APPCOR13042

• Permit No: C2006085
• IBM Index Class Name: Application Correspondence
• Doc Date: 5/10/2007
• Doc Name: Adequacy Response Letter
• From: Environmental Alternatives Inc
• To: DRMS
• Media Type: D
• Archive: No

10. Mine office dimensions and foundation details were provided on general
construction information included on Table 2.05.3-2, pages 2.05.3-24 and 25.
11. Bathhouse dimensions were provided on general construction information
included on Table 2.OS.3-2, pages 2.OS.3-24 and 2S.
12. Septic system information was added in permit page 2.05.3-23, and additional
details were provided on general construction information included on Table
2.OS.3-2, pages 2.05.3-24 and 2S.
13. Crushing and screening plant foundation details were provided on general
construction information included on Table 2.05.3-2, pages 2.05.3-24 and 25.
14. Truck scale dimensions were added to the pennit on general construction
information included on Table 2.05.3-2, pages 2.05.3-24 and 25. A scale house
was added to the permit text on page 2.05.3-18, and additional details were added
in the general construction information included on Table 2.05.3-2, pages 2.05.3-
24 and 25.
15. Topsoil stockpile discussion on permit page 2.05.3-18 was edited to include a
reference to additional topsoil information on permit pages 2.05.4-6 thru 8.
16. Road design information and profiles were developed by the Applegate Group
and added as a report in Exhibit AA.
17. Power transmission lines and associated equipment information was edited on
pages 2.05.3-22 and 23, and provided in the general construction information
included on Table 2.05.3-2, pages 2.05.3-24 and 25. Surface power distribution
information was included on Map 12, referenced below in response no. 19.
18. Topsoil salvage was revised to include a recovery depth of approximately 10
inches. Permit text on pages 2.04-26, 2.05.3-29, and 2.05.4-6 was edited to reflect
the change in soil recovery depth. Estimated topsoil volume and associated
recovery areas, including average swell and compaction factors, were determined
and were included on permit Table 2.05.4-1, page 2.05.4-7.
19. Mine facilities details were removed from Map 1. A new facilities map was
drafred, final edits and certification are close to completion. The map will be
forwarded to the Division upon receipt by Northfield. Map 12 is reserved for the
Proposed Facilities Map.
20. A chart of all facilities was compiled along with general construction information
included on Table 2.05.3-2, pages 2.05.3-24 and 25.
21. Overburden volumes, including swell and compaction information, were edited
out of the discussion on permit pages 2.05.3-24 and 25. Northfield has added
permit Exhibit AC that includes cross-sections of the mine bench, with volume
calculations based on swell and compaction factors taken from the Caterpillar
Performance Handbook.
22. Production of refuse from the crushing and screening plant was evaluated and a
plan for an on-site permanent refuse pile was added to the permit on pages 2.05.3-
19 and 20. Location of the refuse pile was included on Map 12, referenced above
in response no. 19.
23. Storage area information, including areas for mine supplies and metal salvage,
were added to the permit on pages 2.05.3-15 and 16.
24. Typo on permit page 2.05.4-1 is corrected.
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402 Valley Rd, Suite G, Canon Ciry, CO 81212 ;~ 81212
www.envalternatives.com • e-man: eai~bresnan.net
Phone: [phone] • Cell: 719-429-8950