| Filed On | Filing |
|---|---|
| 21 Mar 2018 | 8-K/A: Financial Statements and Exhibits |
| 09 Nov 2017 | 8-K/A: Departure/Election of Directors or Officers; Compensation |
| 02 Aug 2017 | 8-K/A: Departure/Election of Directors or Officers; Compensation |
| 25 Jun 2014 | 8-K/A: Financial Statements and Exhibits |
| 21 Sep 2012 | 8-K/A: Mine Safety: Reporting of Shutdowns and Patterns of Violations |
| 23 Sep 2011 | 8-K/A: Submission of Matters to a Vote of Security Holders |
| 17 Mar 2011 | 8-K/A: Other Events |
| 06 Aug 2010 | 8-K/A: Financial Statements and Exhibits |
| 16 Jul 2010 | 8-K/A: Financial Statements and Exhibits |
| 22 Mar 2010 | 8-K/A: Financial Statements and Exhibits |
| 27 Feb 2008 | 8-K/A: Departure/Election of Directors or Officers; Compensation |
| 15 Nov 2005 | 8-K/A: Departure/Election of Directors or Officers; Compensation |
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