AEG 2020 Virtual Annual Meeting Technical Program
Crossing the San Andreas Fault: Improving the Resilience of the Los Angeles Aqueduct System
2019-2020 Johns Distinguished Lecturer – Scott Lindvall
Scott received his BS in Geology from Stanford University in 1984 and his MS in Geology from San Diego State University in 1988. Dick Jahns was Scott’s undergraduate advisor at Stanford, which makes this award especially meaningful to him. He has spent the majority of his career working for consulting firms specializing in seismic hazards and engineering geology. He currently manages the Lettis Consultants International southern California office.
Scott’s will present his “Crossing the San Andreas Fault: Improving the Resilience of the Los Angeles Aqueduct System” lecture at the meeting. This talk focuses on the Los Angeles Aqueduct crossing of the San Andreas fault in the Elizabeth Tunnel and describes the detailed surface and subsurface geologic investigations used to characterize the architecture of the fault zone at tunnel depth. Historic fault displacement data from global strike-slip faults are presented along with deterministic and probabilistic fault displacement hazard analyses performed to address the new 2019 performance-based seismic design guidelines for the Los Angeles Department of Water and Power.
Our Changing Coastlines: the Intersection of Geologic Processes & People
2020-2021 Jahns Distinguished Lecturer – Cheryl Hapke
Dr. Cheryl J. Hapke has decades of experience in studies of coastal geology and processes of coastal change as they relate to societal issues. She is presently the coordinator of the Florida Coastal Mapping Program and holds a research professorship at the University of South Florida’s College of Marine Science. She also runs a private consulting company: Coastal Science Solutions. She earned her Ph.D in coastal geology from the University of California, Santa Cruz and spent over 20 years as a research scientist with the U.S Geological Survey before taking early retirement from federal service in 2019. Her expertise spans a variety of coastal geomorphic settings, including barrier islands, rocky coastlines, and carbonate coasts. She currently is focused on helping coastal communities with sea-level rise adaptation planning.
Dr. Hapke’s presentation will provide a glimpse into the professional career of a research scientist who’s passion of coastal geology has taken her from the steep slopes of the Big Sur Coast to the barrier islands of NY battered by Hurricane Sandy to the island beaches of the Gulf of Mexico. Regardless of the location or the geomorphology of the coastline, Dr. Hapke explores how coastlines change in response to storms, tides and sea-level rise, focusing on the vulnerabilities that changing conditions bring to communities, infrastructure, and the natural environment around them. Over the course of her lecture series, she will explore how geology and humans intersect at the coast and how science can be used not only to understand how a coastal system works but also how that knowledge can be used to help managers, planners, and decision-makers best balance natural processes and societal needs.
Technical Sessions – Full presentation schedule will be available in July after all of the abstracts have been scheduled
Hot Topics Panel - Walker Lane and Mount St. Helens
Moderators: Sarah Kalika and John Sager
Walker Lane - James Faulds, PhD, Nevada State Geologist and professor in the Mackay School of Earth Sciences and Engineering at the University of Nevada, Reno
The Walker Lane shear zone is located in a portion of eastern California (east of the Sierra Nevada mountain range) and follows a trend northward into western Nevada. Recent large earthquakes, including the two major quakes in Ridgecrest (July 2019), followed by additional earthquakes Carson City (March and May 2020), Owens Valley (June 2020) appear to represent general movement trending northward into Nevada and appear to represent activity along this shear zone. The Walker Lane accommodates nearly 12 mm/year of shear between the Sierra Nevada – Great Valley Block and the North American plate. Geologists, including our panel speakers, have presumed that the Walker Lane might represent a transition to a new future plate boundary, assuming the activity on the San Andreas Fault gradually decreases. The San Andreas Fault currently accommodates 75% of the northward movement of the Pacific Plate.
