By Emon Reiser The JW Marriott Miami Turnberry Resort & Spa, formerly known as the Turnberry Isle Miami resort and golf club, unveiled a water park attraction Tuesday that’s part of the property’s major expansion plans. Tidal Cove Waterpark will have a 60-foot tower with seven water slides, a 4,000-square-foot kids pool, a surf simulation pool, 25 private cabanas, two private event lawns at 15,000 square feet and 12,000 square feet, a new retail store and two dining venues. Surf…