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            "text": "SECTION V",
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            "text": "DRAINAGE MANAGEMENT PLAN",
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            "text": "INTRODUCTION",
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            "text": "The City of Palmdale is currently planning significant improvements to the existing drainage system. Presently most storm runoff traverses the city as surface flows and are subject to concentration and increased short duration peaking in areas where development is occurring. Nuisance waters travel exceptionally long distances as gutter flows, and attain unacceptable depth and width of flow on flat reaches of streets."
        },
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            "text": "It is the policy of the City of Palmdale that each development greater than five (5) acres (gross) in size be responsible for on-site mitigation of the short duration peak flows caused by the development. In addition, nuisance flows generated on-site shall be mitigated in every development."
        },
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            "text": "Peak flow mitigation shall be accomplished by utilizing landscaped detention, retarding or retention basin(s). Other methods of peak runoff attenuation will be considered on a case by case basis. Until the drainage system allowing the disposal of nuisance flow is in place, the preferred method of nuisance flow mitigation is by subsurface injection utilizing dry wells."
        },
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            "text": "Nonstructural flood protection measures (flood plain management) will be used within the Little Rock Creek and Big Rock Creek Watersheds as well as at upstream portions of all watersheds including Portal Ridge, Amargosa, Anaverde, Pearland, Little Rock and Big Rock drainage areas."
        },
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            "text": "For the flood plain management areas, development within the floodway determined based on the capital flood will not be allowed. Development outside the floodway will be allowed at the current general plan land use designations. Refer to pages V-24 and V-25 for the definition of \"Floodway\"."
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            "text": "After a review of drainage ordinances, hydrologic and hydraulic design manuals, and related material and flood control methodologies for adjacent and nearby drainage authorities, and input from the engineering community, this drainage management plan has been developed for the City of Palmdale as a guide for planning and design of master and local drainage facilities. The major sections in this Drainage Management Plan are: A) Hydrologic Protection Levels, B) Hydrologic Design Standards and Procedures, C) Hydraulic Standards and Procedures, D) Peak Flow Reduction Facilities, E) Percolation test procedure for retention basin design, and F) Nuisance Water Management."
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