, and remains standing (although deflected at an angle in
<br />the planned direction of fall). The contractor has developed a plan to safely complete demolition of the Silo, and
<br />the plan has been reviewed by an independent third -party engineering firm. The contractor currently plans to
<br />complete demolition of the Silo during first- or early -second quarter 2018. MCM currently anticipates that site
<br />demolition work will continue and be completed during 2018, and that subsequent site -grading and other
<br />reclamation work will be initiated during 2018 and continue into 2019.
<br />Monitoring and Maintenance
<br />During 2006, the frequency of surface and ground water monitoring was increased to provide updated hydrologic
<br />information, in the event that Peabody Energy (MCM's parent company) decided to pursue further exploration and
<br />feasibility evaluations for the Williams Fork property, and the more intensive hydrologic monitoring continued
<br />during 2007 -through 2012.
<br />Ongoing maintenance activities included inspection and clean-out of drainage structures (as needed), and focused
<br />weed control activities under our Noxious Weed Management Program. Limited rodent -control activities occurred
<br />during 2015. The 2005-2007 control efforts were effective in significantly reducing the ground squirrel population,
<br />and while rodents are still observed on the property, population numbers seem to have stabilized. A joint
<br />CDRMS/OSMRE inspection in November 2013 identified several site maintenance items requiring attention.
<br />Given snow -cover, and that none of the identified items represented any immediate health, safety, or environmental
<br />danger, action on these items was deferred until spring when ground conditions were suitable for required access
<br />and equipment operations, and were completed during the 2014 field season. A joint CDRMS/OSMRE inspection
<br />on 05/17/17 resulted in no additional maintenance items. In addition, several maintenance items were identified
<br />during subsequent CDRMS site inspections. The following specific items were addressed by the 2017 site
<br />maintenance activities:
<br />• Installed additional buffer -zone signs along the Williams Fork River in areas where there is potential for
<br />disturbance associated with site demolition/reclamation activities
<br />• Potable water well (artesian) was leaking, so contractor was hired to place a temporary plug and to replace
<br />well cap and valve
<br />Spot and area spraying efforts were expanded for noxious weeds in 2011-2012 to address an increase in weed
<br />occurrences due to climatic factors, and several areas where weed infestations had been identified and treated
<br />before, as well as any new infestations were sprayed during 2013-2017. In 2017, limited spraying was completed
<br />by the site agricultural leasee. Primary targeted weed species included Russian knapweed, hoary cress (white -top),
<br />Canadian thistle, and hound's -tongue. Selective herbicide applications utilized Roundup, Ammonium Sulfate,
<br />Intense, Liberate, Escort, and Activator 90. Spot or aerial spraying was conducted in May and October, and
<br />covered a total of approximately 35 acres. The agricultural lease also treated, plowed, and planted previously
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