SANTA CLARA, Calif. — Take a left out of Gate C at Levi’s Stadium and navigate down Bill Walsh Way toward the San Francisco 49ers’ practice facility and you come upon a common but unsightly piece of infrastructure: an electrical substation. There are tens of thousands of these stations spread across the U.S. helping to ensure the flow of energy across the electrical grid. But this one, just yards from where the Super Bowl will kick off Sunday, has taken on a particular level of infamy. An