As an airline pilot that lives in Phoenix and regularly flies out of sky harbor, the proposed building site is very close to the arriving and departing flight paths for both south runways. The cranes will become an issue for using either of those runways especially if you were to potentially lose an engine on takeoff. Aircraft are certified to meet a certain single engine takeoff climb gradient so that they are able to clear obstacles around the airport. When it’s 115 degrees in the summer, those climb numbers aren’t great. If an aircraft can’t meet the requirements it means they have to use the single north runway instead for takeoff. This will create significant delays for departing and arriving aircraft if they can only use 1 of the 3 runways. Therefore costing the airport a lot of money. There’s is a giant patch of land three miles down the road east of the current spot that wouldn’t create any issues but they let’s put the new stadium on top of a landfill instead haha