2015 NGWA Conference on the Upper Great Plains Calendar When: September 22, 2015 – September 23, 2015 all-day 2015-09-22T00:00:00-04:00 2015-09-24T00:00:00-04:00 Where: Little America Hotel & Resort Cheyenne 2800 West Lincolnway Cheyenne, WY 82009 USA Contact: National Ground Water Association Event website