C153773 Feasibility Study - Laserfiche WebLink

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I I I I I I I I I I I I I I I I I I I Bear Creek. As development upstream increases, it is obvious that the ratio of virgin water in Bear Creek will be lower. The proposed additional raw water storage reservoir could reduce resulting water quality problems by supplying good quality water from storage for treatment during periods of low flow when water in Bear Creek is at its poorest quality. Ideally the storage reservoir should be filled during the spring or other high runoff periods - when the stream water quality is at its best. At full build out, however, Morrison must utilize its water rights to their fullest extent, when in priority, therefore, diversions from Bear Creek must eventually occur throughout the year. Additionally, the reservoir would improve water quality by providing maturation type treatment. However, as residents have noticed by the use of the Morrison Operating Reservoir, algae growth in a reservoir can affect the taste of the water. The approach used in developing the Master Plan has been to segregate the facilities into functional subsystems (to facilitate understanding and analysis) - then to formulate alternate plans; analyze and compare the alternatives; both as to cost and comparability with overall water system goals; and then to select the optimum design. The Morrison system has been analyzed using a breakdown into four subsystems. These are: 1. Water Source: This subsystem is mostly fixed, consisting of the present Town water rights, augmentation plans, with Cooley Reservoir assumed as the primary storage. 2. Raw Water Deljverv: This is the system that will deliver diverted flow from Bear Creek to either Cooley Reservoir or the water treatment plant. 3. Water Treatment: Planning involves location, sizing, and processes. 4. Distribution Svstem: This includes finished water transmission mains, storage tanks, booster stations, and pressure zone design. Local or "retail" water distribution lines in subdivisions are not addressed in this Master Plan. STUDY AREA The Morrison municipal water system currently serves approximately 500 residents in an 820- acre area. The population within the Town has remained nearly constant for the last two decades at 400 to 500 people. Negotiations were initiated in 1982 to expand municipal water service to an 800-acre development east of Town, known as Red Rocks Center and Red Rocks Business Park. Negotiations are presently underway for an annexation of 110 acres south of Town, including some limited provisions for utility service. In addition, Morrison may eventually 7O-OBO.035:MSTR-PLN 1-5