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Filtering by: Subject Logging, Skyline -- Costs -- Case studies Remove constraint Subject: Logging, Skyline -- Costs -- Case studies

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Operational prebunching: a logger's application to reduce skyline thinning costs

Creator:

Zielinsky, Cary Russell

Abstract:

In the Pacific Northwest, loggers are faced with the problems of changing from logging old growth to second growth. This is due to the shrinking old growth timber supply and increased entry into the· second growth stands. Beuter (1 980) indicated that in western Oregon 70.2 percent by volume of...

Resource Type:

Capstone Project
Cable thinning in young forests with average DBH of 5-8 inches : a case study

Creator:

Gabrielli, Robert Michael

Abstract:

This paper describes the results of a time-study conducted near Grand Ronde, Oregon, to determine the production rates and total harvesting costs of a cable thinning in a young stand. The stand had a species mix of 48 percent western hemlock (Tsuga. heterophylla- (Raf.) Sarg.), 45 percent Douglas-fir (Pseudotsuga meuziesil...

Resource Type:

Capstone Project
A comparison of productivity for whole tree, tree length, and log length skyline thinning in 35 year old Douglas-fir stands of western Oregon

Creator:

Putnam, Nathan E.

Abstract:

Whole tree and tree length thinning are two alternatives which are likely to be more productive and may prove to be more cost effective than conventional log length thinning. The purpose of this study was to evaluate and compare log length, tree length, and whole tree thinning techniques in terms...

Resource Type:

Capstone Project
The Limber Jim case study : production and economics of a skyline system in a thinning/fuels reduction setting of a mixed conifer stand in the Blue Mountains of northeastern Oregon

Creator:

Doyal, James A.

Abstract:

Forest managers in the Blue Mountains, of northeastern Oregon are currently faced with vast areas of forests with health problems and high fuel loadings. These conditions resulted from a combination of insect infestations, past management practices and the elimination of fire from the local ecosystems. These forests are now overstocked,...

Resource Type:

Capstone Project
The effects of swinging and sorting with a skidder on yarding and loading efficiency in small diameter Douglas-fir

Creator:

McIntire, John Charles

Abstract:

This study evaluated the impact of using a rubber-tired skidder to keep the landing clear by sorting and decking the logs along the road prior to loading by a self-loading truck. The evaluation was accomplished through detailed time studies conducted on a Koller K-300 yarder, a Crown Super 3000 self-loader,...

Resource Type:

Capstone Project
A case study of prebunching and swinging : a thinning system for young forests

Creator:

Kellogg, Loren D.

Abstract:

Commercial thinning young growth forests is an increasingly important silvicultural technique for improving second growth management of Douglas-fir stands. Research aimed at advancing the efficiency of skyline logging operations in small wood timber stands is essential in order to make thinning these young stands economical. The purpose of this study...

Resource Type:

Capstone Project
An analysis of road changing on several cable logging operations

Creator:

Van Winkle, Denis James

Abstract:

Road changing i.s the activity of moving operating lines on a cable yarding operation to permit access to logs in an unyarded portion of a logging unit. The time required to perform this activity varies widely and may consume a significant portion of the total yarding time. With rising costs...

Resource Type:

Capstone Project
Load bearing capacity of alder, spruce and hemlock tail trees

Creator:

Pugh, Edwin V.

Abstract:

This paper presents an evaluation of the cable loading support capacity of red alder, Alnus rubra Bong., Sitka spruce, Picea sitchensis (Bong.) Carr, and western hemlock, Tsuga heterophylla (Raf.) Sarg., tail trees. Capacity is measured in terms of combined stress resulting from compression and bending, rather than the traditional methods...

Resource Type:

Capstone Project
Load-deformation characteristics of multiple stump anchor systems

Creator:

Toupin, Richard C.

Abstract:

This paper documents the development of a model which determines multiple stump anchor system displacement as a response to skyline load for four anchor rigging configurations: 1. Series multiple, 2. Tieback, 3. Elevated tieback, and 4. Equalizer block. It also documents the field testing of four two stump anchors rigged...

Resource Type:

Capstone Project

Limit your search

Academic Affiliation

Forest Engineering8

Advisor

Olsen, Eldon3
Pyles, Marvin R.2
Aulerich, Ed1
Kellogg, Loren D.1

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1976 to 1998

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Committee Member

O'Leary, John2
Adams, Paul1
Froehlich, Hank1
Olsen, Eldon D.1
Sessions, Julian1

Creator

Doyal, James A.1
Gabrielli, Robert Michael1
Kellogg, Loren D.1
Mcintire, John Charles1
Pugh, Edwin V.1
more Creators »

Date

Date range begin – Date range end

Current results range from 1976 to 1997

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Decade

1990-19991
1980-19896
1970-19792

Degree Field

Forest Engineering8
Forestry1

Degree Level

Master's9

Degree Name

Master of Forestry (M.F.)9

Language

English [eng]9

Peer Reviewed

No9

Resource Type

Capstone Project9

Rights Statement

Copyright Not Evaluated9

Subject

Logging, Skyline -- Case studies2
Logging, Skyline -- Oregon -- Cost effectiveness -- Case studies2
Logging, Skyline -- Blue Mountains (Or. and Wash.) -- Cost effectiveness -- Case studies1
Logging, Skyline -- Costs -- Case studies1
Logging, Skyline -- Equipment and supplies -- Cost effectiveness -- Case studies1
more Subjects »

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