SAINT JOHN - The east side of Saint John is ruled by three things: the refinery, retail and rain. Every time a big storm rolls in, businesses and basements get soaked. And the problem is only getting worse. That’s because this sprawling side of the city is built on top of its largest urban watershed — Marsh Creek. It’s a 4100-hectare patch of wetlands, but it’s a far cry from looking like a Ducks Unlimited commercial. That’s because Saint John flushes 16 million litres of raw sewage into its harbour every day, with Marsh Creek a major dumping ground. “Whatever disease you want — it’s there,” says Colin Forsythe, a community wetlands coordinator with the Atlantic Coastal Action Program. That's where his organization steps in.  The Saint John chapter is proposing to rejuvenate the area, with dreams beyond a new Costco and its discounted vats of mixed nuts.