Mount St. Helens
Mount St. Helens, located in southwest Washington, erupted 40 years ago this year. Several engineering features were constructed to mitigate the immediate and long term impacts from the eruption and subsequent debris avalanche, mud flow, and flooding. These features included stabilization of the Spirit Lake blockage, a gated outlet structure and tunnel to maintain a safe post-eruption lake level at Spirit Lake, and the Sediment Retention Structure (a sediment retaining earth dam on the North Fork of the Tuttle River). New studies are currently being performed to reassess the hazards that still exist to establish what actions may be necessary to to maintain these existing projects and continue to protect the downstream communities. This work is being accomplished through cooperative joint efforts of the U.S. Forest Service, the U.S. Geological Survey, and the U.S. Army Corps of Engineers. The 3 person panel will discuss ongoing and planned work in the following areas: Debris blockage characterization, a planned exploration program in 2021; Geophysical surveys (seismic and GPR) of the eruption debris blockage at Spirit Lake; Seismic Hazard Mapping; and, dam safety issues with respect to the blockage, and tunnel outlet.
Dams and Levees Lessons Learned Symposium
Conveners – Bruce Hilton, Holly Nichols, Cassandra Wagner and Keith Richards
Risk assessments for dams - led by a keynote presentation by Doug Boyer with FERC, who will be discussing the evolution of risk-informed decision making and where the industry is headed.
Dam remediation and investigations - led by a keynote presentation by Brian Greene with Gannett Fleming, who will discuss the recent installation of a cutoff wall at the East Branch Dam in Wilcox, Pennsylvania. Levee risk assessments, incidents, and repairs, led by a keynote presentation by Dave Rogers with Missouri University of Science and Technology, who is well-versed in levee case histories.
Engineering Geology for Tunnels and Underground Construction Symposium
Conveners: Paul Headland, Ike Isaacson, and Mike Piepenburg
We will open this session with a 60-minute presentation by our Keynote Presenter Dr. Ed Cording, who will discuss the early days of engineering geology in underground practice, the development of the many of the key tenants of our work, and then fast forward to the continued application of our ability to observe and record our findings in ever-increasingly more challenging work conditions. With over 60 years of experience in the field and around the world, Dr. Cording’s presentation should valuable lessons and insights for the listeners. Four other presentations will follow Dr. Cording and cover a wide range of topics (large and small diameter tunnels) and ground conditions (soft ground and rock) including; tunneling through carbonate reef structures and shale, developing a design for a microtunnel drive around a vertical curve through water-bearing sediments, and using directional drilling to locate old historic tunnels in the Rocky Mountains. With a wide variety of locations, tunnel sizes, and ground conditions, we hope there will be something of interest for all of our colleagues and hope you will join us.
Environmental Symposium 2020: RADON Occurrence and Remediation
Conveners: Patricia Bryan and Loren Lasky
AEG’s Virtual Environmental Symposium 2020 will focus on Radon, a naturally-occurring, radioactive and carcinogenic emerging contaminant. This half day symposium, Wednesday afternoon, September 16, 2020 will feature an invited panel of Radon experts from academia and industry. Four in-depth presentations will highlight the latest USGS Radon mapping results and discuss the cutting-edge remediation techniques available now for mitigation of Radon, both in indoor air and in drinking water.
Naturally Occurring Asbestos Symposium: Hindsight in 2020 and Lessons for the Future
Conveners: Sarah Kalika and Mark Bailey
Asbestos occurs naturally across the United States and around the world within mafic and ultramafic rocks as well as soils derived from these rocks. Join us to learn about naturally occurring asbestos (NOA) and elongate mineral particles (EMPs), what minerals are regulated as asbestos, where they are typically found, sampling and analysis methods, health effects from inhalation, and the varying regulations that apply to construction workers, the public, and waste soil. We will additionally discuss emerging issues relating to efforts to further define worker protection procedures and limit the use of asbestos in consumer products.
Applied Geoscience Methods for Problem Solving - A Gallery of Practical Examples
Conveners: Gerry L. Stirwalt and David F. Fenster
This technical session will focus on oral presentations that showcase a broad spectrum of practical examples illustrating how a range of geoscientific methods were creatively and innovatively applied to evaluate potential problems, collect and evaluate data pertinent to those problems, propose solutions to resolve them, and communicate information in a manner that enables all interested stakeholders to understand the geoscientific basis for the proposed solutions. The co-conveners of the session seek abstracts from students, academicians, consultants, industry representatives, and federal employees that broadly address the use of applied geoscientific methods.
