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PROPOSED DECISION - Canadian Strip/Phase II Bond Release <br /> October 1 , 1990 <br /> Page 3 <br /> TABLE 2: Summary of SEDCAD+ <br /> Results Using the Upland Particle Size Distribution in the Analysis <br /> Runoff Peak <br /> Mining Volume Discharge Sediment <br /> Watershed Situation (ac-ft) (cfs) (tons) <br /> 1 Pre- 2.06 12.61 12.8 <br /> 1 Post- 1 .90 15.26 3.3 <br /> 2 Pre- 1 .08 8.78 5.3 <br /> 2 Post- 1 .04 4.99 4.5 <br /> 3 Pre- 0.22 2.25 1 .1 <br /> 3 Post- 0.05 0.45 0.1 <br /> TABLE 3: Summary of SEDCAD+ <br /> Results Using the Sediment Pond Particle Size Distribution in the Analysis <br /> Runoff Peak <br /> Mining Volume Discharge Sediment <br /> Watershed Situation (ac-ft) (cfs) - -(tons) " <br /> 1 Pre- 2.06 12.61 12.8 <br /> 1 Post- 1 .90 15.26 3.3 <br /> 2 Pre- 1 .08 8.78 5.3 <br /> 2 Post- 1 .04 4.99 4.5 <br /> 3 Pre- 0.22 2.25 1 .1 <br /> 3 Post- 0.05 0.45 0.1 <br /> On June 20, 1990, a partial inspection focusing on erosional stability <br /> was performed at the Canadian Strip Mine. In attendance were Cathy Begej <br /> and Susan McCannon, of CMLRD, Mark Humphrey, of the OSM WTC in Denver, <br /> Jeff Zingo, of OSM Albuquerque Field Office and Bill Hill , Greystone <br /> Development Consultants and permitting liaison for Wyoming Fuel Company' s <br /> request for Phase II Bond Release. <br /> Mark Humphrey had worked extensively with a classification system on <br /> erosion developed by Ronnie Clark and described in USDI-BLM Technical <br /> Note #346, Erosion Condition Classification System. This document <br /> describes a method for quantifying the degree of erosion at a site and <br /> the subsequent.organization of the data into erosion classes entitled <br /> stable, slight, moderate, critical or severe erosion conditions. In <br /> addition, the document suggests that the moderate erosional condition <br />