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V-3 I I I I I I I I I I I I I I I I I I I A2. PRELIMINARY SCREENING OF ALTERNATIVES 1. Alternative ~ - pioeline From Gurlev Reservoir TQ ~ Storaae Reservoir. Discussion. Under this option, a pipeline would be extended from Gurley Reservoir to the present Town storage reservoir. This system would utilize existing storage in Gurley Reservoir. Gurley Reservoir has a total storage capacity of 11,432 AF. Norwood will only require about 120 AF in winter from Gurley (168 AF total minus 49 AF from water rights) or about 1.0% (in the year 2035). The pipeline would be for the sole use of the Norwood water system and could be used during both summer and winter months. There are feasible routes on either the west or east side of Gurley Canyon. A separate diversion point would be needed inside Gurley Reservoir. The diversion system must be designed to accommodate problems with icing and shallow water depths in winter. The pipeline could either be designed for pressurized flow or open channel flow. Depending on which method is used, pipe could either be PVC or ductile iron pipe and would range in size from 6 to 8 inches. A hydroelectric system to utilize the elevation drop should be considered. Feasibilitv. The pipeline will essentially use the same water rights and the same amount of water that is previously used out of Gurley Reservoir; however, there will have to be changes in the bylaws and perhaps in some of the me~hods of winter operations. However, it would appear that the impact on storage would be small since Norwood would only use 1% of the capacity of Gurley Reservoir. The supply can generally be considered reliable, although additional investigation would be needed to determine how much residual water remains in Gurley Reservoir in winter. The pipeline will rely entirely on gravity flow and may open up some additional service area On Oak Hill. There may be some construction problems with installation of the pipeline due to presence of rock layers. Also, it will cross a number of different parcels of land and rights-of-way will have to be acquired. Some revenue may be possible through installation of a hydroelectric generation plant.