Speaker: David Bieber, Bieber Consulting, LLC (Geological, Environmental, and Mining Services)

Talk title: Considerations for the Selection of Excavation Liner Systems

Abstract: Excavations are lined for two reasons: to keep stored water in and to keep ground water out. There are several types of liners used for these purposes including slurry walls, compacted clay liners, geosynthetic liners and hybrid liner systems. The type of liner selected is driven by several factors including the purpose of the excavation, the nature of the material being excavated, the depth to and amount of groundwater present, the depth to and nature of bedrock underlying the excavation, and the availability of suitable liner materials. This presentation summarizes some of the more common factors that determine the type of liner that may be used for an excavation.

Dinner and non-alcoholic beverages provided. Poster session and dinner begin at 5:30, announcements and introductions at about 6:45, talk will begin at about 7 pm.

Thank you to our 2026 Student Night Sponsors:

Kimberlite Level ($500+)
BGC Engineering
GEI Consultants
RJH Consultants, Inc.
Shannon & Wilson
Colorado Geological Survey

Rhodochrosite Level ($250)
Ed Friend
Susan Steele Weir

Molybdenum Level ($100)
Darin Duran
Paul Santi
Holly Brunkal
Rhea Graham
Doug Yadon
Kevin Mininger
Independent Geomechanics LLC
Julia Frazier
Jacquelyn Hagbery
Peggy Ganse
Adam Prochaska

Galena Level ($50)
Kami Gardella
Karl Nelson
David Bernard
Tom Terry
Jill Carlson

Quartz Level ($25)
Rémelle Burton
Adam Malsam