RE-VEGETATING SILT CUTBANKS FOR EROSION CONTROL

Field experiments were conducted at various locations in the State of Alaska, South Central Region of the Department of Transportation in order to evaluate the adaptability of plant species, methods, materials and equipment for establishing a grass cover on silted back slope soils. The field experiments consisted of replicated tests of fertilizer rates, seeding rates, species adaptation, asphalt emulsion, and mulches. The tests included the major erodible glacier silted soils that are encountered in the interior of Alaska. All of the test sites' soils were laboratory tested before any work was commenced. The PH test varied from 6.4 to 8.2. None of the test sites' silts were acid. The tests showed the importance of refertilization and the use of mulch materials. Wood excelsior mulch plus asphalt emulsion proved to be the most effective mulch for fast sod formation by providing the best combination micro environment, and at the same time, slope protection from erosion. /Author/

• Supplemental Notes:
  • Prepared in cooperation with: DOT and FHWA; Alyeska Pipeline Service Company; University of Alaska Institute of Social Science; and the Department of Agriculture.
• Corporate Authors:

  Alaska Department of Transportation and Public Facilities

  South Central Region, P.O. Box 507
  Valdez, AK  United States  99686
• Authors:
  • Londagin, H E
  • Harding, F H
• Publication Date: 1977-8

Media Info

• Features: Appendices; Tables;
• Pagination: 49 p.

Subject/Index Terms

• TRT Terms: Backslopes; Embankments; Emulsified asphalt; Erosion control; Fertilizers; Glacial soils; Grasses; Mulches; pH value; Planting; Plants; Silts; Slopes
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00172142
• Record Type: Publication
• Source Agency: Federal Highway Administration
• Report/Paper Numbers: FHWA-AK-77-2 Final Rpt., Res Proj. N-121100
• Contract Numbers: AK 77-8
• Files: TRIS, USDOT, STATEDOT
• Created Date: Mar 29 1978 12:00AM