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The objective of the Drainage Design Manual, Hydrology, is to provide criteria and design guidance for estimation of peak discharges and runoff volumes for use in identifying flood hazards and design of drainage facilities in Maricopa County. This manual provides a convenient source of technical information that is specifically tailored to the unique hydrologic, environmental and social character of Maricopa County; and a consistent set of criteria that, when used by the local governing agencies and the land development community, will result in uniform drainage practices throughout the County.
The DRAFT Hydrology Manual does not include any agency-specific policies and standards. It only contains technical guidance.
The EFFECTIVE Hydrology Manual (January 1, 1995) is still in effect until further notice, unless the draft manual is specifically identified for use by an agency.
Please address comments and questions to Tom Loomis of the Flood Control District at (602) 506-4767 or trl@mail.maricopa.gov.
The effective version of the Manual is only available in a digital PDF (Portable Document File) format, which requires the free Acrobat Reader to view. To save the document directly to your hard drive, right click on the link and select "Save Target as." If you do not already have the Acrobat Reader, click on the following Acrobat link:
The draft version is only available in a digital PDF or ZIP format.
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