SAN FRANCISCO (AP) — There’s a hidden corner of the City by the Bay where rusted cranes used to build WWII battleships loom over dilapidated artist studios, where working-class fishermen bob up against first-class ocean liners docked for repair.Residents of San Francisco’s Dogpatch neighborhood overlook the rough-and-tumble Pier 70 waterfront and bask in the smell of fresh fish, the cacophony of fog horns and Canadian geese, the jumble of Victorian cottages tucked between corrugated barns and industrial brick icons of the late 1800s.It’s a nautical nugget where few tourists have ventured. A secret stash of cheap artist studios in old clapboard pier offices commands a view of the rusted bones of crumbling canneries, metal scrapyards and silent smokestacks. And it has one of the only working boat yards in San Francisco, where boaters can dry dock for repairs and grab a beer at The Ramp.The city plans to redevelop Pier 70, hoping to capitalize on its historic charms while providing badly needed jobs, commercial and residential space — all while maintaining the neighborhood essence that dates back to the mid-1800s when the Union Iron Works, Bethlehem Steel, Pacific Rolling Mills and the Spreckels Sugar refinery dominated the waterfront.“The winds of change are blowing south and it’s time to get Pier 70 and this area back into economic use,” said Kathleen Diohep, project manager at the Port of San Francisco for the redevelopment plan.