Laramie.

"Night was clear initially with good transparency and fair seeing. Clouds developed over Cheyanne as equipment was set up. During first set clouds increased in a line from north to south. Line of clouds shifted east, but a bank of clouds remianed over the Fort Collins light dome, illuminated. Prior to clouds, the Milky Way was visivle as a complete arc washed out only in the Cheyanne lightdome about 5 degrees above the north horizon. Sagittarius star cloud was still visible over the Fort Collins light dome, although details like the Prancing Horse were difficult to see. Overhead M13 was easily visible naked eye, as was M31. SQM of 31.33; SQM-L 21.21 at Zenith at 0045."

"Seeing fair, transparency fair, NELM in Hercules/Draco, glare sources many, including white strobes on a tower definitely brighter than Jupiter, nearby 3 or 4 constant sources brighter than Jupiter, plus several dozen sources fainter than Jupiter in distance, including pulsing red tower lights of radio station near Fort Collins and wind farm near Cheyenne. Two bright large light domes observed, one from Cheyenne brightest, much brighter than Venus, perhaps thin crescent moon brightness, casts shadows, damages night vision, extending nearly to zenith early, to 60 degrees above horizon late, at least 45 degrees wide. Fort Collins/Denver extends to 45 degrees above horizon early, 35 late, fainter than Cheyenne, just as broad, appears redder. Zone of uniform darkness observed about 60 degrees in diameter, offset from zenith to southwest. Milky Way detail quite good especially late overhead, but Sagittarius star cloud much diminished by Ft. Collins glow, and disappears below that to the south. Late, through Cassiopeia is invisible because of Cheyenne, but Cygnus area relatively unaffected. Several small light domes seen in addition but fainter than Jupiter and extend no higher than 10 degrees above the horizon. Airglow only seen to the southwest and west because of haze and bright light domes, seemed moderate or low."