2020-09-08_REVISION - M2012032 ‎(2)‎

• Permit No: M2012032
• IBM Index Class Name: Revision
• Doc Date: 9/8/2020
• Doc Name: Adequacy Review Response
• From: Ouray Silver Mines
• To: DRMS
• Email Name: LJW
• Media Type: D
• Archive: No

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OUR41 SL4ER/1?h1'Es
14. DRMS Comment: Provide the total job hours for the removal of all portal structures on site.
OSMI Response: The total job hours for the removal of all portal structures and safeguarding
underground openings has been provided in Exhibit L.
Vent Shafts
15. DRMS Comment:Regarding the vent shaft foundations, AM-1, D-29 states that the
foundations will be re-used for final closure however all other reclamation plans state that a
6"slab is to be poured over a steel plate. Please clarify if the existing pad canlwill be reused
and if not how will it be removed/disposed of.
OSMI Response: See updated Reclamation Plan(Attachment 4).
16. DRMS Comment: Will only the Monogahela escape shaft have a refuge made of two 40 x
10'sea cans stacked? While the 960 Raise and Yellow Rose Shafts only have a shaft house
and lift housing.
OSMI Response: The Monogahela escape shaft will be the only shaft with a refuge chamber
constructed of two stacked sea containers. The 960 Raise and Yellow Rose Shafts will only be
equipped with a shaft house and lift housing.
17. DRMS Comment:How will the Governor's Basin structures (2 sea cans-20'x10'lift
housing, 2 seacans-40'x10'refuge and 16'H x 121 x 12' W Steel structure on Beams
covered with Corrugated Metal-shaft house) be removed?Please give a brief description and
an updated User Provide Cost for removal of each structure.
OSMI Response: The Governor Basin structures will be cut up and placed down the shaft(see
response to Item 6). It is anticipated that this task will require approximately 40 hours to
complete.
18. DRMS Comment:Provide the anticipated total job hours for cutting the casing for each of
the three vent shafts.
OSMI Response: The anticipated total job hours for cutting the casing for each of the three vent
shafts is 10 hours. Exhibit L has been updated to reflect this estimate.
19. DRMS Comment:Provide the anticipated total job hours for placing the steel plate and
pouring a 6 inch cement cap on each of the three vent shafts.
OSMI Response: The anticipated total job hours for this task is 24 hours for each vent shaft.
Exhibit L has been updated to reflect this estimate.
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