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Mr. Jerald Schnabel <br /> November 24, 2019 <br /> Page 4 <br /> b. Open drainage paths and drop structures (ref. 2nd paragraph, p. G-3), <br /> c. Final detention basin near east edge of the permit (ref. 3rd paragraph, p. G-3), <br /> d. Northeast rout to sediment pond (ref. 41h paragraph, p. G-3), <br /> e. Small depressions (ref. 5th paragraph, p. G-3), <br /> f. Terrace channels and their flow directions (ref. I"paragraph, p. G-4), and <br /> g. Any other channels, ditches and ponds referenced in the reclamation plan. <br /> 18. Maintenance free stormwater facilities: DRMS experience suggests there is no such thing as <br /> a maintenance free stormwater control facility(ref. 5th paragraph, p. G-3). Please remove this <br /> statement from the narrative. <br /> 19. Curve Numbers, Table G-2: Two of the three proposed curve numbers in Table G-2 require <br /> some explanation. Please provide rationale for the following: <br /> a. The 71 proposed for "Reclaimed stockpile stockpile and slope" presumably <br /> references "Meadow"in TR-55, Table 2-2c, which is described as"continuous grass, <br /> protected from grazing and generally mowed for hay". As this is proposed wildlife <br /> habitat and will likely be grazed by bighorn sheep, it is likely more appropriate to use <br /> either 79 — TR-55, Table 2-2c: "Pasture, grassland, or range", assuming Fair cover; <br /> or 81 — TR-55, Table 2-2d: "Herbaceous—mixture of grass, weeds, etc.", assuming <br /> Fair cover. <br /> b. The 70 proposed for Pinion-Juniper with 25% cover. Referencing Table 2-2d—TR- <br /> 55, pinyon juniper for soil type B (< 30% is considered poor cover), it would seem <br /> 75 would be a more appropriate curve number. <br /> 6.4.12 EXHIBIT L—Reclamation Costs <br /> 20. Imported Material: The first paragraph of the Overview on p. L-2 states the plan calls for <br /> approximately 2,345,000 yd3 of imported fill material. Where are the costs for this material <br /> included in Exhibit L? <br /> 21. Material Swell: The first bullet lists the swell factor as 20%. It does not appear to be involved <br /> in the cut and fill volumes presented. Please explain where this factor is used in the earth <br /> moving balance. <br /> 22. Drill and Blast Material: The fifth bullet states 247,000 yd3 will be extracted by drilling and <br /> blasting. Worksheet Nos. 3 and 15C list 246,299 yd3. Please explain the extra 701 yd3. <br /> 23. Worksheets and Tables: There are 20 worksheets and tables included in Exhibit L with various <br /> numerical and alpha-numerical identifiers ("Worksheet No. 2" to "Table 50-A-26"). Given <br /> they are non-sequential, please provide an index for all the intended worksheets and tables. <br /> 24. Cross-References: There appears to be some lapses in the following references (please <br /> address): <br /> a. Worksheet No. 8B yields 7,246 hours for a Cat 345 loader that are to be used in <br /> Worksheet 13. There is no entry of 7,246 hours in Worksheet 13. <br /> C Users\TC1`,Documents,Projects'_EI Paso'W-77-211 Pikevew Quarry\AM-04 ReviseReckPAR-2010-11-24 Nl-77-211 docx <br />