Amended Baumunk A North, Baumuck B North, CZOP, Kingsley, Demeo, Light Cap North, Hopson, Ronmary, Lucarino and Stahl units.
Added Mattocks (EOG) unit.
Added Wolpert, Gerbino, Jelliff, B Harris, Weaver and Warren units. These units were originated by Columbia Natural Resources in 2004 and 2005. They ultimately ended up with Range Resources and are now owned by Banpu (Thailand) when Range sold their 29.4% of Chaffee Corners Joint Venture in April 2016.