BIG SHELL, 1: When currents collide the end result can get messy ... we'll explain on Passport to Texas. Passport to Texas from Texas Parks and Wildlife Only at Big Shell Beach, part of the Padres Island National Shoreline, will you find the convergence of two currents -- one from the north, the other from the south. And it [the currents] throws large amounts of broken up shell [onto the beach] -- and they're large species of clamshells -- and [that's why] the scientists named it the Big Shell. :09 Captain Billy Sandifer is a licensed fishing guide. The commingling currents deposit not only shells onto the beach, but also copious amounts of trash. When these two currents collide, they literally are carrying any kind of debris that has been thrown in the gulf from either direction. :11 This is why Captain Sandifer organizes the annual clean up of Big Shell Beach, which he started back in 1995. And this year's cleanup is fast approaching. This will be our fourteenth event, and we have removed one million thirty thousand pounds of trash off that beach. :09 Scheduled for March 14, this year's event will be the biggest yet, as Big Shell has the distinction of being the repository of debris resulting from Hurricane Ike. It looks like a landfill from one end to the other. All of Gilchrest's and Galveston's missing wood, lawn chairs, jet skis, boats, generators ... I could just go on and on and on ... :16 Volunteer to help, find out how tomorrow, or visit passporttotexas.org today. For Texas Parks and Wildlife ... I'm Cecilia Nasti. Total sound bite time: 0:39.0 Maximum Script time: 0:46.0 Suggested show time: 85.0 = 1:25