GCL Drainage Channel Completion Miami, AZ May 29, 2012 News·Projects by COMANCO COMANCO > COMANCO BLOG > News > Projects > GCL Drainage Channel Completion Miami, AZ COMANCO completed the installation of a drainage channel with Unreinforced Geosynthetic Clay Liner (GCL) for a total of 279,815 SF. Project was for a tailings impoundment reclamation in Miami, AZ. Crew completed project safely and ahead of schedule. Previous Post Next Post