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C- 2010 -088 Fruita Loadout <br />3rd Preliminary Adequacy Review (MLT) <br />20 -Jul -2011 <br />Page 7 of 10 <br />5lh.On page 2.05 -9, please elaborate on the source of "clean" dirt (there may also be a better <br />term to use). <br />GAM substituted "fill "for "clean dirt'; and clarified on page 2.05 -9 that the construction <br />material borrow area will be the source offill to cover unsuitable subgrade material <br />placed in Evaporation Pond No. 6. Item resolved <br />Access Road <br />51i. No profile or typical section for the Access Road are shown on Map 15. Please add these <br />details to Map 15. <br />Typical section and profile were added to Map 15, as requested Text was added to page <br />2.05 -14 to address surfacing of the access road, but this text (and the thickness shown on <br />Map 15) are in conflict with text already provided on page 2.05 -15. That paragraph states <br />that 6 to 12 inches ofgravel will be used. Given the poor quality of native soils at the site, <br />a 6- to 12 -inch thickness is likely to be necessary for surfacing the Access Roam Please <br />revise Map 15 accordingly and delete the contradictory information from page 2.05-14. <br />5lj. Page 2.05 -9 describes what will be done with unsuitable materials encountered in <br />construction of the Rail Loop. Please use similar language to address the handling of <br />unsuitable materials encountered in construction of the Access Road. <br />This issue is now covered under the general statement regarding unsuitable subgrade <br />material that has been added to page 2.05-9. Item resolved. <br />Light Use Road <br />The Light Use Road appears in cross sections on Map 12 (both fill and cut situations), and in <br />Section A -A' on Map 21 (Rail Loop cut section). The first paragraph on page 2.05 -16 of the <br />application indicates that the light use road runs parallel to the rail loop, is nearly level, and is <br />about 1.5 miles long. <br />51k.In Exhibit 16, the Union Pacific STD DGW 0001B includes Note 4 which states, "Where <br />off -track roadway is to be provided, add 10' -0" additional width to the roadbed section at <br />top of selected material elevation." It is not clear whether this is the proposed method of <br />construction of the Light Use Road, or whether other materials will be used. Please describe <br />the materials proposed for construction of the Light Use Road. <br />Page 2.05 -16 has been revised to indicate that the light use road will be constructed by <br />adding 10 feet of width to the rail loop roadbed section at the top of selected material (sub - <br />ballast) elevation. Item resolved. <br />511. The outer slope on Map 12 is shown as 2 :1, with 2:1 bermed ditch located downslope. Is a <br />ditch of this configuration feasible to build/maintain on a 2:1 steep slope? The Division <br />suggests that a preferred alternative may be to install silt fence or excelsior erosion logs on <br />or at toe of slope, due to the small disturbed area and flat grades. <br />GAM responded that no changes will be made to the design. Response accepted. <br />