DCA is developing maps that indicate areas along the Delta waterways that could be used by different sized barges, areas that may not support barge traffic, and the relative potential for waterways to support construction and operation of barge landings to serve potential construction sites within the NOP corridors (which included the Central and Eastern corridors). The information will be used by DCA to determine the accessibility of potential tunnel launch shaft sites, as presented in the February 12, 2020, SEC meeting presentation.