Jeff Wimer

Jeff Wimer

Oregon State University


Jeff Wimer currently works as a senior instructor at Oregon State University where he manages the Student Logging Program. Prior to OSU he worked for his families logging and trucking company based out of Albany, OR. Wimer Logging Co. ran 4 tower sides and had 48 trucks. Jeff serves as chairman of the Western Regional Council on Forest Engineering, is President of the Oregon Logging Conference and Vice President of the Pacific Logging Congress.

Jeff has been active in logging safety since the beginning of his career and since 1997 he has been involved with rewriting the OR OSHA Forest Activities logging code. Since 2003 he has been performed just over 24 logging fatality investigations. Jeff has written three books on logging safety. Recently he has been involved with the WA Logger Safety Initiative performing third party audits.

Presentation Topic

Tethered Assisted Harvesting

Presentation Description

Tethered Assisted harvesting has been utilized in Europe for close to two decades. It offers several key advantages to non-tethered harvesting. These systems are recently being introduced to the PNW. Some key limitations to non-tethered include: slope limitations, soil disturbance and safety.

Currently harvesters can navigate slopes up to 70% untethered, but are limited to a downhill operation in such steep terrain. With the utilization of tethered systems these machines have been able to operate on slopes up to 100%.

With tethered systems wheel slip is greatly reduced to almost zero in almost all applications. Newer harvesters utilize an 8-wheel drive system that greatly reduces soil pressure by distributing the overall load. In most dry applications the drive chains can also be removed from the drive system further reducing soil impacts.

The timber industry continues to have the highest fatality rate of all major industries. Within the logging sector a man operating a machine is 10 times safer than working on the ground. Utilization of tethering systems will allow these machines to cover a much larger operational area and reduce the need for men on the ground.

Workshop Schedule

Registration Opens

10:00 AM

Light Lunch

11:00 AM

Key Note Speaker

12:00 PM

Panel: The Economics of Forest Restoration

Topics: Making Forest Restoration Economical, Contractor Logging Costs & Opportunities for Cost-savings, The Economics of Dry Forest Stewardship Projects, and Using the Land Fin Tool

Panel: From Inception to Implementation, Planning for Success

Topics: Planning at the Landscape Scale, Making Use of Good Neighbor Authority, Authorities to Maximize Restoration, and Packaging Federal Resources for All-lands Restoration

Panel: Cutting Edge Technologies for Sale Layout and Implementation (Part 1)

Topics: Virtual Boundaries and Discernable Boundaries, Integration of Unmanned Aerial Vehicles in daily forest operations: from cruising to regeneration survey, Using Avenza PDF Maps in Concert with Cut-To-Length Harvesting Systems, and Planning Ground-based Harvest Operations to Limit Soil Impacts

Reception and Featured Speaker

5:30 PM


7:00 AM

Featured Speaker

Panel: Forest Treatments for Riparian Health

Topics: Hydrology Concerns for Treatments in Riparian Areas, Riparian Thinning Using Cut-to-Length, and Riparian Thinning: An Example from the Deschutes National Forest

Panel: Managing Good Fire at the Right Place and Right Time (Part 1)

Topics: Managed Fire: A tool or a Hazard? An in-depth discussion with the Lakeview Forest Stewardship Group.

Panel: Managing Good Fire at the Right Place and Right Time (Part 2)

Topics: Prescribed Fire at Scale and Contracting Prescribed Fire

Panel: Bridges and Water Crossings: Challenges and Opportunities

Topics: Roads, Crossings and Culverts, Low-cost approaches to Low-Volume Roads and Water Crossings, Prioritizing Roads, Crossings & Culverts with NetMap.

Lunch: A View from All Sides: Perspectives on Implementation Efficiencies, Challenges, & Opportunities

Summary Statements from Forest Service Staff, Collaborative Member and Industry Representative discussed over Lunch

11:45 AM


Have a safe trip home!

1:00 PM


7:00 AM

Featured Speaker: Do Collaboratives Matter in Litigation?

with Susan Jane Brown

Panel: New Opportunities for Conventional Harvesting Systems and Biomass Utilization

Topics: Cut-to-Length vs Whole Tree Logging Systems, Biomass Utilization: Harvesting and Markets, and Managing Slash: Needs, Challenges, Opportunities

Panel: Steep Terrain Harvesting Systems

Topics: Skyline Logging: New Approaches to Traditional Systems, Steep Slope Logging, and Tethered Assist


with optional practical application activity

12:30 PM

Facilitated Conversations on the morning’s topics

Continue the discussion: The key elements of making forest restoration work economically viable

Panel: A Grounded Approach: Soil Considerations for Harvesting

Topics: Soil Matters: Improving Forest Landscape Planning and Management for Diverse Objectives with Soils Information and Expertise, Soil Resources Management for Logging in Steep Slopes, Interaction of Steep Slope Equipment with Soil Resources

Panel: Cutting Edge Technologies for Sale Layout and Implementation (Part 2)

Topics: Tablet applications for Implementing Silvicultural Prescriptions, Forest Restoration in the Tablet & Smart Phone era: Marking and Realtime Monitoring using the ICO APP, and Non-contact tree measurement for forest harvesting machines

Panel: Designation Methods: Lessons Learned

Topics: Alternative Contracting Methods and Implementation Strategies for Commercial Harvest, DxP and DxD

Facilitated Conversation on Afternoon Topics

or optional practical application activity

Dinner on your own

Enjoy one of the many area dining options at your leisure.

6:00 PM
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