Water supply. Denver. Metropolitan area Average charge for water in the metropolitan area could increase by 500 to 800% by 1990 with continuing soaring costs and inflation. Post S 24, 1975 p.1 Estimated $918 million to develop a water system adequate for the projected population of metropolitan Denver through the year 2010. RMN S 25, 1975 p.5,28 Denver Metropolitan Water District plan may be placed on 1976 general election ballot. Post 0 9, 1975 p.1