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Author Morfitt, B.; Brewer, W.; Frobel, R. openurl 
  Title (up) Cleaning up the Summitville Mine Superfund Site Type Journal Article
  Year 1998 Publication Geotechnical Fabrics Report Abbreviated Journal  
  Volume 16 Issue 5 Pages 38-41  
  Keywords Geomembran Verbundstoff Abdichten Erdaufschüttung Erosion Schutz Bentonit Bergwerk Netz  
  Abstract A multi-layered geosynthetic system that includes geosynthetic-clay liners (GCL) and a geonet-composite drain (GNGC) is being used to cap and stabilize a 178000 m(exp 2) heap-leach pad at the Summitville Mine Superfund Site in Colorado. Selected were materials on the basis of design requirements for permeability, strength, extreme site conditions and cost. The Summitville cleanup called for a heap-leach pad cap to provide a barrier that would prevent precipitation from infiltrating the pad material. This long-term remediation prevents the pile from becoming saturated and allowing water to overflow the downslope dike, which could cause instability to dike and pond. Three geosynthetic alternatives were proposed. The contractor, that was awarded the heap leach pad, phase 2 contract, decided for a geosynthetic clay liner cap placed directly on the redesigned slopes. Bentofix NW-8 was used as GCL and TexNet TN was selected as the geocomposite drain. Conformance testing, subgrade preparation review, geosynthetic installation/repair inspection and review of cover material placement, performed by independent construction-quality assurance, showed that GCL is a well-suited cap material for heap leach pads, where high wind, cold temperatures rain and high altitude hinder construction. The robust geosynthetic allowed on-site coarse material to be used in the subgrade and cover layer, which saved the cost of importing more expensive bedding material.  
  Address US Bureau of Reclamation, Denver, US; Advanced Terra Testing, Lakewood, US; R K Frobel & Associates, Lakewood, US  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0882-4983 ISBN Medium  
  Area Expedition Conference  
  Notes Cleaning up the Summitville Mine Superfund Site; 16974, BERG , 16.09.98; Words: 376; T9808 0249 178; 4 Seiten, 4 Bilder, 1 Tabelle 3TMP *intelligente Textilien, technische Textilien*; BERG, Copyright FIZ Technik e.V.; EN Englisch Approved no  
  Call Number CBU @ c.wolke @ 17599 Serial 294  
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