2012-10-05_REVISION - M1977342 (14)

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Climax Molybdenum Company HENDERSON MINE & MILL SWMP Empire & Parshall, CO December, 2011 Page iv Rev # Rev Date Revised By: Description of Revisions • Combined the Urad and Mine/Mill SWMPs 5 2/2007 Aquionix, Inc. Incorporated new requirements of new general permit and to reflect removal of Urad information. 6/2007 Aquionix, Inc./W. Katz Minor changes to table 4.1 and 5.1; removal of obsolete potential pollutant sources; include reference to Appendix D in Table of Contents. Formal re-rev of entire document not deemed necessary. 6 7/2007 Aquionix, Inc. Update Tables 4.1 and 5.1 to reflect BMP improvements identified during periodic inspection; improve description of storm water diversions; include list of outfalls in Plan (in addition to list in inspection sheets); improve narrative discussion in inspection sheets. 6 12/2007 Aquionix, Inc./W. Katz Added detail to area specific BMP discussions, corrected locations of 2 outfalls, added new outfalls and revised/expanded maps. 7 6/2008 Aquionix, Inc./W. Katz • Added storm water outfalls OF-8c, OF-14, OF-15, and OF-M19. • Updated storm water maps to include new outfall locations. • Updated storm water maps to include pollutant sources O-1 through O-5. • Updated Tables 4.1 and 5.1 to include new outfalls. 8 11/2008 Aquionix, Inc. • Added storm water outfall OF-16. • Updated storm water maps to include new outfall location. • Updated Tables 4.1 and 5.1 to include new outfall. • Changed text in Table 5.1 for outfalls OF-1 and OF-8c. 9 11/24/09 Aquionix, Inc. • Removed storm water outfall OF-16. • Updated storm water maps to include new and updated BMP’s. • Updated Tables 4.1 and 5.1 by deleting outfall. • Updated Semi-Annual SWMP Compliance Inspection Form for the Mine (Appendix B). • Revisions completed on this date were insignificant in nature, thus it was deemed unnecessary to complete a new certification sheet. A copy of the signed signature sheet from Revision #8 will be inserted into this document. 10 12/2010 Aquionix, Inc. • Added storm water outfalls OF-16 and OF-M20. • Updated Semi-Annual SWMP Compliance Inspection