BETA Technologies is expanding its footprint in the North Country with the announcement of a new $41 million addition to its facility at the Plattsburgh International Airport.The electric aerospace company said it will develop a new, upgraded facility to serve as the manufacturing and final assembly hub for its all-electric aircraft.The company will also use the new facility as the permanent test flight and aircraft delivery center for its operations in the region.BETA has pledged to create 85 full-time jobs at the facility in exchange for a $20 million grant from Clinton County through the Empire State Development Regional Economic and Community Assistance Program. Mark Henry, Chairman of the Clinton County Legislature, said in a statement, “Clinton County has been steadfast in supporting economic growth and workforce development, particularly in regard to the transportation…