Thursday, September 23

Technical Session #3 GeoUAS (Drones) Symposium

Data Acquisition and Processing Methods is the subject of AEG’s 2021 UAS (Unmanned Aerial Systems) Symposium. The use of UAVs (Unmanned Aerial Vehicles, aka Drones) is a rapidly advancing technology that allows for flying of various sensors (photogrammetric cameras, lidar, infrared, etc.) to capture important data sets for projects. The data, typically with survey control is processed by specialized software packages in ordered to produce three-dimensional models for project use (DTM-Digital Terrain Model, DEM4Digital Elevation Model, etc.) These models are very beneficial for project design, construction and monitoring. Various project types will be presented that detail data acquisition and processing methods, all in this half-day symposium of invited Speakers, Wednesday afternoon, September 22, 2021.

Convener: Paul Santi Room: Villa

Time Speaker Title

2:00–2:40 Thomas Chen Integrating High-Resolution UAV-Sourced Data in a Machine Learning Framework for River Monitoring 2:40–3:00 Andrew Graber UAS-Based Monitoring of Rockfall in Glenwood Canyon, CO: Preliminary Result 3:20–4:00 Ethan Guzek Improving Rockslope Stability Investigations Using UAV-Based 3D Modeling 4:00–4:40 Julia Yeakley Using Drone Imagery to 3D Model and Aid in Remediation Design for an Emergency Landslip in Jefferson County, Ohio

THURSDAY, SEPTEMBER 23 – MORNING Technical Session #4 Dams and Levees Symposium – Risk-n-the-River, Part I

(Sponsored by Schnabel Engineering)

AEG’s Dams Technical Working Group is pleased to host the Dams and Levees Symposium at the 2021 Annual Meeting in San Antonio. The theme of this year’s symposium is “Risk-n-the-River” and will be presented in two parts. This session will lead off with a presentation on the history of Fontana Dam by Scott Walker from the Tennessee Valley Authority. Other speakers represent a combination of federal government agencies and private consultants, and topics include filter compatibility and internal stability, paleoflood analyses, geophysical studies, control of artesian pressures during drilling, block theory applied to scour in a rock spillway, ALARP (as low as reasonably practical) considerations, and lessons learned - sometimes the hard way.

Conveners: Thomas Terry and Holly NicholsRoom: Carranza

Time Speaker Title

8:00–8:40 Scott Walker The Dam is Growing?!?: A Case History of Fontana Dam 8:40–9:00 Sampson Ash Filter Compatibility and Internal Stability Evaluation of Three Dam Sites 9:00–9:20 Edwin Friend 20 Years of Lessons Learned – Looking Back on a Dam Rewarding Career 9:20–9:40 Gary Rogers Control of Artesian Pressures When Drilling Dams and Levees 9:40–10:00 Trever Ensele Thru-Dam Seismic Tomography: Leveraging Geophysical Techniques for Condition Assessment of a Thin-arch Concrete Dam

10:20–10:40 Bryan Freymuth Field-based Paleoflood Analyses in a Travel-restricted World: Updates from the Guadalupe River, Comal County, Texas 10:40–11:00 Scott Lewis Beardsley Afterbay Dam Maintenance Project – Using Data and Evaluations to Revise Designs (Presented by Andy Kositsky) 11:00–11:20 Thomas Terry ALARP Design Considerations for Dams and Levees 11:20–11:40 Michael George Application of the Block Theory Rock Erodibility Method to Evaluate Scour Potential and Risk at the Don Pedro Dam Emergency Spillway

WANTS YOUR MEETING PHOTOS!

Please submit your BEST SHOTS of field trips, guest tours, technical sessions, social gatherings, and people just having fun. See page 3 for photo requirements. We also welcome REPORTS on the various field trips and other events for possible publication in the meeting summary in the Winter issue of AEG News. Submit photos to news@aegweb.org.