What’s the tallest building in Manteca?It’s the AMC Showplace cinemas at 75 feet.Right behind the cinemas at 60 feet is the Bass Pro Shops.Fifteen years ago in the heyday of Spreckels Sugar that would have been miniscule. The four concrete silos soared 150 feet skyward.Most buildings in Manteca aren’t much taller than a two-story home that typically comes in at 35 feet or less.Now that developers are starting to gear up for an improving economy Manteca could add four structures between 50 and 60 feet each at the proposed Yosemite Square on the northeast corner of the 120 Bypass and Highway 99 interchange.ANF Development envisions Yosemite Square as an employment center with office condos, apartments, and campus-style settings for operations such as call centers, medical concerns and government offices.“We believe the location at the Bypass and 99 is ideal for such use,” said Bill Filios of ANF Development.Four taller structures are proposed along Highway 99 south of El Rancho Mobile Home Park. They could range from 50 to 60 feet and accommodate three to four story operations.A 96-foot tall building has already been approved by the city on the southwest corner of the same interchange.