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00193<3 ( . D-8311 PRJ-13.00 To: MEMORANDUM~ 1M E?/<J!z.oos- Perry J. Hensley, Chief I'P' Geotechnical Services Division, Technical Service Center Through: Robert L. Dewey Manager, Geotechnical Engineerin ~t:V From: John M. Cyganiewicz Team Leader, Ridges Basin Subject: Accountability Report to the Consultant Review Board (CRE) Report, CRB Meeting No.6 - Ridges Basin Dam - Animas-LaPlata Project, Colorado . Introduction The sixth Consultant Review Board (CRE) meeting for the design of Ridges Basin Dam was held on May 16-20,2005. Five previous meetings of the CRB were held in past years. The CRB prepared a report of their findings from the sixth meeting dated June 3, 2005, and a copy is included here in Appendix A. This accountability report addresses comments and recommendations in that report. As part of the task order for the meeting, Reclamation had requested responses to a series of questions of specific interest. The CRE elected to include responses to each of Reclamation's questions followed by comments of a general nature. This accountability report follows the structure of the CRB report. The CRE report contained many excellent comments and recommendations. However, only those comments and recommendations that require a response have been extracted from the CRE report and are included below with Reclamation's accountability to each. Reclamation greatly appreciates all of the CRB recommendations. CRB Recommendations CRB Recommendation No.1: 'The CRE is of the opinion that both zones 4 and 4B (with plus 7-inch cobbles excluded) placed . against zones 1,2, 2A and 3 will result in a satisfactory contact. Placement techniques should be