we could ask the same thing about AA and DAL.... how many years ago did DFW open?
DL just happens to recognize that leaving the door open even an inch opens a risk that DL doesn't want in its backyard.
Neither did UA at DEN.
DAL/DFW just happened to be the case study to use to make sure that the original airport is rendered unusable.
btw, the DOT says they are not investigating anyone but are instead just looking at facts.
“A number of entities have raised questions and concerns about the possible commercialization of Paulding, and we are looking into those questions and concerns,” DOT spokesman Brian Farber said Friday, in a prepared statement. “We are not focusing on any particular entity. We are simply trying to assess the facts.”
it also appears that DL has asked the DOT to investigate Paulding County.
"Delta has long opposed a proposal by developer Propeller Investments and the Paulding County commission to develop Paulding Northwest Atlanta Airport, a general aviation airport, for commercial aviation. The county and the airline have each asked the Transportation Department to investigate the other."
“The proposal is a waste of taxpayer dollars, violates the city’s restrictions on the land, and would siphon off increasingly scarce federal funding that’s more needed at Hartsfield-Jackson Atlanta International Airport,” Delta said, in a prepared statement.
“It’s also an attempt to subvert the will of the electorate in Paulding County, who overwhelmingly voted out proponents of commercializing this general aviation airport in recent county elections,” the airline said..
further
"In a recent letter to DOT Secretary Anthony Foxx, three electees to the Paulding County Commission say they expect that when they take office in January, they will comprise a majority of the five-member board, and they would oppose the effort to create an alternate airport."
all quotes from
http://www.forbes.com/sites/tedreed/2014/11/01/delta-opposes-second-atlanta-airport-dot-is-not-investigating/?partner=yahootix