https://www.youtube.com/watch?v=0v3tcDNBLOg&t=178s
2020 YouTube Episode 10 of Coffee with Colette: Dr. Colette Von Hanna talks with Geologist Jack Olivier about the importance of protecting the Edwards Aquifer Recharge Zone. They also discuss caves, TCEQ, water permitting, and the Vulcan quarry being built on this highly sensitive area area. He shows charts and graphs on how water flows and shows numerous caves in Comal County.
Comal County Friends of the Night Sky: https://comaldarksky.org
Edwards Aquifer Authority: https://www.edwardsaquifer.org
Stop 3009 Vulcan Quarry: https://www.stop3009vulcanquarry.com
Hill Country Alliance: http://www.hillcountryalliance.org
Preserve Our Hill Country Environment: https://www.preserveourhillcountry.org