High Bridge Area Roadway Slide, Letchworth State Park, Portageville, New York

The Portageville entrance road to Letchworth State Park had experienced subsidence for many years requiring numerous pavement repairs. By 2007 the slope conditions had deteriorated to the point where it was difficult to maintain traffic on the road. Vehicles rounding the curve beneath the bridge were encountering a pavement dip that was nearly 3 feet in depth. Approximately 150 feet of the road was severely cracked and showed signs of significant movement. In response to the deteriorating slope and road conditions the OPRHP commissioned an engineering study to determine the cause of the subsidence and to formulate a plan to remediate slope movements. This paper describes the subsurface explorations conducted to evaluate the conditions and the subsequent design and construction to remediate the area.


  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; Maps; Photos;
  • Pagination: pp 22-34
  • Monograph Title: Proceedings of the 60th Highway Geology Symposium

Subject/Index Terms

Filing Info

  • Accession Number: 01142307
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 20 2009 4:36PM