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<br />b, Includes measures to curtail vandalism: <br />1) Locking backllow prevention device en- <br />closures <br />2) Locking controller enclosures <br />3) Vandal resistent screws <br />4) Lockable valve boxes <br /> <br />1 O. Codes <br />a Designs will comply with all applicable <br />codes <br /> <br />11, Specilications <br />a. CDOH Standard Specilications and Pro- <br />ject Special Provisions will be adapted to <br />the individual site and project <br /> <br />12, Freeze Prevention <br />a. Manual Drain Valves (MDV) <br />1) Installed a1the low points 01 the main <br />line pipe and the lateral line pipe <br />2) Outlets shall be piped to a gravel sump <br />located below drain valve <br />b, Air Pressure Device <br />1) One inch quick coupling valve <br />2) Has the capacity to purge the whole sys- <br />tem with compressed air <br /> <br />13. General System Design <br />a. Proven irrigation methods <br />b, Standardized equipment <br />c, Design with ease 01 maintenance in mind <br />d, Design 10 accommodateluture highway <br />build-oUllimils <br />e. Utilize water conserving equipment; use <br />low precipation heads wherever possible <br />I, Size and schedule water needs to those 01 <br />mature plants once establishment require- <br />ments are met <br />g. Turf areas <br />1) Irrigated I1f automatlce pop-up heads <br />which are controlled separately Irom other <br />plant materials <br />2) Design should use low application rate <br />sprinklers whenever possible <br />h. Trees, shrubs, groundcover <br /> <br />1) Irrigated according to analysis of econo- <br />my, maintenance, water requirements <br />2) Use low application rate, bubblers, mi- <br />cro-jet, or drip systems <br />3) Consider on !he basis 01 fewest number <br />01 components, points to monitor, and <br />proximity to !ralfic. <br />4) Overspray onto pavement should be <br />controlled carefully to avoid waste and <br />highway l1azards <br />i, Locate controllers in safe, easily accessi- <br />ble areas to minimize riSk to crews <br />j, Irrigation conponent near shoulders are es- <br />i1y damaged and should be located a mini- <br />mum 014 leetlrom edge 01 pavemenl un- <br />less curb and gutter exists <br />k. Proprietary items should be kepi to a mini- <br />mum by giving three equivalents, whenever <br />possible; proprietary items should be in- <br />cluded in tabulation sheets, not on design <br />sheets or details wilh the exception 01 cen- <br />tralized computer control components -- <br />e,g, Motorola <br /> <br />.. <br /> <br />14, Drip Design Crileria <br />a, Piping shall be sized lor maximum rates of <br />flow and there should be a flushing safety <br />factor for each lateral emitter <br />b, Grade change and resultant pressure <br />variation will be taken into account In design <br />c, Minimum pressure at emitter inlets will be <br />governed by manufacturer's recommenda- <br />tions <br /> <br />See irrigation system design quality review check <br />sheet on the following page. <br /> <br />56. <br />