Thiel, R. and Criley, K. (2003) “Hydraulic Conductivity of a GCL Under Various High Effective Confining Stresses for Three Different Leachates.”  Geosynthetics International, Vol. _, No. _, pp. _-_.  (Draft manuscript under review for tentative publication.)

Thiel, R. and Maubeuge, Kent von. (2002) “Current Industry Performance and Construction Issues Related to GCLs”  Proceedings of the 16^th GRI Conference on Hot Topics in Geosynthetics II.  Geosynthetic Institute, Folsom, PA, December 16-17, pp. 227-241.

Richardson, G.N., Thiel, R., and Erickson, R.B. (2002) “GCL Design Guidance Series Part II: GCL Design for Slope Stability.” Geotechnical Fabrics Report, IFAI, Roseville, MN, September, 2002.

Thiel, R., Erickson, R.B. and Richardson, G.N. (2002) “GCL Design Guidance Series Part II: GCL Design for Slope Stability.” Geotechnical Fabrics Report, IFAI, Roseville, MN, August 2002.

Erickson, R.B., Thiel, R., and Richardson, G.N. (2002) “GCL Design Guidance Series Part I: GCL Performance as a Fluid Barrier.” Geotechnical Fabrics Report, IFAI, Roseville, MN, June/July 2002.

Giroud, J.P., Thiel, R.S., Kavazanjian, E., and Lauro, F.J. (2002) “Hydrated Area of a Bentonite Layer Encapsulated Between Two Geomembranes.” Proceedings for the Seventh International Conference on Geosynthetics, Nice, France, Sept 2002.

Erickson, R. and Thiel, R. (2002) “Design and Application of the Geomembrane Supported GCL as a One-Product Composite Liner.” Presented at the Nuremburg GCL Conference, Feb 2002.

Thiel, R.S. (2001) “Peak vs. Residual Shear Strength for Landfill Bottom Liner Stability Analyses.”  Proceedings of the 15^th Annual GRI Conference Hot Topics in Geosynthetics – II, presented in Houston, TX, Dec. 13, 2001, Geosynthetics Institute, Folsom, PA, pp. 40-70.

Thiel, R.S. and Erickson, R.  (2001) “GCL Alternative Liner and Critical Slope Stability – Unique Case History Involving Encapsulated Design Approach.” Proceedings for Sardinia ’01 Eighth International Landfill Symposium, Oct. 2001.

Thiel, R.S., Daniel, D.E., Erickson, R., Kavazanjian, E., and Giroud, J.P.  (2001)  GundSeal Design Manual.  Available from GSE, Houston, TX.  September 2001.

Thiel, R.S. (2001) “Unique Inflated Pond Cover Using Reinforced Flexible Polypropylene.” Proceedings to Geosynthetics 2001, IFAI, Roseville, MN.  Conference held in Portland, OR in February 2001, pp. 337-348.

Richardson, G.N and Thiel, R.S. (2001) “Interface Shear Strength: Part 1 – Geomembrane Considerations.”  Geotechnical Fabrics Report, Vol. 19, No. 5, pp. 14-19.  IFAI, Roseville, MN, June/July 2001.  (Part 2 published in August 2001).

Hanson, J.L., Gilbert, R.B., Wright, S.W., and Thiel, R.S. (2001) “Unsaturated Interface Shear Strength Properties for Nonwoven Geotxtiles.” Proceedings to Geosynthetics 2001, IFAI, Roseville, MN.  Conference held in Portland, OR in February 2001, pp. 135-148.

Thiel, R. and Wall, R. (2000) “Case History: Cost Effective Low-Maintenance Final Cover of Steep Slopes.” Geotechnical Fabrics Report (GFR) published by the Industrial Fabrics Association International (IFAI), Roseville, MN, April, 2000.

Thiel, R. (1999) “Design and Testing of a NWNP Geotextile Gas Pressure Relief Layer Below a Geomembrane Cover to Improve Slope Stability.” Proceedings for Sardinia ’99 Seventh International Landfill Symposium, Vol. III, pp. 343-350, Oct. 1999.

York, R., Thiel, R., and Beaudry, E. (1999) “Full Scale Experience of Direct Osmosis Concentration Applied to Leachate Management.” Proceedings for Sardinia ’99 Seventh International Landfill Symposium held in Oct. 1999.

Richardson, G.N., Thiel, R.S., and Marr, W.A. “Lessons Learned From the Failure of a GCL/Geomembrane Barrier on a Side Slope Landfill Cover.”  To be published in Dr. J. P. Giroud’s upcoming book tentatively entitled Lessons Learned from Failures Associated with Geosynthetics.

