"-6" . "Prospect Valley, Colorado"@en . "1477.06"^^ . "Prospect Valley is a populated place in Weld County, Colorado, United States. The Post Office at Keenesburg serves the Prospect Valley postal address. SH 52 runs east and west through the community."@en . . . "1477.0"^^ . . . "80643 (Keenesburg)" . . "-7" .