Colorado Association of Geotechnical Engineers - Event Information
CAGE April Meeting
Oroville Dam Spillway Presented by: John France with AECOM
At a height of 770 feet, Oroville Dam is the tallest dam in the United States. On February 7, 2017, a section of the concrete chute slab of the service spillway at Oroville Dam failed during spillway discharge. Several days later, as the California Department of Water Resources was evaluating and managing discharges through the damaged service spillway during a large rainfall event, the emergency spillway activated for the first time in the project’s history. The emergency spillway flow resulted in significant erosion of the hillside below the crest structure, leading to concern for the integrity of the emergency spillway and the evacuation of nearly 190,000 downstream residents. The Federal Energy Regulatory Commission mandated a forensic evaluation of the failure of the service spillway chute and the damage to emergency spillway. This presentation will include discussion of the findings of the six-person Independent Forensic Team, including discussions of physical factors, human / organization factors, and lessons to be learned from the incident.
Mr. France has more than 40 years of experience in engineering consulting and design. Most of Mr. France’s technical work for the past 34 years has focused on dams and water retention structures. This experience includes dam safety inspections and analyses, detailed geotechnical and geological field and laboratory investigations, hazard classification, seepage and static stability analyses and evaluations, seismic stability/seismic deformation analyses, conceptual and final designs of new structures, rehabilitation of existing structures, consultation during construction, and risk analyses. He has served on numerous senior technical review boards / panels for the U.S. Army Corps of Engineers (USACE); the U.S. Department of the Interior, Bureau of Reclamation; BC Hydro; and Brookfield Renewable Energy. Mr. France was the leader of a the six-person Independent Forensic Team tasked with evaluating the February 2017 spillway incident at Oroville Dam, California.
One sponsorship is available for each CAGE monthly meeting. Sponsorships include a display table, acknowledgement on each meeting announcement, acknowledgement slide displayed during meal, thank you announcement by Board Director to attendees, and one registration. Sponsorship registration can be made through the online registration for the meeting, or by contacting Becky Roland at 303-551-3266.
11:30 AM - 01:00 PM Mountain
Lakewood Country Club 6800 W 10th Ave Lakewood, CO 80214