Join us on Friday, October 21st for a field trip to the Chabot Dam Seismic Upgrade Project in Oakland, California. Undertaken by the East Bay Municipal Utility District (EBMUD), this seismic improvement project consists of cement deep soil mixing, installation of a 35-foot-deep seepage collection system, and upgrades to the existing outlet structure at the dam. Join us for a half-day field trip starting at 9am on Friday, October 21st. Cost is $45 for members, $20 for students. Capacity is just 10 people, so sign up here post-haste!
On Friday, June 3, 2016 a group of fourteen intrepid AEG members visited Calaveras Dam for presentations and a site tour. Our first AEGSF field trip in several years, it was deemed a grand success by all involved!
We met at the (rather expansive) field trailers just outside the dam site and, after a site environmental briefing, were treated to two excellent presentations. Glenn Gorski presented on the overall goals, challenges and changes to the project since it began in 2011, highlighting the impacts of previously unmapped landslides which were encountered during excavation.
Bradley Erskine presented on the Naturally Occurring Asbestos (NOA) issues associated with construction, including containment measures, monitoring protocols, and laboratory testing of air samples. We also viewed a fantastic time lapse video of construction completed to date which you can view online here.
After the presentations, we piled into several project pickup trucks and viewed the site from the left and right abutments. We were able to see the entirety of the dam excavation, constructed spillway, and associated geologic exposures.
Glenn and Bradley accompanied our group to both sites and continued to answer questions about construction methods, geologic mapping results, NOA monitoring and abatement efforts, and everything in between. We returned to the field trailers (but not without thorough vehicle and personnel decon!) and enjoyed a tasty lunch while getting to know each other better. After lunch, a few hearty souls continued networking at Bosco’s restaurant and bar in nearby Sunol, CA before heading home.
Our visit to Calaveras Dam was thoroughly educational and enjoyable! Many thanks to all who attended. AEGSF especially thanks Glenn Gorski and Bradley Erskine for their onsite education and assistance, Maria Le of SFPUC for coordinating on behalf of the Owner, Ryan Coe for helping run the field trip and obtaining our all-important lunches, and Courtney Johnson for helping keep track of our member registrations. Let’s do another field trip soon!
All images courtesy of the San Francisco Public Utilities Commission / Photographer E. Morley Beckman.
Monterey Bay Geological Society is hosting a field trip of BLM’s “Coast Dairies Property”, which will include visits to view sand injectites, historic mining locations, and coastal marine terraces. A stop at Ano Nuevo park will also be included in this trip.
Saturday, July 25, 2015
9am – 5pm
Meet at Hwy 1 at Bonny Doon Road (map on MBGS website)
To register for this FREE trip, visit MBGS’s website and click on “Meetings” then “Schedule” then the “RSVP” link. Bring your own lunch and transportation.