Monday, February 6

1:30 – 3 pm
Alternative Backfill Materials Applicable to MSE Structures (organized by AMSE)


3:15 – 4:30 pm
Applications of Fabricated Geosynthetics
(organized by FGI)

PVC Geomembranes in Agricultural Uses
Adolpho Meldau and Jucieli Duarte, Cipatex Group Cerquilho

Carbon Footprint Calculator
Timothy D. Stark, Ph.D., P.E., University of Illinois at Urbana-Champaign

Payment Bases in Liner Projects
Duff Simbeck, Simbeck and Associates, Inc.

Performance Comparison of Evapotranspiration and Engineered Turf Covers
Md Jobair Bin Alam, Ph.D., P.E., M. ASCE, Maalvika Aggarwal, Ram Ray, Ph.D., P.E., M. ASCE, ACUE, Prairie View A&M University

Protection of Geofoam using High Strength, Chemically Resistant Geomembranes
William D. Shehane, P.E. and Tina Oliver, Seaman Corporation; Felon R. Wilson, P.E., Consultant

Case Study: Lake Forest Reservoir Relining & Floating Cover
Brian Fraser, MBA, Layfield Canada; Douglas Hilts, P.E., S.E., Hilts Consulting Group; Robert Emmons, Layfield USA


Tuesday, February 7

9:45 – 11:15 am
MSE Structure Case Histories Using Alternative Backfill Materials
(organized by AMSE)

Mechanically stabilized earth (MSE) structures depend on frictional interaction between the reinforcements and the reinforced backfill for their internal stability. Therefore, in addition to the properties of the reinforcements, the physical, mechanical and electrochemical properties of the selected backfill are critical to designing a safe structure which will provide a long service life. Sometimes naturally occurring backfill meeting the specifications is available on the project site, or it can be brought in from an economical haul distance. In other situations, it may be necessary to consider alternative materials as the MSE backfill.

Alternative backfills may be manmade or may be reprocessed/recycled from manmade materials. Examples of such alternative backfills used in MSE structures include low density cellular concrete, foamed glass aggregate, vitrified shale, clay and slate, and recycled concrete. This session will feature presentations on several alternative MSE structure backfills, with discussion of their physical, mechanical and electrochemical properties, as well as illustration of their use through case histories. Audience interaction will be encouraged through Q&A.


1:30 – 3 pm
Panel Discussion: How to Write a Good Geomembrane Spec
(organized by FGI)
Moderator: Timothy Stark, PhD, Univeristy of Illinois at Urbana-Champaign
Panelists: Edward Silva, e Squared Technical Textiles; Ray Peebles, Cooley Group; Neil Nowak; Patrick Elliott, Viaflex

This Panel Discussion will assemble  industry leaders to discuss the importance of writing a good geomembrane specification and not using an old specification that may or may not be for the type of geomembrane intended for the current project. In particular, the panelists will discuss the most important parameters of a geomembrane specification for a particular application, such as, functionality, longevity, and constructability. Some of the important parameters to consider when preparing a specification may include: chemical resistance, ability to accommodate differential settlement, dimensional stability to control wrinkles, ability to factory fabricate large panels to reduce field time and exposure, and seam strengths but properties should be keyed to the application of the geomembrane. For example, if there are concerns about subgrade compaction, specifying a material with higher multiaxial elongation properties may be desirable.  It is also important that engineers understand that most material types can have very different properties and it is important that designers select an appropriate geomembrane to meet project requirements.  This will help avoid confusion or blended specifications. Finally, the importance of specifying relevant and consistent properties, e.g., long-term durability in terms of plasticizer retention instead of OIT values for a PVC geomembrane. Afterwards, the panelists will answer attendees questions about writing a good geomembrane specification.



3:15 – 4:45 pm
Recent Advances in MSE Walls Analysis, Design and Performance

Effect of Spread Footing Loads on Stability of Geosynthetic-Reinforced Retaining Walls
S. Mustapha Rahmaninezhad, Ph.D., A.M.ASCE, University of Texas Rio Grande Valley, Terracon Consulting Inc.; Thang Pham, Ph.D., P.E., A.M.ASCE and Thuy Vu, Ph.D., University of Texas Rio Grande Valley; Ashley Alanis and Alfonso A. Soto, P.E., D.GE., Terracon Consulting Inc.

