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. . � ... <br />Woodward-C <br />3.1.2.2 H drolo ' a H draulic abilities <br />WCC has been engaged in water resources services for many years, particularly in the <br />field of surface water hydroiogy, hydraulics, and water resources management. WCC's <br />staff of hydrologic/hydraulic engineers has solved problems ranging from simple culvert <br />design to the complex hydraulic routing of dam-break fload waves through narrow <br />mountain valleys. The �irm's surface watcr specialties include modeling rainfall-runoff <br />under design precipitation conditions, developing site-speci�c reservoir routing models <br />and incremental damage and flood flow analyses, evaluating watershed attenuation <br />methods and spillway routing alternatives for existing dams, redesigning existing spillways <br />and outlet works ta convey revised inflow design flaods, designing channel sta:bilization, <br />and developing scour and erosion control designs. <br />�ur hydrologic and hydraulic pleted through the use of a full array of <br />state-of-the-art computer progr �, as EC-1 HEC-2, and NWS DAMBREAK. <br />.� <br />3.1.3 S ific Pertiaent e� <br />� <br />As noted previously, Appendixes B and C include information on a wide variety of <br />WCC's dam design and rehabilitation projects. In this section, we would like to highligl�t <br />several of our past projects, which we believe are particularly pertinent to the <br />investigation and design of repairs to Brush Hollow Dam. <br />Woodward-Clyde Consultants was asked to assist in the evaluation of an earth�ill dam <br />in the Midwest which experienced major movement during initial filling. Movements on <br />the order of inches/month were noted thereafter. Perforated PVC pipe piezometers <br />sheazed off within days of instailation. We developed and installed a piezometer system <br />to measure pore pressure in the dam and remotely read and analyzed the daia. This <br />data was used to develop remedial altematives for the dam. In addition, we supervised <br />and logged an exploratory excavation into the slope movement area to investigate the <br />slide plane to assist in evaluation of the failure mode and development of repairs. <br />Woodward-Clyde Consultants <br />23360lPR0.3 12•08-9�(E:33uW1RPf 3'S <br />