Data Collection Report - Flood Control District of Maricopa County

Durango Area Drainage Master PlanData Collection ReportI. INTRODUCTIONThis Data Collection Report has been prepared for the Flood ControlDistrict of Maricopa County (FCDMC) as part of the Durango AreaDrainage Master Plan (ADMP). The study location is shown on FigureI-1.A. PurposeThe purpose of the Durango ADMP is to evaluate the existing drainagestudies conducted in the Floodplain Delineation of the Tolleson Area -Hydrology Report, dated March 24, 1999 which defined the Durangowatershed by quantifying the extent of flooding problems. There aretwo major objectives of the study. The first is to develop a plan tocontrol runoff 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-of-way requirements, utility conflicts, and potential projectparticipants for the preferred alternatives. The study area encompassesapproximately 68 square miles which includes the cities of Avondale,Tolleson, and Phoenix, as well as unincorporated Maricopa County 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 Data Collection Phase of 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 of planned residentialdevelopments, recreational facilities, and environmental issues andopportunities within the study area. The purpose of this Data CollectionReport is to describe the data gathering process and to present thefindings. Results from this report will be used in later phases of thestudy.B. Scope of ProjectThe scope of work includes professional 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 of work includes publiccoordination, document/data review and research, survey and mapping,hydrology, hydraulics, floodplain delineation, identification of drainageproblems, development of alternative solutions, cost estimates, andpreparation of preliminary design plans based on a preferred alternative.The project consists of 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. Data Collection Data Collection ReportSurvey & Mapping2. Level I Analysis Potential Alternatives SubmittalFigure I-1. Study Location3. Level II Analysis Alternatives Analysis Report4. Level III Analysis Recommended Design ReportPreliminary Design Plans5. Implementation Final SubmittalMaintenance PlanThis Data Collection Report is the final product for Phase I of theproject.DIBBLE & ASSOCIATES 1 DURANGO ADMPDATA COLLECTION REPORT