Durango Area Drainage Master Plan<strong>Data</strong> <strong>Collection</strong> <strong>Report</strong>I. INTRODUCTIONThis <strong>Data</strong> <strong>Collection</strong> <strong>Report</strong> has been prepared for the <strong>Flood</strong> <strong>Control</strong><strong>District</strong> <strong>of</strong> <strong>Maricopa</strong> <strong>County</strong> (FCDMC) as part <strong>of</strong> the Durango AreaDrainage Master Plan (ADMP). The study location is shown on FigureI-1.A. PurposeThe purpose <strong>of</strong> the Durango ADMP is to evaluate the existing drainagestudies conducted in the <strong>Flood</strong>plain Delineation <strong>of</strong> the Tolleson Area -Hydrology <strong>Report</strong>, dated March 24, 1999 which defined the Durangowatershed by quantifying the extent <strong>of</strong> flooding problems. There aretwo major objectives <strong>of</strong> the study. The first is to develop a plan tocontrol run<strong>of</strong>f to prevent flood damage in the watershed. The second isto develop an implementation plan to manage the interim conditions dueto discontinuous development in order to preserve the ability to provideprotection to lands downstream from 100-year flood events. The planwill develop and identify preliminary costs, alignments, typical sections,right-<strong>of</strong>-way requirements, utility conflicts, and potential projectparticipants for the preferred alternatives. The study area encompassesapproximately 68 square miles which includes the cities <strong>of</strong> Avondale,Tolleson, and Phoenix, as well as unincorporated <strong>Maricopa</strong> <strong>County</strong> asshown on Figure I-2. The study area is bounded by the Salt, Gila, andAgua Fria rivers and extends northward to I-10 and eastward to I-17.The <strong>Data</strong> <strong>Collection</strong> Phase <strong>of</strong> the ADMP includes identifying knownflooding locations and collecting data regarding existing and proposeddrainage facilities, major natural washes, and existing utilities. The datacollection effort also includes identification <strong>of</strong> planned residentialdevelopments, recreational facilities, and environmental issues andopportunities within the study area. The purpose <strong>of</strong> this <strong>Data</strong> <strong>Collection</strong><strong>Report</strong> is to describe the data gathering process and to present thefindings. Results from this report will be used in later phases <strong>of</strong> thestudy.B. Scope <strong>of</strong> ProjectThe scope <strong>of</strong> work includes pr<strong>of</strong>essional engineering services necessaryfor developing an area drainage master plan (ADMP) to identify drainageproblems and develop cost effective solutions for a storm watercollection and disposal system. The scope <strong>of</strong> work includes publiccoordination, document/data review and research, survey and mapping,hydrology, hydraulics, floodplain delineation, identification <strong>of</strong> drainageproblems, development <strong>of</strong> alternative solutions, cost estimates, andpreparation <strong>of</strong> preliminary design plans based on a preferred alternative.The project consists <strong>of</strong> five phases resulting in an implementation planwith estimated costs for a recommended plan to address the drainageissues within the study area. The five project phases are summarized asfollows:PhaseProducts1. <strong>Data</strong> <strong>Collection</strong> <strong>Data</strong> <strong>Collection</strong> <strong>Report</strong>Survey & Mapping2. Level I Analysis Potential Alternatives SubmittalFigure I-1. Study Location3. Level II Analysis Alternatives Analysis <strong>Report</strong>4. Level III Analysis Recommended Design <strong>Report</strong>Preliminary Design Plans5. Implementation Final SubmittalMaintenance PlanThis <strong>Data</strong> <strong>Collection</strong> <strong>Report</strong> is the final product for Phase I <strong>of</strong> theproject.DIBBLE & ASSOCIATES 1 DURANGO ADMPDATA COLLECTION REPORT
C. Study AreaThe study area encompasses approximately 68 square miles bounded byI-10 on the north, I-17 on the east, the Salt and Gila Rivers on the south,and the Agua Fria River on the west. The project area can be generallyanalyzed in three geographic areas. The study areas are shown onFigure I-2.The Northern Study Area extends the full width <strong>of</strong> the study area fromthe Agua Fria River eastward to I-17 and from I-10 southward to theSouthern Pacific Railroad at approximately Buckeye Road. TheSouthwest Study Area extends from the Agua Fria River eastweard toapproximately 83 rd Avenue and from the Southern Pacific Railroadsouthward to the Gila River. The Southeast Study Area extends fromapproximately 83 rd Avenue eastward to I-17 and from the SouthernPacific Railroad southward to the Salt River.DIBBLE & ASSOCIATES 2 DURANGO ADMPDATA COLLECTION REPORT
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