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25. A statement regarding obtaining approvals to bury demolition debris on site prior <br />to reclamation was added to the permit text on page 2.05.3-9 and 2.05.4-4. <br />26. The volume of salvaged topsoil was estimated by measuring azeas on the map that <br />will be disturbed for construction of the facilities. This azea is less than the 20 <br />acres of disturbance, as stated several times in the permit application, because the <br />20 acres is the azea within the proposed disturbance boundary -this includes <br />pieces that will not be disturbed. Estimated topsoil volume and associated <br />recovery azeas, including average swell and compaction factors, were determined <br />and were included on permit Table 2.05.4-1, page 2.05.4-7. <br />27. Sealing methods for the portal and shaft openings were drawn and included as <br />permit Figure 2.05.4-2, page 2.05.4-16, and Figure 2.05.4-3, page 2.05.4-17. <br />Additional permit modifications as a result of the aforementioned adequacy issues <br />include: <br />1. Exhibit V, Drainage and Sediment Control Plan, required changes to include 100- <br />year storm event flow designs for ditches as a result of adding the refuse pile <br />structure. A revised plan and map was drafted, final edits and certification are <br />close to completion. The plan will be forwarded to the Division upon receipt by <br />Northfield to replace the existing plan in Exhibit V. <br />2. Map 4, Extent of Abandoned Mine Workings, was edited to reflect changes in the <br />proposed permit boundary. <br />3. Map 5, USGS Reconnaissance Map, was edited to reflect changes in the proposed <br />permit boundary. <br />4. Map 6, USGS Geologic-Hazards Map, was edited to reflect changes in the <br />proposed permit boundary. <br />Please call me directly at 719-275-8951 if you have any question. <br />Respectfully submitted, <br />Angela M. Bellantoni <br />Enclosures: <br />• Summary Chart <br />• Volume 1 Text Packet <br />• Volume 1 Maps <br />• Volume 2 Exhibits <br />• New Volume 3 Exhibits <br />~~ C~Va~®~~~~k~n ~Ilke~~~~w~5q II~~~ ~~ Ilncc„ <br />402 Valley Rd, Suite G, Canon City, CO 81212 ,~ 81212 <br />www.envalternatives.com • e-mail: eai~bresnan.net <br />Phone: 719-275-8951 • Cell: 719-429-8950 <br />