Laserfiche WebLink
<br /> <br /> <br /> <br />1 <br /> <br />1 <br /> <br />1 <br /> <br />LJ <br /> <br />1 <br /> <br />Darrel L. Buffington, P.E. Highway and Bridges ICont'd) <br />Heap Leach Design <br />Islets Boulevard, Albuquerque, New Mexico. Performed the geotechnical investigation for 4 miles of <br />urban roadway construction. Project included subgrade investigation, pavement design, and developing <br />recommendations for stabilization of soft clay subgrade. In addition, an environmental assessment was <br />made of five sites for potential environmental degradation of portions of properties to be acquired for <br />right of way. A review of historic site uses was made and groundwater and soil sampling performed. <br />Lomas Boulevard Drainage Construction, Albuquerque, New Mexico. As part of construction of an <br />urban drainage project, a geotechnical investigation was performed for an approximately two mile <br />section. Recommendations were developed for excavation and shoring design and roadway <br />reconstruction. Design of concrete and asphalt pavement was completed. <br />Heap Leach Design: <br />Mr. Buffington's project experience in the investigation and design of cyanide heap leaching facilities <br />include the following projects: <br />Illipah Project, White Pine County, Nevada. Responsible for preliminary geotechnical investigation and <br />siting studies, comparative cost analysis of alternative pad liner systems, detailed geotechnical <br />investigation of pad and solution pond sites, hydrologic and drainage diversion design, and evaluation <br />of pad overliner requirements using agglomerated ore. Developed construction plans and specifications <br />fora 900,000 square foot heap leach pad with solution containment ponds and provided consultation <br />and review during construction. <br />Round Mountain Expansion, Nye County, Nevada. Geotechnical investigation and design development <br />of a reusable 1.04 million square foot asphalt lined pad with geomembrane lined solution ponds. Project <br />included design of asphalt liner to support 85 ton capacity haulage vehicles to be used in handling ore <br />and tailings on the pad. An investigation was made into the use of leached tailings as asphalt <br />aggregate. <br />Borealis Freedom Flats Project, Mineral County. Nevada. Geotechnical investigation, geomembrane <br />liner design and construction consultation fora 460,000 square foot leach pad. Project included <br />performing stability analysis of heap slopes and geomembrane -ore interface, subject to U.S. Forest <br />Service review and approval. Dynamic stability analyses were required as a result of the relatively high <br />seismic risk associated with the site. <br />' White Pine Project, White Pine County, Nevada. Siting studies, geotechnical investigation and <br />development of final design of a 400,000 square foot geomembrane lined heap leach pad. Due to steep <br />site topography, design included the use of a high friction angle, textured HDPE liner system to provide <br />heap stability. <br /> <br /> <br /> <br />Barnes's Canyon Project, Salt Lake County, Utah. Geotechnical investigation and design review for <br />a 1.6 million square foot heap leach operation. Project involvement included assistance in permit <br />document preparation, performing geotechnical investigations of heap leach pad sites and waste rock <br />dumps, providing design development recommendations, and review of construction plans and <br />specifications developed by others. Major project concerns were the occurrence of low strength <br />subsurface strata, high regional seismic risk, and regulatory concerns associated with project location <br />adjacent to major population center. <br />1 <br />