It was bounded along most of its length by retaining walls , and the shipping channel was maintained by dredging .
By now , Newtown Creek had become a major industrial waterway , with the city starting to dump raw sewage into it in 1866 .
Newtown Creek was bounded along most of Newtown Creek 's length by retaining walls , and the shipping channel was maintained by dredging .
By now , Newtown Creek had become a major industrial waterway , with the city starting to dump raw sewage into it in 1866 .