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6.4.5 — 1 Typical Section, the slope will be backfilled to 3H:1 V with overburden <br /> stored to the west of Reservoir#2. This controlled backfill shall be placed in 8" <br /> lifts to 95% standard proctor maximum dry density at 0 to +3% optimum moisture <br /> content. Following backfilling of the slopes, a protective shell shall be <br /> constructed from the ground surface above to 1 Oft below the normal pool <br /> elevation. The specifications for the protective shell are given in Figure 6.4.5 — 1 <br /> Typical Section. Following Mining of Cell 4, reclamation / construction of <br /> Reservoir #4 will occur in the same fashion as Reservoir#2. <br /> Table 6.4.5-2. Weathered Claystone Geotechnical Data <br /> PASSING PERME <br /> MOISTURE DRY LIQUID PLASTICITY #200 - <br /> BORING CELL DEPTH CONTENT DENSITY LIMIT INDEX SIEVE ABILITY <br /> N [%] [PCF] [%] [cm/sec] <br /> TH-2 4 24 12.6 124 39 22 <br /> TH-3 4 24 9 120 36 19 94 <br /> TH-5 4 24 13.6 121 44 25 91 <br /> TH-5 4 29 12.7 123 39 22 93 6X10-8 <br /> TH-9 4 24 11.9 121 41 23 77 <br /> TH-11 2 19 10 119 33 18 91 <br /> TH-11 2 29 9.3 107 35 20 94 <br /> TH-14 2 49 12.4 ND 38 24 64 <br /> TH-16 2 29 9.6 130 40 28 98 <br /> TH-19 2 31-34 20.3 ND 36 21 58.9 <br /> Compacted Clay Liner Quality Assurance/Quality Control Plan <br /> Please see Attachment 6.4.5 — 1 <br /> Fallowing construction of the compacted clay liner final construction report and <br /> certification for the pit liner shall be completed and submitted to the Division. <br /> The operator shall commit to no modifications to the de:>ign specifications without <br /> prior Division approval. <br /> (b) Post Mining Land Use Comparison <br /> The site is currently used as a developed water resource facility and is consistent <br /> with the Town of Lafayette's master plan. Other land uses surrounding the site <br /> include rural residential and agricultural and Boulder County Conservation <br /> easements. The Goose Haven reservoir site is compatible with those land uses. <br /> (c) Description of How the Reclamation Plan will Meet the Requirements of <br /> Section 3.1 <br />