October 2020 Technical Noon Webinar
By Zoom Videoconferencing Technology
(Registration is Required - See Details Below)
Wednesday October 21, 2020
12:00 – 1:00 p.m.
85 Years of Service from El Vado Dam and Looking Toward Another 85 Years
Mike Hamman, P.E.
Middle Rio Grande Conservancy District
ABSTRACT: The Middle Rio Grande Conservancy District began constructing El Vado Dam and Reservoir in 1928 and it entered service in the fall of 1935. It is sited on the Rio Chama 150 miles north of Albuquerque and is a unique structure that uses a quarter inch steel faceplate membrane attached to girders bedded upon a rock-fill embankment on its upstream face (see following figure). A steel lined spillway chute placed on erodible shale with a concrete flip bucket has essentially failed limiting the reservoir volume to 70% of capacity. Mike will discuss an analysis by the US Bureau of Reclamation’s Dam Safety program that determined that El Vado Dam has three possible failure modes (faceplate, spillway or embankment) and the approach to rehabilitate the dam. The $110M project with 85% federal funding is due to start in the summer of 2021 and the reservoir must be essentially empty following the spring runoff of 2023 in order to complete the faceplate resurfacing with a new vinyl geomembrane and grout placement.
SPEAKER BIOGRAPHY: Mike A. Hamman, PE has over 35 years of water resources management and development experience in the public sector at the local, state, tribal and federal levels. He served as the Area Manager for the Bureau of Reclamation in Albuquerque for 5 years and is completing his 6th year as the Chief Executive Officer/Chief Engineer for the Middle Rio Grande Conservancy District.
REGISTRATION: Register at https://www.rmsawwa.org/event/NMOctoberWebinar. Registration is limited to the first 100 participants. All attendees must pre-register for this webinar by Tuesday evening, 10/20/20 at 5:00 p.m. This is required to maintain a record of those attending to satisfy training requirements for PE licensure or Water/Wastewater Operator Certification. Operators will be asked for NM Operator Certification number on the online registration form. Continuing education is only available in New Mexico.
NOVEMBER 18 WEBINAR: Dr. Pei Xu, professor of civil Engineering at NMSU, will discuss her desalination research program.