A photograph print showing Denver & Salt Lake (D&SL) 203, 2-6-6-2, drifting downgrade after helping a westbound freight up to the Moffat Tunnel, below Coal Creek, CO, 25 mph.

A photograph postcard showing Denver & Rio Grande Western (DRGW) 1516, 4-8-2, on freight train No. 72, headed downgrade toward Denver, below Coal Creek, CO, 25 mph.

A photograph postcard showing Denver & Rio Grande Western (DRGW) 3406, 2-8-8-2, on eastbound freight extra consisting of 25 deadhead Pullmans, drifting downgrade below Coal Creek, CO, 10 mph.

A photograph postcard showing Denver & Rio Grande Western (DRGW) 1705, 4-8-4, on passenger train No. 6 "Exposition Flyer", drifting downgrade toward Arena, CO. 40 mph.

A photograph print showing Denver & Rio Grande Western (DRGW) 3601, 2-8-8-2, on a string of reefers westbound, going upgrade above Leyden Junction, CO, 20 mph. [see also 2008.008.6684]

A photograph postcard showing Denver & Rio Grande Western (DRGW) 3601, 2-8-8-2, on a string of reefers westbound from Denver, toward the Rocky Mountains, above Leyden Junction, CO, 20 mph. [rear view, Richard Kindig watching] [see also 2008.008.6683]

A photograph print showing Colorado & Southern (C&S) water tank on the abandoned South Park Line [Denver, South Park & Pacific - narrow gauge abandoned 1937], Solitude, CO, former site of the station, water overflowng tank and freezing into icicles. [see also 2008.008.5931 from 8 years earlier]

A photograph postcard showing Denver & Rio Grande Western (DRGW) 3607, 2-8-8-2, on mixed freight extra, westbound, D&SL 208 helping at rear "west above Fireclay, CO, 15 mph. [see also 2008.008.6678]

A photograph print showing Colorado & Southern (C&S) 69, 2-8-0, narrow gauge, on mixed freight extra, taking on water, Golden, CO.

From abstract: From parts of the area, water for domestic use obtained from the fractured crystalline-rock aquifer contained excessive concentration of dissolved fluoride, dissolved nitrite plus nitrate, dissolved solids, dissolved iron, dissolved manganese, dissolved zinc, coliform bacteria, gross alpha radiation, and gross beta radiation. Based on water-quality analyses from 26 wells located in small urbanized areas, water from 21 of the wells contained excessive concentrations of one of more constituents.

From introduction: Mapping, sampling, and radiometric reconnaissance of the uranium-bearing deposits in the Laramie formation in the vicinity of the Old Leyden coal mine, sec. 28, T. 2 S., R. 71 W., Jefferson County, Colorado (fig. 1), was completed August 10, 1951. Topographic and geologic maps were made of areas approximately 6,000 feet by 3,000 feet (scale 1:2h00), and 1,200 feet by 800 feet (scale 1:600). Underground workings at three clay mines and at the Old Leyden mine were also mapped. With the exception of the 1:600 map, which accompanies this report, these maps will be transmitted later with a more comprehensive report.