Thiel, R.S.  (1999) “Design of Gas Pressure Relief Layer Below a Geomembrane Cover to Improve Slope Stability.” Proceedings to Geosynthetics '99 conference held in Boston, MA in April 1999, pp. 235-252.  Paper received the Grand Award for the best paper.

Brown, D., Thiel, R., Brummer, C., and Huvane, S. (1999) “Innovative Design and Construction of Landfill Side-Slope Liners in High Seismic Risk Areas, A Case Study.” Proceedings to Geosynthetics '99  conference held in Boston, MA in April 1999, pp. 589-600.

Thiel, R. (1998) “Design Methodology for a Gas Pressure Relief Layer Below a Geomembrane Landfill Cover to Improve Slope Stability.”  Geosynthetics International, Vol. 5, No. 6, pp. 589-616.

Richardson, G.N., Thiel, R., and Mackey, R. (1998) “Designing with Needle-Punched Reinforced GCLs: Stability Fundamentals.” Geotechnical Fabrics Report, IFAI, Roseville, MN, Oct/Nov 1998.

Peggs, I.D. and Thiel, R.S. (1998) “Selecting a Geomembrane Material.” Proceedings for the Sixth International Conference on Geosynthetics held in Atlanta, GA, March 1998, pp. 381-388.

Liu, C.N., Gilbert, R.B., Thiel, R.S., and Wright, S.G. (1997) “What is an Appropriate Factor of Safety for Landfill Cover Slopes?” Proceedings for Geosynthetics '97 held in Long Beach, CA in March 1997.  Sponsored by IFAI, Roseville, MN, pp. 481-496.

Chaney, R.C., Thiel, R., Richardson, G.N., and Cadwallader, M. (1997) “Cyclic Response of Clay-Geomembrane Interfaces and Their Impact on the Seismic Response of Lined Landfills.” Proceedings for Geosynthetics '97 held in Long Beach, CA in March 1997.  Sponsored by IFAI, Roseville, MN, pp. 977-988.

Thiel, R.S.; Isham, J.C.; and Girard, K. (1996) " Wood Waste to Wine: A Unique Landfill Closure." Proceedings of the 1996 TAPPI International Environmental Conference held May 5-8, 1996, Orlando, FL.

Thiel, R.S.; Wiese, J.; and Haynes, C. (1995) "Siting, Permitting, Design, and Construction of a Major Forest Products Landfill Facility."  Proceedings for the 1995 TAPPI International Environmental Conference held May 7-10, Atlanta, GA, 1995.

Thiel, R.S. and Koerner, R.M. (1994) "Landfill Liner Design."  Presentation to regulators and landfill owners in Oregon and Washington, held in Seattle on July 28, 1994.

Thiel, R.S. and Stewart, M.G. (1993) "Geosynthetic Landfill Cover Design Methodology and Construction Experience in the Pacific Northwest."  Proceedings for Geosynthetics '93 held in Vancouver, B.C. in April 1993, pp. 1131-1134.  Sponsored by IFAI.  Paper received award for best environmental paper.

Thiel, R.S. (1993) "Designer's Perspective Using Coextruded Polyethylene Geomembrane Technology."  Proceedings of the Sixteenth International Madison Waste Conference.  September 22-23, 1993.  University of Wisconsin, Madison.

Thiel, R.S. (1993)  "Modern Landfill Liner and Cover Design and Construction."  Talk presented to the Oregon ASCE Geotechnical Group on November 3, 1993.

Thiel, R.S. and Cadwallader, M. (1993)  "Innovative Applications of Coextruded Geomembranes."  Presented at the 7th GRI Seminar "Geosynthetic Liner Systems:  Innovation, Concerns, and Designs."  December 14-15, 1993 at Drexel University.

Thiel, R.S. and Stewart, M.G. (1992) "Field Construction Quality Assurance of Geotextile Installations."  Proceedings of the 6th GRI Seminar "QC/QA and CQC/CQA of Geosynthetics."  Presented December 12, 1992 at Drexel University. 

Thiel, R.S. (1992) "Tipping Rate Analysis:  Cost and Development Considerations for Solid Waste Landfills."  Proceedings of the ASTSWMO 1992 National Solid Waste Forum in Portland, OR.  July 20-22, 1992.

Thiel, R.S. (1992) "Landfill Development Considerations."  Oregon State University graduate class presentation for a Solid and Hazardous Waste Management class.  Contact:  Anna Harding, Ph.D., Assistant Professor.  (541) 737-2686.