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  • Streambed scour and redeposition behavior in streambed simulated culverts over an annual period

    Creator:
    Stewart, Anna
    Abstract:
    The objective of this study was to provide first order observations of bed level changes occurring in streambed simulated culverts throughout an annual period. To accomplish this, 30 culvert sites were selected in Oregon and Washington, and monitored over, at least, a 2 year period. Streambed scour and redeposition data...
    Resource Type:
    Honors College Thesis
    Full Text:
    : _____________________________________________________________________ Marvin Pyles The objective of this study was to provide first order observations of bed

  • Simplified stability assessment for low volume road cut and fill slopes

    Creator:
    Pratt, Randy C.
    Abstract:
    Many miles of roads are built in the Pacific Northwest Forests to provide access for logging and fire protection. Logging roads often cross steep mountainous terrain. Logging roads and the associated cut and fill slopes represent a discontinuity in the natural stress state in the soil mantle. These conditions result...
    Resource Type:
    Masters Thesis
    Full Text:
    Road Cut and Fill Slopes Abstract approved: Redacted for Privacy Dr. Marvin Pyles /1 Many miles of

  • Behavior and load carrying capacity of stump anchors

    Creator:
    Stoupa, Joan
    Abstract:
    Research was conducted to study the behavior and load carrying capacity of stump anchors. A field testing program was undertaken to determine the response and strength characteristics of second growth Douglas-fir (Pseudotsuga menziesii) stumps ranging in diameter from 6 to 17 inches. Horizontal and vertical stump movements due to an...
    Resource Type:
    Masters Thesis
    Full Text:
    appreciation to my advisor, Dr. Marvin Pyles, for his guidance, patience, and encouragement throughout this

  • Hydraulic performance of countersunk culverts in Oregon

    Creator:
    White, Dale (Dale Jeffery), 1963-
    Abstract:
    Twenty eight countersunk culverts in Oregon were evaluated to assess current conditions and hydraulic performance. The culverts were also assessed with respect to their stability, particularly when subjected to high flows. In general, the culverts were found to be resistant to erosion and effective at conveying large discharges. Based on...
    Resource Type:
    Masters Thesis

  • An economic evaluation of logging road maintenance

    Creator:
    Feeney, Daniel John
    Abstract:
    This thesis describes the results of a project conducted to determine the economics of forest road maintenance alternatives between periods of timber harvesting. An open road and a closed road alternative will be compared to the economics of clearcutting an entire area and obliterating the road system until reentry at...
    Resource Type:
    Masters Thesis