This report documents the installation of the Hydraway edge drain (version two) on I-64 in Franklin-Woodford-Scott and Fayette Counties. The edge drain was placed on the back side of the trench against the shoulder and backfilled with a sand/slurry. From observations on this project and several previous projects, the sand/slurry backfill helps to insure the integrity of the drainage system during initial backfilling. It is apparent that the sand slurry backfill provides a better installation in comparison to previous methods using excavated trench material. Notable trench settlement did occur on this project. It is apparent that insufficient water was used to properly densify the sand. From observations on other projects, it appears that approximately one gallon per linear foot is required to achieve proper density. It appears that the method of flushing the sand, the speed of the construction, and the amount of water needed to achieve proper density will vary on the contractors equipment and methods. The net result is to achieve proper density without damaging the edge drain. It also appears that the initial asphalt plug is not being properly compacted. The Hydraway panel was reversed to minimize fabric intrusion into the core of the drain. Fabric intrusion into the inner core of the Hydraway drain appeared to be eliminated when the panel was reversed. When the panel was reversed and trench settlement occurred, the rigid back of the panel was forced to bend in the opposite direction it was designed. The net result was cracking occurring in the rigid backing. Information reported in Research Report KTC-91-10, "Evaluation of Headwalls and Outlets for Geocomposite Edge Drains on I-75 and I-71", indicates that 48% of the flexible outlet pipes that were inspected were less than 60% open. Approximately 10% of the rigid outlets inspected during this study were less than 60% open, thus showing a substantial increase in performance. A large amount of distress noted on I-64 was observed in the flexible 4-in. pigtail. If rigid pipe is used throughout the outlet pipe system, performance should increase.

  • Record URL:
  • Corporate Authors:

    University of Kentucky, Lexington

    Kentucky Transportation Center
    College of Engineering, 176 Raymond Building
    Lexington, KY  United States  40506-0281

    Kentucky Transportation Cabinet

    200 Mero Street
    Frankfort, KY  United States  40622

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Fleckenstein, L J
    • Allen, D L
  • Publication Date: 1991-12


  • English

Media Info

  • Features: Appendices; Figures; References;
  • Pagination: 42 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00626789
  • Record Type: Publication
  • Report/Paper Numbers: KTC-91-19
  • Contract Numbers: FSP 121 SW99 016D
  • Created Date: Feb 10 2002 12:00AM