2017-09-28_REVISION - M1981185 ‎(158)‎

• Permit No: M1981185
• IBM Index Class Name: Revision
• Doc Date: 9/28/2017
• Doc Name Note: Part 3 of 12
• Doc Name: Request For Amendment To Permit
• From: Sunrise Mining, LLC
• To: DRMS
• Type & Sequence: AM2
• Email Name: LJW
• Email Name: GRM
• Media Type: D
• Archive: No

Access Portal Collapse Repair and Equipment and Stope Rock Removal Work Plan
March 2, 2012
May Day No. 1
1.0 INTRODUCTION
proach to stabilizing and
This Work Plan presents Wildcat Mining Corporation's material approximdcaO ately 2,300 cubic yards) and
repairing the Access Portal, removal of collapsed mucker) at the mate (PP
buried equipment (jaw crusher, cone crusher and rock ortore from ll portal (within a st pe
removal of approximately 5,000 cubic yards of stockpiled
accessed by the May Day No. l Portal (Phase 2). The May Day Idaho
or do (Figure Complex is located
in La Plata County approximately 15 miles west of Durango,
n the Process of
Wildcat is proposing to operate the May Day ine Idaho M03674. Upon D activation,Complex and
0 and MSHA's
activating MSHA mine identification (ID) number
review and DBMS approval of this Work Plan, Wildcat will implement the corrective actions
described herein.
In April 2010, a collapse of the area surrounding s e Masmg the Ma portal
Day o.clurred. he a
collapse resulted in a cave in of two separate ad
historic access portal
the "Access Portal") and a load -out portal containing a mill (the "Mill
portal"). The May Day No. 1 Affected Area consists of a relatively flat pad, a mill and a main
access tunnel/adit (Photograph No. 1). The highwall above the collapsed portals is
with slopes inclined at approximately 0.5(H):1(V) (horizontal:
approximately 30 feet high p (Photograph No. 2 The fill slopes
vertical). Rock faces above the area are somewhat steeper ri120 0, a collapse blocked the
on the edges of the pad are approximately 1.5(H):l(V). P
the steel sets housing the mill in
first 15 to 20 feet of the Access Portal and the first 10 d an old landslide, which was nothe
Mill Portal (Photographs No. 3 and 4). The portals penetrate
accounted for in the original design or construction. Bedrock resistsforma ion shat theone of
mud
the Morrison Formation. It dips (east) into the highwall geologic
portals penetrate dip approximately 30 degrees away from the collapsed area. The collapse
appears be to the landslide/bedrock contact.
Following the collapse, MSHA issued an order (46445198) that prohibits all activity �n the
Day No. 1 Portal until MSHA has determined
hmt e t1D12 t is s safe amended Section operationsresume mining 12d permit
area. Wildcat submitted as Exhibit D,
application a Portal Collapse Repair Work Plan for the M = Day
f the collapse at both the A� ess
plan"). This Original Work Plan generally addressedp . Having agreement with the
Portal and the Mill Portal, but focused a at Howly on seeks to bihe furcated s approach to rehabilitation of
DBMS on the overall Work Plan,
the May Day No. l portal in order to better accommodate worker safety and the concerns of
' in its December 10, 2009 Order addressing Notice of Violation No. MV -2009-035, the Mined Land Reclamation
Board specifically addressed a proposal by Wilthat at t�The Operator iremove this s ordered t iled kcease and deor ore from si t from all e stope emining
y
the May Day No. 1 Portal, providing in part
related activities, we to
ith the exception 1of relocating 0 2009 Order, a02 cubic Wildcat now seeks in thof ore is Work Plan to remove same
the portal pad at Level 1 .... Dec.
5,000 cubic yards of rock or ore from the stope accessed by the May Day No. 1 Portal.
EnviroGroup Limited 1
DEN 97,749,013x3 2-29-12