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II West Coal Refuse Facility General Information and Credits <br />Sedimentation Pond E Retaining Stnrcture <br />8.0 GENERAL INFORMATION AND CREDITS <br />Professional judgments, analysis, and evaluations are presented in this report. They are <br />based partly on information gathered during our reconnaissance; partly on information <br />provided by the Owner; and partly on our general experience with similaz projects. We <br />do not guarantee the performance of the project in any respect, only that our engineering <br />work and judgments rendered meet the standard of care of our profession. <br />• <br />• <br />Test pits excavated by MWH for the geotechnical investigation were spaced to obtain a <br />reasonable chazacterization of the subsurface conditions for design purposes. Variations <br />from the conditions portrayed by test explorations frequently occur. These variations <br />should be considered and properly addressed in subsequent phases since such variations <br />can also be sufficient to necessitate modifications in subsequent design and construction. <br />The construction of retention structures involves the use of natural materials, which by <br />their very nature vary so much that it is not possible to-cover all eventualities in design. <br />This necessitates guidance in decisions at all stages of additional investigations, design <br />and construction made by competent and experienced personnel. <br />MWH's services were performed within the limits prescribed by our Clients, with the <br />usual thoroughness and competence of the engineering profession. No other <br />representation, either expressed or implied, is included or intended in our proposals, <br />contracts, or reports. <br />This report was prepared by Michael J. Mi]]er, P.E., Project Engineer, Jerry Nettleton was <br />the Principal-in-Charge, and Terry Arnold, P.E. and Gary Mass, P. E. provided the <br />Technical Review for this project. <br />i~~~.:~ <br />Michael J. Miller <br />Principal Engineer <br />P.E. No. 29974 <br />1~g74 <br />~ W <br />•' G~ <br />c,,,.. a ~....~~` <br />10 <br />Jerry M. Nettleton <br />Project Manager <br />