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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Lower Big Dry Creek Hydrologic Study <br /> <br />The approach used to address these issues, the findings of the hydrologic analysis completed for <br />this study and specific recommendations follow. <br /> <br />Overview of Analysiis Approach <br /> <br />In order to answer the questions posed by watershed stakeholders, the following activities were <br />completed: <br /> <br />. Review of available stream and watershed characteristics developed in previous studies. <br /> <br />. Identification and assessment of drainage and flood planning and policies in place in the <br />watershed. <br /> <br />. Identification and review of drainage master plans and floodplain delineations completed <br />in the urbanized portion of the watershed. <br /> <br />. Field visits and interviews with landowners in Adams and Weld Counties. <br /> <br />. Research regarding the current state of the practice for storm drainage planning and <br />management, review of comparable case studies in Colorado and identification of <br />evolving approaches to storm drainage management with potential applicability to Big <br />Dry Creek. <br /> <br />. Hydrologic analysis of USGS gage data to determine whether the flow-frequency curve <br />has changed over time. <br /> <br />. Characterization of base flows, focusing on wastewater discharges and irrigation releases <br />and diversions. <br /> <br />. Aerial photo n:view. <br /> <br />. Hydrologic characterization of summer 2004 rainfall events. <br /> <br />971-179.092 <br />June 2005 <br /> <br />Page 2 <br /> <br />Wright Water Engineers, Inc. <br />