PROJ00106 - Laserfiche WebLink

Home Browse Search

I I I I I I I I I I I I I I I I I I Based on City Council and Yater Board direction during the formulation process, the first two alternatives represented the only viable combinations of Plan Elements which should be considered. The inefficient use of the City's Transfer Decree water (91 percent of the storable water will be left in the river due to limited storage capacity) was a major concern of the Council and Board, thus the following was selected as the last alternative: 3. Construct a reservoir at Maitland Canyon to a total capacity of 7,350 AF. This would provide the City with an increased capability to utilize Transfer Decree water and balance use of its various supply sources. It would also provide a greater emergency storage supply than the other alternatives considered. These alternatives were evaluated based on deficit reduction, cost, and social/environmental impacts. The results of these evaluations are presented in Table 4. Along with each Plan Element capable of eliminating the Design Condition deficit on its own merit, the alternatives were then considered for final recommendations to the City. CONCLUSIONS An assumption made throughout the Phase II study was that the City's population growth, raw water demand, and water supplies would grow to the levels defined under the Design Conditions by the year 2015. It is therefore necessary that the City's growth and portfolio be closely monitored to ensure that significant deviations from the Design Conditions do not occur. Yith this in mind, the Phase II study led to the following conclusions: o The capacity of the Chasteen Grove water treatment plant would be exceeded by demand in the year 2002 (13,600 acre-feet/year (AFY) with a population of 64,600). A capacity of 46 mgd would be required by the year 2015 under the Design Conditions. o A deficit of 2,745 acre-feet (AF) could occur approximately once every 100 years under the Design Conditions. -9- I