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Event
AEG Oregon Chapter - November 2023 Meeting
Abstract:
The Beach Road Landslide in Haines, Alaska occurred on December 2, 2020 when regional weather produced an atmospheric river that delivered historic precipitation and caused significant snowmelt. Several local, state, and national agencies along with local volunteers responded to the event conducting emergency search and rescue operations, and evaluations of the landslide and adjacent terrain. In February 2021, Landslide Technology (LT) along with prime consultant R&M Consultants, Inc. (R&M) were contracted by the State of Alaska Department of Transportation and Public Facilities (DOT&PF) to conduct geotechnical investigations and analyses.
The LT and R&M team conducted a winter reconnaissance in late February 2021. Results of the reconnaissance along with desktop studies of available information were documented in a Preliminary Findings Report dated April 8, 2021. After the snowpack cleared in 2021, geotechnical investigation and instrumentation tasks were performed. In June over 20 test pits were conducted at road grade and higher elevations within and adjacent the slide extents. In July a reconnaissance was conducted and surface extensometers were installed along an eastern tension crack. An extensive subsurface exploration plan, including 12 borings with depths from 40 to 120 feet, was implemented from July to October 2021. Instrumentation was installed in all borings including vibrating wire piezometers and in-place-inclinometers (MEMS ShapeArray systems from Measurand). All instrumentation was connected to an Automatic Data Acquisition System (ADAS) for remote collection to facilitate periodic evaluation and analysis.
This presentation will delve into the details of the geotechnical investigations, interpretations of the site conditions, and stability analysis; and what it reveals about the potential for additional slope movements.
Speaker Bios:
Benjamin A. George, P.E., C.E.G., R.G.
Senior Associate Engineer
Ben has over 18 years of geotechnical and geological engineering experience in the Pacific Northwest including numerous projects in Alaska. He graduated from the Colorado School of Mines in 2002 with a B.Sc. in Geology and Geological Engineering, and in 2004 with a M.Sc. in Geological Engineering. He holds professional engineer licensure in six states, certified engineering geologist licensure in two states and registered/professional geologist licensure in three states. He has spent the majority of his professional career at Cornforth Consultants, Inc./Landslide Technology. His has expertise in slope stability evaluations for both rock and soil, geohazard risk reduction design, and rock cut slope design. As a trained rope access Level II technician from the Society of Professional Rope Access Technicians (SPRAT, he has extensive experience conducting and managing on-slope work efforts for both design and construction of rockfall and rock slope mitigation efforts. He has extensive experience with preparation of plans, specifications, and engineers estimates along with providing construction observation services. Ben resides in Portland, Oregon with his wife and two boys.
Charles M. Hammond, C.E.G., R.G.
Senior Associate Engineering Geologist
Charlie has over 35 years of engineering geology experience investigating landslide and rockfall hazards and risks, seismic hazards, soil and rock material sources, groundwater and dewatering, soil and rock tunneling, and complex geologic conditions. He has consulted on projects in 16 of the United States and one country in Central West Africa. His landslide specialty work includes detailed interpretation, reconnaissance mapping, geologic and geomorphic assessment, subsurface investigation, modeling, causation analysis and risk assessment of future ground movement. He works on individual landslides and regions of widespread ancient landslide terrain. Mr. Hammond is a registered professional engineering geologist in Oregon and Washington and has a Bachelor of Arts degree in Geology from Whitman College in Walla Walla, Washington, and a Master of Science degree in Geology from New Mexico Institute of Mining and Technology in Socorro, New Mexico. Charlie resides in Portland, Oregon with his wife, dog, and cats, while the kid grew up and moved away.
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LocationOld Market Pub (View)
6959 SW Multnomah Blvd.
Portland, OR 97223
United States
Timezone: America/Los_Angeles Online Access Information After you have registered for the event, the online access information for the Zoom meeting will be provided on the order confirmation page and email. Please make sure you copy this link prior to the meeting start time.
Categories
| Kid Friendly: No |
| Dog Friendly: No |
| Non-Smoking: Yes! |
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Contact
| Owner: Oregon AEG |
| On BPT Since: Nov 06, 2016 |
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| AEG Oregon |
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