I have taken for Grand Junction, Colarado Longitude deg 108 33′ 2″ W and latitude deg 39 3′ 50″ N on the date 13-aug-1980 and time 09.30 AM. KP ayanamsa 23d 29m 18s. I cast this in KPStarone software.
If 7th CSL is Rahu then go accordingly. I wish you all the best.