LANDSLIDES IN THE PIERRE SHALE IN CENTRAL SOUTH DAKOTA EXECUTIVE SUMMARY REPORT

Landslides in the Pierre Shale in Central South Dakota are controlled by a combination of factors including the flow of water, the stratigraphy of the geologic members, and the degree offracturing in the shale. Landslide size is dependent on both a source of water and a less stable zone at depth. Areas where slides are likely to occur during construction are those with high moisture contents at the present time. Areas where slides may develop after construction are those where construction or natural changes increase the amount of water within the shale. It is possible to locate areas where slides may develop using several different methods: Air photo interpretation and field reconnaissance; electrical resistivity and self potential measurements; seismic refraction measurements; penetration testing and drilling; simple laboratory tests, and the analysis of the results from undrained strength tests. /FHWA/

Media Info

  • Pagination: 28 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00130562
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA-RD-75-S0413 Final Rpt.
  • Contract Numbers: 635(67)
  • Files: NTIS, TRIS, USDOT, STATEDOT
  • Created Date: Mar 29 1976 12:00AM