Storm Drainage System. Heavy rains flow down streets into Street Gutters and Storm Drains and eventually Ballona Creek, a nine-mile waterway that drains the Los Angeles basin. Urban runoff carries an assortment of trash and debris from catch basins where a network of pipes and open channels create a pathway to the Ocean at Santa Monica Bay. Culver City, Los Angeles, California, USA. Culver City, Los Angeles, California, USA