2009-10-16_REVISION - M1977036 (8)

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(M*W, TETRA TECH 6.4.4 EXHIBIT D - Mining Plan Page 2 of 8 Mr. Jared Ebert October 16, 2009 3. Please display the location of the sediment ponds on the Mining Plan Map. There are two ponds that are shown on the map. One is East Pit Mining Cell which is also labeled as an "Existing Silt Pond Area" and there is a "Future Silt Pond Area " shown within the South Central Pit. 4. According to page D3 of the mining plan, you state that Lafarge will maintain a 100 foot setback from the Cache la Poudre River. The mining plan map indicates that the present mining boundaries and the proposed mining boundaries are not 100 foot setback. They are indicated to be much closer than 100 feet for the majority of the site. Please update the mining plan map and re-draw the mining boundaries to be located at the 100 foot setback. To clarify, on page D3 we state: "For mining on the Lafarge Brown Property, Lafarge will maintain a 100' mining setback from the Cache la Poudre River. The Lafarge Brown Property is the parcel that is being added to the existing 35`h Avenue Mine site with this application. With this amended application, Lafarge will maintain this 100' setback from mining on the Lafarge Brown property as shown on Exhibit C. We noticed that our dimension arrows that were shown on page 3 of Exhibit C next to the "100' MIN. SETBACK FROM TOP OF RIVER BANK" note did not scale at exactly 100' and so we adjusted the plan to accurately represent what is stated in the note. We also added clarifying language to the note to make it clear that we were only referring to the setback for the area being added to the existing permitted area. 5. Please state the exact amount of topsoil and overburden that will be stripped. Please keep in mind all topsoil removed will need to be used for reclamation. While we can't provide exact amounts, based on the drilling log information that we have, we have provided an estimate of this information on page DI of Exhibit D. Attached is an updated version of Exhibit D. 6.4.5 EXHIBIT E - Reclamation Plan 6. On page El you state topsoil will be segregated and stored separately from the overburden material. However, on page D2 you stated there will be no permanent stockpiles of overburden and topsoil on the property. Please explain these statements; it is unclear if topsoil and overburden will be stockpiled on the property during mining. If you will temporarily store topsoil and overburden please show where these piles will be located on the mining plan map. Topsoil and overburden will be stripped from the property and stored in separate piles as indicated on page El as is required by the DRMS. The key word in the statement that was made on page D2 is "permanent" as there will be no permanent piles. All piles will be temporary in that the material will be temporarily stored down in the mining cells until it can be used for reclamation or immediately placed in the reclamation slope. Due to the location of the floodplain and floodway on this property, all topsoil and overburden will be stored in piles down in the mining cells. We have added a note (note 3) to page 3 of Exhibit C to clarify this. In addition, to