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<br />r~ <br /> <br />Woodward-CIA.' <br /> <br />.' <br /> <br />3.1.2.2 Hydroloeical/Hydraulic Capabilities <br /> <br />WCC has been engaged in water resources services for many years, particularly in the <br />field of surface water hydrology, hydraulics, and water resources management. WCe's <br />staff of hydrologic/hydraulic engineers has solved problems ranging from simple culvert <br />design to the complex hydraulic routing of dam-break flood waves through narrow <br />mountain valleys, The firm's surface water specialties include modeling rainfall-runoff <br />under design precipitation conditions, developing site-specific 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 to convey revised inflow design floods, designing channel stabilization, <br />and developing scour and erosion control designs. <br /> <br />Our hydrologic and hydraulic analyses are completed through the use of a full array of <br />state-of-the-art computer programs, such as HEC-l, HEC-2, and NWS DAMBREAK. <br /> <br />3.1.3 Specific Pertinent Experience <br /> <br />As noted previously, Appendixes B and C include information on a wide variety of <br />WCe's dam design and rehabilitation projects. In this section, we would like to highlight <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 /> <br />Woodward-Clyde Consultants was asked to assist in the evaluation of an earthfill 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 />sheared off within days of installation. We developed and installed a piezometer system <br />to measure pore pressure in the dam and remotely read and analyzed the data. This <br />data was used to develop remedial alternatives 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 /> <br />Woodward-Clyde Consultants <br /> <br />23360/PRO.3 12-08-93(8:S3am)/RPT <br /> <br />3-5 <br />