Sessions, John

University Distinguished Professor
Strachan Chair of Forest Operations Management

Office Location: 
Peavy 223
Email Address: 

Registered Professional Civil Engineer: Washington

Ph.D., Forest Management, 1979 Oregon State University
M.S., Forest Engineering, 1971 University of Washington
M.S., Civil Engineering, 1968 California State University
B.S., Civil Engineering, 1966 University of California, Los Angeles

Current Programs: 

Developing techniques for transportation planning, tactical forest planning, strategic forest planning, decision support systems for road management, strategic planning on State forests, biomass collection and transport.

Graduate Students: Francisca Belart (PhD), Michael Berry (PhD), Joshua Petitmermet (MS), Bryent Daugherty(MS)


    FE/FOR 456: International Forestry (team taught)
    FE 470/570: Logging Mechanics
    FE 552: Forest Transportation
    FE 640: Combinatorial Optimization in Forest Planning
    FE/FOR 457/557: Techniques for Forest Resource Analysis

During Academic Year 2015-2016:

Summer and Fall Term 2015 – Projects

  •     Biomass Production and Transport Planning
  •     Logging Vehicle Performance

Winter Term 2016
    FE 470/570: Logging Mechanics
    FE 640-001: Combinatorial Optimization
    FE/FOR 457/557: Techniques for Forest Resource Analysis

Spring Term 2016   
    FE/FOR 456: International Forestry
    FE 552: Transportation Planning

Recent Publications: 

Zamora, R. and J. Sessions. 2015. Modeling harvest forest residue collection for bioenergy production. In review. Croation J. of For. Engr.

Leshchinsky, B. J. Sessions, and J. Wimer. 2015. Analytical design charts for mobile anchor systems. In press. Int. J. of For. Engr. On line April 8, 2015. DOI: 10.1080/14942119.2015.1023014

Temesgen H., K. Poudel, A. Gray, D. Affleck, and J. Sessions. 2015. Challenges and Opportunities in Estimating Above Ground Forest Biomass. Scandinavian J. of For. Res. Online Jan 27, 2015, doi:10.1080/02827581.2015.1012114.

Leshchinsky. B. J. Sessions, J. Wimer and M. Clausen. 2015. Designing Mobile Anchors to Yield: A Tension Relief System for Tail Anchoring. Submitted to Croation J. of Forest Engineering.

Zhu, J.Y., M. Chandra, F. Gu, R. Gleisner, R. Reiner, J. Sessions, G; Marrs, J. Gao, and D. Anderson. 2015. Using sulfite chemistry for robust bioconversion of Douglas-fir forest residue to bioethanol at high titer and lignosulfonate: A pilot-scale evaluation. Bioresource Technology 179(2015):390-397.

Zamora, R., J. Sessions, D. Smith and G. Marrs. 2015. Effect of grinder configuration on forest biomass bulk density, particle size distribution and fuel consumption. Biomass and Bioenergy (81):44-54.

Lauer, C., J. McCaulou, J. Sessions, and S. Capalbo. 2015. Biomass Supply Curves for Western Juniper in Central Oregon, USA, Under Alternative Business Model and Policy Assumptions. In press. J. Forest Policy and Economics.

Simwanda, M., J. Sessions, K. Boston, and M. Wing. 2015. Modeling biomass transport on single lane forest roads. Forest Science (61):763-773.

Zamora, R. and J. Sessions. 2015. Economics and logistics of double trailers in transporting forest biomass on steep terrain. In press. California Agriculture Journal

Marrs, G., R. Zamora and J. Sessions. 2015. Optimizing the Feedstock Value Chain for Bio-Jet Fuel from Pacific Northwest Softwood Harvest Residues. Submitted to J. of Renewable Energy.

Beck, S., M. Olsen, J. Sessions, and M. Wing. 2014. Automated extraction of forest road network and geometry from aerial LiDAR. Accepted. European J. of Forest Engineering.

Ghaffariyan, M. R., J. Sessions, and M. Brown. 2014. Collecting harvest residues in pine plantations using a mobile chipper in Victoria (Australia). Silva Balcanica 15(2):81-95.

Zamora-Cristales, R., J. Sessions, K. Boston and G. Murphy 2014. Economic Optimization of Forest Biomass Processing and Transport. Forest Science. http://dx.doi.org/10.5849/forsci.13-158.

Clark, J., J. Sessions, and R. Zamora. 2014. Optimizing Knife Change Times for Forest Biomass Chipping Operations. In review. Forest Products J.

Zamora, R., J. Sessions, D. Smith, and G. Marrs. 2014. Effect of high speed blowing on the bulk density of ground residues. Forest Prod. J. 64(7/8):290-299.

Wing, M. G., J. Burnett, and J. Sessions. 2014. Remote sensing and unmanned aerial system technology for monitoring and quantifying forest fire impacts. Int. Journal of Remote Sensing Applications 4(1):18-35.

Zamora, R., P. Adams, and J. Sessions. 2014. Ground-based thinning on steep slopes in Western Oregon: Soil exposure and strength effects. Forest Science 60(5):1014-1020. Available online February 6, 2014. http://dx.doi.org/10.5849/forsci.12-525.

Akay, A., M. G. Wing, and J. Sessions. 2014. Estimating sediment reduction cost for low-volume forest roads using a LiDAR-Derived High-Resolution DEM. Baltic J. of Road and Bridge Engineering 9(1):52-57.

Wing, M.G., J. Burnett, S. Johnson, A. Akay and J. Sessions. 2014. A low-cost unmanned aerial system for remote sensing of forested landscapes. International Journal of Remote Sensing Applications 4(3):113-120. DOI: 10.14355/ijrsa.2014.0403.01

Lyons, K., J. Sessions, and J. Wimer. 2014. The adequacy of falling object protection design criteria for feller bunchers. Forest Science 60(4):757-763. Published online October 2013 (http://dx.doi.org/10.5849/forsci.12-110).

Recent Theses

Pavez, Ric. 2014.  An Optimization Model to Allocate Forestry Incentives Funds in Teak Plantations of the Southern-Coastal Region of Guatemala.  MS. Oregon State University. 189 pp.

Beck, Storm.  2014.  The Use Of LiDAR To Identify Forest Transportation Networks. MS. Oregon State University, 110 pp.

Zamora, Rene. 2013. Economic Optimization of Forest Biomass Processing and Treatment. PhD. Oregon State University, 196 pp.

Stander, Henk. 2011. Uncertainty, Risk Management on the Tillamook State Forest: A Case Study. PhD. Oregon State University, 346 pp.

Kokenge, Kyler. 2011. Opportunities and Challenges for Decision Support Systems in Log Truck Scheduling and Dispatching. MS. Oregon State University, 147 pp.

Schmidt, Christian. 2011. Spaitally-Explicit Prediction of Recoverable Harvesting Residues. MS. Oregon State University, 179 pp.

Simwanda, Matamyo. 2011. Modeling Biomass Transport on Single Lane Forest Roads and Monitoring GPS Accuracy for Vehicle Tracking Under Different Canopy Conditions. MS. Oregon State University, 153 pp.

Thompson, Matthew P. 2008. Contemporary Forest Road Management with Economic and Environmment Objectives. PhD. Oregon State University, 302 pp.