Migrating From the Simplified Method to the Stiffness Method for Internal Stability Design of MSE Walls
Richard J. Bathurst, Ph.D., Royal Military College of Canada; Tony M. Allen, WSDOT (retired)

New Closed-Form Analytical Solutions for Total Reinforcement Force in a GRS Retaining Wall at the Limit State
Patrick J. Fox, Ph.D., P.E., D.GE, F.ASCE, Pennsylvania State University


3:15 – 4:45 pm
Exposed Geosynthetic Performance (organized by GSI)

Engineered Turf Landfill Closure: How Long Will It Last?
Bryan Scholl, Ph.D., P.E. and Ming Zhu, Ph.D., P.E., Watershed Geosynthetics; Zehong Yuan, Ph.D., P.E., SGI Testing Services

Exposed NPNW GT Exposed Npnw GT Performance at a Large Surface Impoundment For Nearly One Year
Stephan Fourmont, Afitex-Texel Geosynthetics Inc.; Silda Rivas, Alkegen; George Koerner, Ph.D., P.E., CQA, Geosynthetic Institute (GSI)

Exposed Geomembrane Cover Performance at Polk County Landfill in Florida
George A. Reinhart, III, Ph.D., P.E., Jones Edmunds & Associates, Inc.; George Koerner, Ph.D., P.E., CQA, Geosynthetic Institute (GSI)


3:15 – 4:45 pm
Panel Discussion: Improved Pavement Design – A Different Coversation
(organized by FHWA)

This panel of pavements engineers will discuss the current state of pavement design and construction from their perspectives in state departments of transportation (DOT) and the Federal Highway Administration (FHWA), and will address common barriers and opportunities for increased use of geosynthetics in pavements.


Wednesday, February 8

8 – 9:30 am
Fabricated Geosynthetics for Water Retention Projects
(organized by FGI)

Best Practices for Design and Installation of Geosynthetic Floating Covers
Brian Fraser, MBA, Layfield USA; Douglas Hilts, P.E., S.E., Hilts Consulting Group

Operation and Maintenance Guideline for Water Reservoirs
Duff Simbeck, B.S., Simbeck and Associates; Ronald Frobel, P.E., R.K. Frobel & Associates Consulting Engineers; Timothy Stark, Ph.D., P.E., University of Illinois at Urbana-Champaign; Prabeen Joshi, Ph.D., P.Eng., Arcadis Canada; Matthew Kemnitz, Leak Location Services, Inc.

Chambers Dam Reservoir Remediation: Case Study
Patrick Elliott, Viaflex

New Developments in PVC-EIAs for Potable Water Containment Applications
J.P. Lens, Ph.D., Lance Reed and Ray Peebles, Cooley Group

Netherlands Motorway Underpass Case Study
Dick van Regteren and Charlie Angenant, Genap


9:45 – 11:15 am
Importance of Operation and Maintanance Manuals
(organized by FGI)
Panelists: Duff Simbeck, Simbeck Liners, Ron Frobel, R.K. Frobel & Associates, Glen Toepfer, CQA Solutions, Matthew Kemnitz, Leak Location Services, Inc.

This Panel Discussion will assemble four (4) industry leaders to discuss the advantages and disadvantages of giving owners and operators an Operation and Maintenance (O&M) manual for their installed geosynthetics. The panel discussion will commence with a description and discussion of the first FGI O&M Manual for water reservoirs and the checklist included to facilitate periodic inspection. The second FGI O&M Manual for a floating cover system over water reservoirs is under preparation and will be outlined. The FGI thinks an O&M plan should be standard practice for each project to obtain longer service life and meeting project expectations. The panelists will discuss the many significant problems that can be avoided by periodic inspections and minor maintenance, e.g., removal of vegetation on or under the geosynthetics and careful use of equipment around the geosynthetics, such as lawnmowers. As an exposed liner ages, sample coupons of geomembranes can also be removed for testing purposes to help owners determine the remaining life of the geomembrane.  Afterwards, the panelists will answer attendees questions about O&M activities and discuss the benefits of including sample coupons that can be removed for testing to assist owners with determining remaining service of the geomembrane.