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25E - AGMT WATER ENGINEERING CONSULTING
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09/18/2018
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25E - AGMT WATER ENGINEERING CONSULTING
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Last modified
9/13/2018 5:01:52 PM
Creation date
9/13/2018 4:56:12 PM
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City Clerk
Doc Type
Agenda Packet
Agency
Public Works
Item #
25E
Date
9/18/2018
Destruction Year
2023
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STATEMENT OF QUALIFICAITONS <br />The system design redundancies reflect good lake ecosystem design practices to provide overlapping <br />controls of the numerous elements that affect water quality of the lake so that the lake can self -adjust <br />to changes in the local environment and self -maintain desirable water quality under most conditions. <br />Final Design and Construction Documents Phase <br />Upon completion of review of the 60% Design Development project plans, the Dudek team will <br />transition into Final Design and (90%-100%) Construction Documents. The final design phase of the <br />project is the phase when all of the final design detailing and Information is added to the construction <br />plans to create a design that clearly reflects the design Intent and conveys the construction information <br />to the project construction contractor. In this final phase of design all of the information and details <br />necessary to construct and Implement the complete lake renovation plan will be included in the <br />construction plans and specification documents. The final design will include a complete set of <br />construction plans, specifications, engineer's estimates, and a Lake Manual. Dudek will coordinate <br />with OCWD and obtain final construction details and information from OCWD to coordinate their final <br />design details and modifications of the existing pump vault wet -well to accommodate backwash <br />discharge from their nearby Injection well. Some of the unique features that will be included in our <br />final construction documents and plans include the following: <br />• Our design plans will be reviewed by our in house public and personnel safety specialist <br />to provide input and insight on safety issues to minimize potential safety hazards present <br />in the design of the renovation plan. <br />Our design plans will include design of a water quality control system including a biological <br />filter and lake aeration system designed by a treatment system design engineer with a <br />PhD in treatment system design. We recommended that lake nutrient loading be mitigated <br />by circulating lake water through a biological filter. Biofilters utilize naturally occurring <br />microorganisms to consume and transform lake water nutrients and dissolved organics, <br />which minimizes algae growth and improves water clarity. <br />FIGURE 4. EXAMPLE OF PROPOSED BIOFILTRATION SYSTEM <br />Our design plans will include grading design and a plant palette developed by a waterfowl <br />specialist, restoration ecologist, and a landscape architect working together to design and <br />create a habitat Island and an environment that is favorable to native waterfowl and <br />encourages non-native and migratory species to migrate on their normal pattern. <br />Our design plans will include an aquatic vegetation planting plan for the lake designed by <br />a landscape architect, botanist, water quality treatment engineer, and fishery <br />DUDEK Proposal for Centennial Lake Renovation 14 <br />25E-27 <br />
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