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FLOOD05882
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Last modified
1/25/2010 7:07:11 PM
Creation date
10/5/2006 1:51:07 AM
Metadata
Fields
Template:
Floodplain Documents
County
Statewide
Community
State of Colorado
Stream Name
All
Basin
Statewide
Title
Floodplain Study Review and Designation program - SOQ
Date
4/7/2000
Prepared For
State of Colorado
Prepared By
McLaughlin Water Engineers, Ltd.
Floodplain - Doc Type
Miscellaneous
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<br />;"t:." <br /> <br />. ..~Io-.a,.'" <br /> <br /> <br /> <br />Relevant Project ~)(.perlence <br /> <br />Drainage Study Reviews <br />Superior Metropolitan District 1 <br />Superior, Colorado <br /> <br />In 1985 the small Town of Superior and <br />Richmond Homes shared a vision of creating the <br />new community of Rock Creek. Lack of water <br />was a primary obstacle preventing this vision <br />from becoming a reality, MWE formulated and <br />implemented a comprehensive water plan that <br />not only obtained an adequate water source, but <br />now helps to conserve water and protect water <br />quality from resulting degradation that is inherent <br />at urban development. The Rock Creek <br />community is the first in the state of Colorado to <br />implement a comprehensive plan for quality <br />enhancement of urban stormwater runoff. Under <br />this plan, all storm flows from the development <br />are routed through specially-designed extended <br />detention basins for water treatment prior to <br />discharge into Rock Creek; thereby improving <br />water quality downstream of this community. <br /> <br />The Master Drainage Plan provides for a regional <br />system of stormwater channels and detention <br />facilities that provide management of the <br />increased runoff due to urbanization and multiple <br />use of the channels and ponds for open space, <br />recreational greenway corridors, wetland <br />preservation, and riparian habitat. This work has <br />involved numerous reviews of developers' <br />drainage studies and construction plans for their <br />conformance with the Rock Creek master <br />drainage plan. MWE also worked on the <br />application to obtain an Individual 404 Permit for <br />the twenty-two drainage, roadway, and <br />development projects proposed for the Rock <br />Creek development. The application included <br />alternatives, a mitigation schedule, and <br />maintenance plan. <br /> <br />City of Brighton <br />Drainage Reviews <br />Brighton, Colorado <br /> <br />F or the past 10 years MWE has performed <br />numerous drainage-related engineering services <br />for the City of Brighton. We developed a financing <br />and management plan for implementing the City's <br />proposed drainage program and established! <br /> <br />summarized capital requirements, recommended <br />equitable allocation of costs (growth pays its own <br />way), and set forth financing methodologies, <br />Subsequently, MINE was retained to develop a <br />stonnwater management plan for a 1,640-acre <br />area to relieve stl"eet flooding and provide storm <br />sewer capacity for developing areas, The plan <br />consisted of two new outfalls, the North and <br />South, to the South Platte River, The outfall plan <br />included collection sewers and inlets, large trunk <br />sewers, open channel outlets to the Platte River, <br />and regional detention storage. MWE also <br />prepared final design and construction drawings <br />for the entire South Outfall and the first three <br />phases of the North Outfall. <br /> <br />Subsequent work: has included reviewing <br />developers' drainage studies and construction <br />plans for conformance with the City of Brighton <br />Drainage Criteria and the Outfall Systems Plan, <br /> <br />Stapleton Drainllge Planning Review <br />Urban Drainage and Flood Control District <br />Denver, Colorado <br /> <br />For the Urban Drainage and Flood Control <br />District, MINE reviewed the drainage <br />improvements costs for the proposed Stapleton <br />Redevelopment. The focus of MWE's review was <br />the cost of diverting flows up to and including the <br />1 O-year flood discharge (1,000 cfs) from lrondale <br />Gulch and conveying them through the Stapleton <br />site to Sand Creek. <br /> <br />The bridge costs are the most significant Irondale <br />Diversion cost item, However, the bridges near <br />Sand Creek are an integral part of the concept for <br />the wildlife corridor connection with the RMA <br />refuge. If these bridges are eliminated, then the <br />wildlife corridor connection to Sand Creek is <br />eliminated, If these bridges are constructed to <br />accommodate wildlife movement, as was the <br />case at 56th Avenue, then drainage conveyance <br />is essentially provided at no charge, since the <br />bridges can easily convey the peak flows from <br />Stapleton. Assuming that the riparian wildlife <br />corridor concept is still a part of the Stapleton <br />Redevelopment plan, MWE concluded that the <br />costs for conveying Irondale Gulch diversion <br />flows through the Stapleton site could be <br />reduced, <br /> <br />r <br />" <br />
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