A new water tower near the Rogers airport will change the angle and height of descent for planes, but officials say a new instrument will counteract any problems. The instrument called a glide slope instrument landing system lets planes determine how to descend based on the ground terrain. The system has been in place since September. The water tower has been built but has not yet been turned over to the water authority. Rogers airport, used by Wal-Mart`s corporate offices, has the second highest number of takeoffs and landings in Arkansas. The 99 foot tall water tower was approved by the Federal Aviation Administration in 2002. Officials have said that the tower hasn`t affected airport operations so far.