GRAND JUNCTION, Colo (KKCO) It happened sometime between 6 pm Tuesday July 17tyh, and 8 am Wednesday July 18th. Authorities say some unknown subjects vandalized three houses under construction in the 2200 block of Rock Valley Road. They damaged 10 windows, a gas fire place, door knobs and construction equipment. The damage is estimated to cost around $6,000. If you have any information on this crime, you're encouraged to call crime stoppers at 241-7867.