Landslide Symposium: Seeking Stable Slopes in a Time of Rapid Change
Conveners: Kevin McCoy and Casey Dowling
Seeking stable slopes in a time of rapid change: This symposium will present case studies and field-based research of landslide processes and landslide hazard evaluation, management, mitigation and risk reduction in the frameworks of historical and contemporary societal needs. Topics include field studies of landslide activity, morphology, and geometry; comparative evaluation of historical and contemporary mining-related geohazards from a technical and social standpoint, and impacts of climate change on landslide processes.
Student Poster Competition
Please submit your abstracts for review by the committee by June 15, 2020. Above instructions apply. If your abstract is accepted, you will be asked to submit a 20 minute video presentation of your poster. All attendees will be viewing the videos and voting on their favorite. Prizes will be awarded for First Place ($250), Second Place ($150), Third Place ($75), and Fourth Place ($25) based on the attendees votes. We will be sending all of the details as we get closer to the Virtual Annual Meeting.
AEG 2020 Virtual Annual Meeting Call for Abstracts
(Oral and Poster Presentations - Poster presentations will not be live)
(We will ask for a video of your poster presentation that will be posted to the for attendees to view at anytime)
Instructions for Writing and Submitting your Abstract
Abstract submission deadline has been extended for the following sessions only:
Engineering Geology for Tunnels and Underground Construction
Naturally Occurring Asbestos: Hindsight in 2020 and Lessons for the Future
Font: Type abstract in 10 point Times font.
Title: Bold your title (please do not use all caps for your title). Your title may not be more than 120 characters in length, including spaces. Please capitalize the first letter of all primary words as in the example below.
Author(s): Type last name first, followed by first name, followed by Company or Affiliation and email address. All co-authors should be listed as first name, last name and email address only. Group names will not be accepted as an author. Please see example below.
Abstract: Your abstract body is limited to 300 words or less. Tables or photos may be added to your abstract for a fee of $150.00 each.
Indicate your preferred mode of presentation: Oral, Poster, or Either (meaning no preference).
Invited Papers: If your paper was invited for one of the symposia sessions, please indicate the appropriate session on your submittal.
Please do not submit an abstract if you cannot present at the 2020 Virtual Annual Meeting. Please have a backup author prepared to give your presentation should you not be able to attend. Technical Program modifications after July 15, 2020 are highly discouraged. We must receive your registration for the meeting by August 1, 2020 in order for your abstract to be published in the Program with Abstracts.
Your abstract will be reviewed for content and formatting; notifications of acceptance/rejection will be sent by June 30, 2020.
Password: Portland2020 (do not use your Membership login)
Deadline for submittal is June 15, 2020.
“Your Country is Falling Apart” Response to Recent Landslides by the North Carolina Geological Survey
Bauer, Jennifer, North Carolina Geological Survey, ; Richard M. Wooten; Kenneth A. Gillon; Thomas J. Douglas
Since August 2009, the mountains of Western North Carolina have received 42 inches of rainfall, 16 inches above normal, relieving the region of a two-year drought. These rain events have also increased soil moisture, raised groundwater levels, and triggered over 40 landslide events in the region. As part of its commitment to public safety, the North Carolina Geological Survey has responded to fifteen of these events to evaluate slope stability and provide information to assist state and local agencies and the public. These response efforts have included requests from emergency management officials, erosion control officers, and town planners concerned about the life, health, safety and property of their citizens. Response activities include stability assessment and monitoring of sites during recovery and clean-up efforts; assisting in determining the nature and extent of the slope failures; mapping the affected area and areas that could be affected (e.g. hazard zonation and debris flow inundation modeling), making Geographic Information System (GIS) maps to assist emergency management officials in their response and contingency planning; and communicating findings to the appropriate officials, public, and the media. Mapping and data collected at these sites is incorporated into a slope movement-slope movement deposit geodatabase. All of the slope movements to which the NCGS responded occurred on slopes that have been modified in some way by human activity; four of them have damaged six structures and four threaten homes, one of which has been condemned. This paper will illustrate several of these landslide investigations and responses, as well as give a brief timeline of rainfall events correlating to these slope failures.