R-2004-03 adopt portion of “PICM" relating to water system design criteria and improvements

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. e (2) Dead-end lines shall be avoided and may only be considered when a looped or interconnected water main system is not nearby. Such dead-end lines shall only be installed when special approval from the Director of Planning or his designated appointee is obtained. The design of all water distribution systems should include the opportunity for future looping or interconnect of any approved or proposed dead-end line. Dead-end lines within public right-of-way: (1) (3) (a) On pennanent dead-end lines not serving residential cul-de-sacs, the line shall be 8 inches in diameter and shall not exceed more than 700 feet in length from the closest interconnection main line and shall tenninate with a fire hydrant, flushing valve or blow- off valve. (b) In temporary dead-end situations or if the possibility for future extension of the water line exists do not reduce pipe sizes successively. Carry 8-inch diameter pipe to the last appurtenance or the plug. Place the last service as near as possible to the end and install a standard blow off valve and box at the end of the 8-inch diameter line. The maximum length of such a line shall be 700 feet. (c) In unavoidable pennanent dead-end situations, reduce the sizes of pipe successively. Carry an 8- inch pipe to the last fire hydrant, then use 4-inch pipe to the end of the line and lay 4-inch line in accordance with Section 3.02B.l.b. Provide a standard two-inch (2") blow off at the end of the main. (d) Isolate dead end lines with a line valve. (4) Water lines located in a public easement on private property in non-single family residential applications with 1 or more fire hydrants or flushing valves shall be 8-inch diameter with interconnection to at least 2 supply sources when possible. (a) Appropriately sized domestic service shall be taken from the 8-inch lines. (b) The design engineer shall submit water/hydraulic modeling data to the Director of Planning or his designated appointee demonstrating that adequate water pressures can be maintained given projected water demand in non-single family residential applications. (c) The design engineer shall submit water/hydmulic modeling data to the Director of Planning or his designated appointee demonstrating that fire flow capacity is available for the non-single family residential applications. h. Water line placement in side lot easements shall not be allowed except by special approval of the Director of Planning or his designated appointee. Where side lot easement water do receive special approval they may be lain in a continuous steel casing pipe. When such casing is