In a separate project, SMG replaced lines coming into the stadium after managers expressed concerns the Superdome might be vulnerable to a power failure like the one that struck Candlestick Park during an NFL game in 2011.
Thornton stressed Friday that the dome was drawing only about two-thirds of its power capacity Super Bowl night. He said typical NFL games in late August or September can draw a little more.
Friday’s announcement appeared to absolve Superdome officials of any missteps in the blackout.
City officials had worried that the Super Bowl outage might harm New Orleans’ chances of getting another NFL championship game.
But NFL Commissioner Roger Goodell downplayed that possibility, saying the league planned to keep New Orleans in its Super Bowl plans. Mayor Mitch Landrieu said the city intends to bid for the game again in 2018.
Associated Press Writer Michael Kunzelman in New Orleans contributed to this report.