Colo. Rev. Stat. § 37-41-118
The board may sell bonds from time to time in such quantities as may be necessary and most advantageous to raise the money for the construction or purchase of canals, reservoir sites, reservoirs, and water rights and works and otherwise to fully carry out the object and purposes of this article. Before making any sale, the board, at a meeting, by resolution, shall declare its intention to sell a specified amount of the bonds and the day and hour and place of such sale and shall cause such resolution to be entered in the minutes and notice of the sale to be given by publication thereof at least twenty days in a daily newspaper published in the city of Denver and in any other newspaper at its discretion. The notice shall state that sealed proposals will be received by the board at its office, for the purchase of the bonds, until the day and hour named in the resolution. At the time appointed, the board shall open the proposals and award the purchase of the bonds to the highest responsible bidder and may reject all bids. The board in no event shall sell any of said bonds for less than ninety-five percent of the face value thereof. In case no bid is made and accepted, the board of directors is hereby authorized to use said bonds for the purchase of canals, reservoir sites, reservoirs, and water rights and works, or for the construction of any canal, reservoir, and works; but such bonds shall not be so disposed of at less than ninety-five percent of the face value thereof.
C.R.S. § 37-41-118