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<br />Mr. Gregg Squire <br />August 26, 1999 <br />Page 2 <br />5) Enclosed are two copies of all the maps with the appropriate signature. ~ <br />6) The following information is in response to the memo from Allen Sorenson dated June <br />21, 1999. The responses are presented in the same order as his comments. <br />The applicant will construct all reclaimed pit slopes at 3H:1 V. Attached in the <br />slope stability analysis, aze copies of bore logs for groundwater piezometers. ~ <br />These indicate bedrock is between l 1 and 16 feet below the surface at the corners ~ <br />of the site. We do not expect the areas in the center of the site to vary <br />significantly. For more information, please see the attached slope stability <br />analysis. <br />Z <br />2. Please see the attached revised slope stability analysis for a discussion of this - <br />concern. <br />3. We have recently let a contract for another client to construct a water storage Z <br />reservoir using the same liner backfill construction method for $0.87/ cy. in the <br />north metro area. The bond estimate for the Wellington Downs Pit, permitted to <br />Connell (M-95-035) immediately to the west of this site, used the same $1.25/ cy. <br />for the backfill and creation of the exact same reservoir liner construction. We <br />believe our estimate for the cost is appropriate. <br />4. The french drain has been revised to a different method of moving the water Z <br />around the site. Please refer to the attached explanation of the groundwater - <br />capture and recharge system. <br />S. The french drain has been revised to a different method of moving the water / <br />azound the site. Please refer [o the attached explanation of the groundwaterQlt~~ <br />capture and recharge system. <br />6. The reclamation plan has been revised for vazious reasons. The closest reclaimed <br />pit slopes to the edge of the Cache la Poudre River is now approximately 400 feet. <br />The Urban Drainage and Flood Control District recommendations for gravel pits b <br />in the South Platte River basin indicate that a 400 foot sepazation is adequate for a <br />stable reclaimed shoreline during a 100 year flood event. We believe this <br />reclaimed pit configuration will be stable during a flood event. <br />