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Exhibit 99.6

MINE SAFETY DISCLOSURE

The following table sets out the
information concerning mine safety violations or other regulatory matters
required by Section 1503(a) of the Dodd Frank Wall Street Reform and Consumer
Protection Act for the period January 1, 2014 through December 31, 2014 covered
by this report:

Mine
    Section 104(a)
      S&S Citations2 (#)
    Section 104(b)
      Orders3 (#)
    Section 104(d)
      Citationsand Orders4
      (#)
    Section 110(b)(2)
      **Violations5**(#)
    Section 107(a)
      **Orders6** (#)
    Total Dollar
      Value of MSHA Assess- ments
      Proposed7 ($)
    Total Number
      of Mining Related Fatalities
      (#)
    Received Notice of
      Pattern of Violations or
      Potential Thereof Under
      Section 104(e)8
      (yes/no)
    Legal Actions
      Pendingas of Last Day of
      Period9 (#)
    Legal Actions
      **Initiated**During Period
      (#)
    Legal Actions
      **Resolved** During Period
      (#)Arizona 1
    Nil
    Nil
    Nil
    Nil
    Nil
    $400
    Nil
    No
    Nil
    Nil
    NilBeaver/ La Sal1
    Nil
    Nil
    Nil
    Nil
    Nil
    $1,026
    Nil
    No
    Nil
    Nil
    NilCanyon1
    Nil
    Nil
    Nil
    Nil
    Nil
    $100.00
    Nil
    No
    Nil
    Nil
    NilDaneros1
    Nil
    Nil
    Nil
    Nil
    Nil
    $0.00
    Nil
    No
    Nil
    Nil
    NilEnergy Queen1
    Nil
    Nil
    Nil
    Nil
    Nil
    $0.00
    Nil
    No
    Nil
    Nil
    NilPandora1
    Nil
    Nil
    Nil
    Nil
    Nil
    $0.00
    Nil
    No
    Nil
    Nil
    NilPinenut
    1
    Nil
    Nil
    Nil
    Nil
    $2,930.00
    Nil
    No
    Nil
    Nil
    NilRim1
    Nil
    Nil
    Nil
    Nil
    Nil
    $0.00
    Nil
    No
    Nil
    Nil
    NilTony M1
    Nil
    Nil
    Nil
    Nil
    Nil
    $0.00
    Nil
    No
    Nil
    Nil
    NilWhirlwind1
    Nil
    Nil
    Nil
    Nil
    Nil
    $0.00
    Nil
    No
    Nil
    Nil
    Nil


| | 1. | The Companys Beaver/La Sal, Daneros, Energy Queen,
      Pandora, Rim, Tony M and Whirlwind mines were each on standby and were not
      mined during the period. Development activities occurred at the Canyon
      mine during the period.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
| | 2. | Citations and Orders are issued under Section 104 of the
      Federal Mine Safety and Health Act of 1977 (30 U.S.C. 814) (the Act) for
      violations of the Act or any mandatory health or safety standard, rule,
      order or regulation promulgated under the Act. A Section 104(a)
      Significant and Substantial or S&S citation is considered more
      severe than a non-S&S citation and generally is issued in a situation
      where the conditions created by the violation do not cause imminent
      danger, but the violation is of such a nature as could significantly and
      substantially contribute to the cause and effect of a mine safety or
      health hazard. It should be noted that, for purposes of this table,
      S&S citations that are included in another column, such as Section
      104(d) citations, are not also included as Section 104(a) S&S
      citations in this column.          
| |    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
| | 3. | A Section 104(b) withdrawal order is issued if, upon a
      follow up inspection, an MSHA inspector finds that a violation has not
      been abated within the period of time as originally fixed in the violation
      and determines that the period of time for the abatement should not be
      extended. Under a withdrawal order, all persons, other than those required
      to abate the violation and certain others, are required to be withdrawn
      from and prohibited from entering the affected area of the mine until the
      inspector determines that the violation has been abated.                                                                                                                                                                                                                                                                                                                                        
| |    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
| | 4. | A citation is issued under Section 104(d) where there is
      an S&S violation and the inspector finds the violation to be caused by
      an unwarrantable failure of the operator to comply with a mandatory health
      or safety standard. Unwarrantable failure is a special negligence finding
      that is made by an MSHA inspector and that focuses on the operators
      conduct. If during the same inspection or any subsequent inspection of the
      mine within 90 days after issuance of the citation, the MSHA inspector
      finds another violation caused by an unwarrantable failure of the operator
      to comply, a withdrawal order is issued, under which all persons, other
      than those required to abate the violation and certain others, are
      required to be withdrawn from and prohibited from entering the affected
      area until the inspector determines that the violation has been
    abated.
| |    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
| | 5. | A flagrant violation under Section 110(b)(2) is a
      violation that results from a reckless or repeated failure to make
      reasonable efforts to eliminate a known violation of a mandatory health or
      safety standard that substantially and proximately caused, or reasonable
      could have been expected to cause, death or serious bodily
  injury.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  

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| | 6. | An imminent danger order under Section 107(a) is issued
      when an MSHA inspector finds that an imminent danger exists in a mine. An
      imminent danger is the existence of any condition or practice which could
      reasonably be expected to cause death or serious physical harm before such
      condition or practice can be abated. Under an imminent danger order, all
      persons, other than those required to abate the condition or practice and
      certain others, are required to be withdrawn from and are prohibited from
      entering the affected area until the inspector determines that such
      imminent danger and the conditions or practices which caused the imminent
      danger no longer exist.                                     
| | -- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
| | 7. | These dollar amounts include the total amount of all
      proposed assessments from MSHA under the Act relating to any type of
      violation during the period, including proposed assessments for
      non-S&S citations that are not specifically identified in this
      exhibit, regardless of whether the Company has challenged or appealed the
      assessment.                                                                                                                                                                                                                                                                                                                                                                                                        
| |    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
| | 8. | A Notice is given under Section 104(e) if an operator has
      a pattern of S&S violations. If upon any inspection of the mine within
      90 days after issuance of the notice, or at any time after a withdrawal
      notice has been given under Section 104(e), an MSHA inspector finds
      another S&S violation, an order is issued, under which all persons,
      other than those required to abate the violation and certain others, are
      required to be withdrawn from and prohibited from entering the affected
      area until the inspector determines that the violation has been
    abated.                                                                                                                                                             
| |    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
| | 9. | There were no legal actions pending before the Federal
      Mine Safety and Health Review Commission as of the last day of the period
      covered by this report. In addition, there were no pending actions that
      are (a) contests of citations and orders referenced in Subpart B of 29 CFR
      Part 2700, (b) complaints for compensation referenced in subpart D of 29
      CFR Part 2700; (c) complaints of discharge, discrimination or interference
      referenced in Subpart E of 29 CFR Part 2700; (d) applications for
      temporary relief referenced in Subpart F of 29 CFR Part 2700; or (e)
      appeals of judges decisions or orders to the Federal Mine Safety and
      Health Review Commission referenced in Subpart H of 29 CFR Part
    2700.

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