Small Aircraft; Low Wing; 1 Eng; Fixed Gear
Air Traffic Control Developmental
Confusion; Distraction; Troubleshooting
ATC Issue All Types; Conflict Ground Conflict; Less Severe; Deviation / Discrepancy - Procedural Clearance; Ground Event / Encounter Ground Equipment Issue; Ground Incursion Runway; No Specific Anomaly Occurred Unwanted Situation
Air Traffic Control Issued Advisory / Alert; Air Traffic Control Issued New Clearance; Air Traffic Control Separated Traffic; Air Traffic Control Provided Assistance
Human Factors; ATC Equipment / Nav Facility / Buildings; Environment - Non Weather Related; Airport
Two Controllers in the Tower. I was on Ground Control. Aircraft X landed long on Runway 24 and appeared to be able to exit at [Taxiway] H. Aircraft X was instructed to exit at [Taxiway] H but delayed for a reason that was not communicated to the controllers. Aircraft X was then instructed to exit onto [Taxiway] A at the end of the runway; as it appeared; they were making a turn that was too tight to exit at [Taxiway] H in a timely manner. Aircraft X then began a high-speed taxi to [Taxiway] A; at which point tower sent Aircraft Y traffic on final around. I was scanning the runways and observed Aircraft X make a turn and clear the runway edge lines with all parts of the aircraft. At that time; the Local Controller cleared Aircraft Y for takeoff; while Operations called the Tower on our high frequency radio asking if Aircraft X required assistance. Aircraft X was still taxiing at this time; but had not contacted Ground; as they were not observed beyond the hold short lines. Aircraft X was not visible due to a hangar west of the tower obstructing the view of '[Taxiway] A' that Aircraft X was using. Local Controller issued a cancel takeoff instruction out of abundance of caution because Aircraft X was not observed in a timely manner by GC (Ground Control) or LC (Local Control). The instruction was stepped on; and it was decided that it would be less safe to reissue the instruction as Aircraft Z was now rotating and Aircraft X had been observed clear of runway. When Aircraft X contacted Ground; Ground Control instructed Aircraft X to expedite taxi past the hold short lines for Runway 24 and then observed the aircraft again visually.The hangar west of the tower presents an imminent safety concern that diminishes ATC's ability to provide safe; orderly; and expeditious service to the users of POU. The hangar needs to be lowered; or the tower needs to be raised.
POU Tower Ground Controller reported a hanger blocks the view of the runway and issues related to the blockage.