Laserfiche WebLink
<br />Irrigation <br /> <br />1. Sprinklers and sprays shall not be used in areas less than six (6) feet <br />wide. Drip and/or bubblers to be used in these areas. Bubblers shall <br />not exceed one and a half (1.5) gallons per minute per device, and drip <br />systems emitters shall not exceed 1 gallon per hour per dence. <br /> <br />2. To minimize runoff, sprinkler heads with a precipitation rate of <br />eighty-five hundred (.85) inches per hour or less shall be used on <br />slopes exceeding a six to one ratio (over 15% slope) or exceeding a one <br />to ten ratio (or 10% slope) within 10 feet of any hardscaping. <br /> <br />3. No overhead irrigation systems shall be used on slopes exceeding a 2 to <br />1 ratio (or 50% slope). <br /> <br />4. Valves and circuits shall be separated based on water use. (Shrub <br />heads to be grouped under one valve and turfheads to be grouped on <br />another valve for example). <br /> <br />5. Drip or bubbler irrigation systems are required for trees, irregardless <br />if planted alone or in groundcover or turf. <br /> <br />6. Sprinkler head spacing shall be designed for head-to-head coverage. <br />The system should be designed for minimum runoff and overspray onto <br />non-irrigated areas. <br /> <br />7. Serviceable check valves are required where elevation differential may <br />cause low head drainage. (In order to minimize leakage from the lowest <br />point of the irrigation system). <br /> <br />8. Sprinkler heads must have matched precipitation rates within each <br />control valve circuit. <br /> <br />9. All irrigation systems shall be equipped with a controller capable of <br />dual or multiple programming. Controllers must have multiple cycle <br />start capacity and a flexible calendar program. <br /> <br />10. To ensure an effecient use of water, all landscape/irrigation plans <br />should include the following: <br /> <br />A. Estimated annual water use (in gallons) and the area (in square <br />feet) irrigated. <br />B. Precipitation rates for each valve circuit. <br />C. Monthly irrgation schedule for the plant establishment period and <br />for the first year thereafter. <br />D. An operating schedule chart is to be affixed to the irrigation <br />controller station. This chart is to be clearly marked with the <br />timer settings for each circuit for each season. A copy of this <br />operating schedule chart is to be submitted before the final <br />inspection of the project. <br /> <br />Page 3 of 4 <br /> <br />11~08 <br />