SUMMARY OF WORKSHOP SESSION ON MISCELLANEOUS DRAINAGE CONSIDERATIONS--PORTLAND, OREGON

This paper summarizes the work session on miscellaneous drainage considerations held at the 1973 Federal Highway Administration workshop on Water in Pavements in Portland, Oregon. All states had similar geometric requirements and specifications on slopes and grades. There was considerable discussion on frost affects on pavements. Washington uses a 10-in. (25.4-cm) slotted pipe on the upper side of a section of superelevated curve to carry away snowmelt water. The state has established frost depths for their geographic areas, and each project is handled on an individual basis. Alaska uses moss, brush, and other natural materials, in addition to manufactured insulation products, to prevent thawing of their subgrades. Oregon designs to half-of-the-frost-depth with free-draining materials in their frost areas. All states agreed that it is virtually impossible to prevent water from entering the pavement section and that more effort should be put into designing, constructing, and maintaining better drainage facilities.

  • Supplemental Notes:
    • This paper was presented at a 1973 workshop on Water in Pavements sponsored by the Federal Highway Administration, held in Portland, Oregon.
  • Corporate Authors:

    Federal Highway Administration

    Office of Research, Development, Engineering and Highway Operations, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Gregg, C J
  • Conference:
  • Publication Date: 1973

Language

  • English

Media Info

  • Pagination: p. 335-336

Subject/Index Terms

Filing Info

  • Accession Number: 00792284
  • Record Type: Publication
  • Files: TRIS, USDOT
  • Created Date: May 7 2000 12:00AM