The fatal fall of a woman at Empower Field at Mile High after Kenny Chesney’s July 30 concert may have been a freak occurrence, but it was hardly unprecedented: It was the third death of its type at the stadium over the past seven years. Deadly falls at the venue, previously branded as Sports Authority Field at Mile High, occurred in both 2015 and 2016; the latter led to a lawsuit and an out-of-court settlement.…