On July 15, 2009, a pipeline accident at Sylvarena, Mississippi involved Boardwalk Pipeline Partners, Southern Natural Gas and Kinder Morgan in an explosion that killed one person and injured three. The explosion occurred at a natural gas metering station under construction while it was being pressure tested with nitrogen. There was no fire. The workers were "literally right on top" of the explosion; their injuries were the result of pressure, not heat. One was injured when part of the pipe fell on him. The explosion snapped and bent a pipeline connected to a massive separator unit which was slung several yards.