The Aspen-Pitkin County airport sits at a pivotal and seminal point in its existence. A new, modern terminal seems likely to be built in the coming decade, though its exact outline remains hazy and just beyond the horizon. A reconfigured airfield plan finally took shape in December after nearly four years of community debate, but the Federal Aviation Administration has yet to comment on it, which could mean a years-long process is just beginning. In short, it’s a daunting time to take over as airport director. “I’m not intimidated,” Dan Bartholomew said Friday from his new office in a portable building tucked next to the arrivals terminal. “I’m excited about it actually. I’m looking forward to digging in and finding solutions and making everybody as happy as they can be.”