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<br />& Ci(). 0/ Littleton <br /> <br /> <br />Massey Dri'l'N ana 5JCD (SouthJ M.cljOf Drit1nage"Nay Planning UpdiHe <br />Conceplu<ll /Jt'WJn Report <br />February 2006 <br /> <br />Executive Summary <br /> <br />Purpose and Objective <br /> <br />Table ES - 1 <br />A encies Invited to Partici ate in Master Plan Process <br />Centennial Water and Sanitation District Environmental Protection A enc Re ion VIII <br />Chatfield Watershed Authori Federal Emer en Mana ement A enc <br />Colorado De artment of Trans ortation Foothills Park and Recreation District <br />Colorado Division of Wildlife Ken Ca I Ranch Master Association <br />Colorado State Parks Meadow Ranch Master Association <br />Colorado Water Conservation Board PBS&J on behalf of CDOT <br />Deer Creek Golf Club South Suburban Parks and Recreation District <br />Denver Public Libra US Arm Cor s of En ineers <br />Denver Re ional Council of Governments <br /> <br />This report presents the results of a project entitled "Massey Draw and SJCD (South) Major <br />Drainageway Planning Update." The project was authorized by the Urban Drainage and Flood Control <br />District (UDFCD). Jefferson County and the City of Littleton are project co-sponsors. The project <br />study area, presented in Figure ES.1 , consists of the Massey Draw and SJCD (South) watersheds. <br />Except for the North Tributary of SJCD (South), both watersheds were originally studied in 1979. The <br />results of this study were presented in a report titled Major Drainageway Planning, Massey Draw & <br />North Tributary, SJCD (South) 6200 & Tributaries (Original Plan), The North Tributary of SJCO <br />(South) was studied in 1976 and the results were presented in the major drainageway planning study <br />for SJCD (North)-Basin 6100. <br /> <br />Table ES - 2 <br /> <br />I <br /> <br />Since the Original Plan was prepared, the Ken Caryl Ranch area east and west of the hogback (C. <br />470) have been developed, the Natural Resources Conservation Service (NRCS), formerly Soil <br />Conservation Service, produced more detailed soils maps that indicated substantially lower infiltration <br />rates west of the hogback, and new hydrologic modeling methodologies have been adopted. The <br />combination of these factors resulted in significantly increased flow rates at the hogback. In 1982, the <br />hydrology for Massey Draw was updated, which resulted in the 1 DO-year flows being increased from <br />23 percent to 211 percent at various points along Massey Draw. In addition, Jefferson County, <br />UDFCD, and private developers have constructed drainage improvements along the drainageways. <br />The purpose of the Massey Draw and SJCD (South) Major Drainageway Planning Update is to reflect <br />the revised hydrology and the drainage improvements that have been constructed, and to identify <br />future drainageway and flood control improvements that are needed. <br /> <br />Planning Process <br /> <br />Oraanizations and Reoresentatives That Participated in the Master Plannina Process <br />Oraanization Renresentative <br />Urban Drainage and Flood Control District Ben Urbonas, Project Director <br /> Bill OeGroot <br /> Kevin Stewart <br />Jefferson County Paula Lundquist <br />Alecia Cone <br />Citv of Littleton Bob Deeds <br />Ken Carvl Master Association Sean Warren <br />Foothills Park and Recreation District Bill Kieck <br />Centennial Water and Sanitation District Rick McCloud <br />Colorado Deeartment of Transoortation Justin Werdel <br />Colorado Water Conservation Board Larry Lana <br />Deer Creek Golf Club Jason Murphy <br /> Rick Schultz <br /> Tim Walker <br />Denver Renional Council of Governments Lar Munier <br />Meadow Ranch Master Association Inc. Board of Directors Chris Plant <br />Meadow Ranch Master Association I KC & Associates, LLC KathVChristensen <br />PBS&J (on behalf of Colorado Deoartment of Transportation) Harrv Strasser <br />Professionallnvestiaative Enaineers Paul Duncan <br />US Armv Cores of Enaineers Scott Franklin <br />JR Engineering Jim Fitzmorris <br /> Tim Schulte <br />Carruth Proeerties Greo Meeter <br />Hiah CountrY Enaineerino Adam Powell <br />Olsson Associates Bruce Buttner <br /> David Krickbaum <br /> Deb Ohlinger <br /> Dave Skuodas <br /> Amv Kurtz <br /> <br />The hydrologic models were prepared and calibrated to approximate flow rates from previous studies. <br />The model results were presented in the Hydrology Study dated April 2004. When the hydrology was <br />accepted, problem areas were identified using the model results and field observations. Alternatives <br />were developed for each reach to address the identified problems and presented to the project <br />sponsors at progress meetings. Based on input from the sponsors, the alternatives were refined and <br />presented in the Alternative Evaluation Report dated February 2005. <br /> <br />The project sponsors reviewed the recommendations in the Alternative Evaluation Report. Direction to <br />proceed with the conceptual design of the Selected Plan was received on April 11, 2005. The <br />Selected Plan is included in Appendix D. The meeting minutes are included in Appendix C. <br /> <br />Public meetings were held on October 19, 2004 and April 5, 2005 at Falcon Bluffs Middle School. <br />Fliers announcing the date and location were mailed to the residents in the watershed. 45 to 60 <br />people attended the meetings. The purpose of the first meeting was to present the alternatives and to <br />solicit input from the residents. The selected plan was presented at the second meeting. Comment <br />forms were made available. The forms that were returned are included in Appendix C, along with the <br />minutes and sign-in sheets from the meetings. <br /> <br />Tables ES - 1 and ES - 2 show the agencies that were invited to participate in the planning process, <br />and the individuals who were involved in the planning process, respectively. <br /> <br />0\ <br /> <br />ES.l <br />