Thumbnails. No border: thumbnail links to a 640 pixel image. Pink border: thumbnail links to bigger image. Blue border: left hand half of thumbnail links to bigger image; right hand half links to image description on the Wikimedia Commons.
Taken from about here, I thought I was taking the Rocky Flats Plant (read about different Federal agencies doing battle with each other) but in fact this an unidentified gravel or cement works. The Rocky Flats Plant was about a mile to the southeast and very little trace no remains.
Rockies
Gross Dam and Reservoir. Water supply for Denver. Most of the rain falls on the west of the Rockies and Denver is on the east so various water capture points on the west lead water through a tunnel and to this reservoir.
Volunteer park rangers provide a narrative between Denver and Grand Junction