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Hylton Haynes & Rien Visser |
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Graduate Student and Assistant Professor,
Virginia Tech |
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Non-uniform stands: |
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many low value ‘pulp’ trees |
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few large high value trees |
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Mountain logging crews: |
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1 bulldozer, 1 cable skidder, 1 loader and 1
truck |
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‘Family’ logging crews, little formal training |
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Changes being forced by environmental
regulations and improving efficiency |
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Poorer area of the eastern USA |
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Different work ethic, ‘work to
live’ attitude |
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Hard work in Hardwoods |
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Aging workforce
– few young people interested, very little training |
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Example: contractor with 8 workers employed 30
people in one year to keep his operation going |
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455 million tons of saw timber on land (>
than 5 MBF/ac). |
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slope >40% @ 50% availability, 100 year
rotation, 15 000 tons/year |
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Goal: promote cable logging as a viable
harvesting system: |
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FS ‘Stewardship’ project |
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third party harvesting system evaluation |
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‘transparency’ of timber sales, environmental
improvements |
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Operator Training ‘learn-curve’ |
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professional training from PNW |
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establish productivity improvement |
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New project: skidder extraction, swing landing,
cable yarder, excavator with grapple saw |
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New project: maximize value recovery, ‘roadside’
auction of sawlog, stream habitat improvement |
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‘Self taught’ learn-curve effect |
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Pre- and post training: |
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Productivity Study |
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elemental time study (cycle times, turn vol.) |
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On-site System Evaluation |
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observations – operations, safety, environmental |
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Data Analyses |
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Thunderbird TY 45 yarder - July 2001 |
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Skidder and trailer mounted loader |
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Crew had operated yarder ~ 1 month |
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Two experienced PNW cable yarder operators /
riggers |
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Each ~ 5 days on-site crew training |
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Complicated for pre-training data set! |
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Low correlation between productivity and
production variables: |
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i.e. ‘carriage out’ vs distance (r2=0.19 up to 0.69) |
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Carriage out (min) = |
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0.96 + 0.0023 x Distance |
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– 0.52 x Train |
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Improve safety |
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working under skyline, poor felling |
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Landing layout - loader location |
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Trailer mounted loader: system halts when
loading out truck |
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Professional training ~ $500 to 700 / trainer /
day |
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1 week, two PNW trainers ~ $8000 |
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Resulted in ‘1 extra truckload’ / day |
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Payback in just 4 weeks ! |
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Professional training pays |
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Quick return on ‘investment’ |
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increase productivity |
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increase safety and environmental performance |
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Still need to work on management system |
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many ‘social / cultural’ issues to overcome! |
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Acknowledgements |
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Wes Hood Logging |
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Mullican Lumber |
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Hank Sloan, Forest Service |
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Karl Stampfer,
Vienna |
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