Emergency Abandonment of 78-Inch CMP at Blue Lakes Trout Farm

This report includes an emergency engineering/construction case history for a failed underground 6.5 ft steel pipe with an ~8,000 gpm flow rate, under 11 ft of head. Emergency measures required quick response to analyze the failed conduit, the water control system, and water diversion, and a continuous effort to stabilize pipe foundations in a soil with high potential for "piping." The seam of the pipe burst under pressure and began to unzip at the radial seam. The pipe foundation and roadway were washing away due to the water spraying and gushing from the failed pipe. This became a major concern for the stability of an adjacent pipe in use. Temporary diversions, relief pipes and 3,000 gpm diesel pumps were installed over several days to convey the water to settling ponds adjacent to the scenic Snake River near Twin Falls, Idaho. Further temporary water control measures were implemented to avoid potential disaster from pump (mechanical) malfunctions. Extra precautions were taken (i.e., light plants, backfill material, back-up pumps, etc.) to mitigate the potential disaster if failure at another pipe seam occurred. Pipe examination and evaluation for the permanent abandonment or removal of the deteriorated 78-inch diameter pipe was essential. Construction efforts to perform these tasks took over two months, while maintaining the flow of water feeding several commercial fish operations and a low head hydro facility.

Language

  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; Photos;
  • Pagination: 11p
  • Monograph Title: Pipeline Engineering and Construction: What's on the Horizon? Proceedings of the Pipelines 2004 International Conference, August 1-4, 2004, San Diego, California

Subject/Index Terms

Filing Info

  • Accession Number: 01003232
  • Record Type: Publication
  • ISBN: 0784407452
  • Files: TRIS
  • Created Date: Aug 19 2005 8:40AM