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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 QUALIFICATIONS <br />DUDEK Proposal for Centennial Lake Renovation 7 <br />25E-20 <br />4. Wildlife I Fishery Enhancement <br />a. Excessive planktonic algae <br />Dudek will design and implement a comprehensive <br />water quality control plan that eliminates the need for <br />b. No vascular rooted vegetation observed <br />In lake <br />chemical inputs into the lake for water quality. Our <br />proposed design includes a mechanical water quality <br />r- High concentration of hydrogen sulfide <br />control system with improved vertical and horizontal <br />released from lake bottom <br />circulation of the lake water, to filter and capture macro <br />trash in the skimmers, and drastically improved aeration <br />d. No nutrient I biological controls observed <br />at lake <br />of the lake water, a biological water quality control <br />system utilizing biological filters and naturally occurring <br />e. Use of chemical herbicides/algaecides for <br />bacteria to remove nutrients from the lake water and <br />algae control (copper sulfate) <br />reduce algal growth, and planting of aquatic vascular <br />f. Excessive waterfowl population <br />aquatic vegetation to remove nutrients via root uptake, <br />i. No observed waterfowl management <br />an environmental water quality control system to control <br />the waterfowl population and create habitat away from <br />measures in place <br />public areas for birds to reside, and improve fish stocking <br />to diversify the fish and aquatic animals, and a socio - <br />ii. No observed lake user education program <br />in place <br />behavioral water quality control plan to deter feeding of <br />g. Excessive trash/user debris an lake water <br />waterfowl at the park with signage and education <br />surface <br />1. Insufficient waste management facilities <br />h. Lake pollution complaint on August 16, <br />2016 <br />1. Fish kill reported September 8, 2016 <br />J. No observed natural or artificial reefs <br />k. No fishery management plan <br />S. Seepage losses <br />a. Separate fill line meter for lake <br />It was determined that lake water losses were minimal <br />b. Site Is used for soil injection wells <br />and acceptable - no improvements needed. Portions of <br />the lake liner will be disturbed as a part of this project so, <br />our design includes compaction requirements and a <br />c. Soil liner samples Indicate silty sands with <br />6 to 10% clay and 36.50% fines <br />water application of ESS -13 soil conditioner to restore <br />impermeability to the disturbed portions of the soil liner <br />1. One sample indicated sand with 2% fines <br />(day) <br />and further improve impermeability of the entire lake liner <br />6. Lake Management Plan x. <br />a. Waterfowl Management Plan <br />We have included a socio -behavioral water quality plan <br />-- - - - --- - <br />b. Public Awareness I Behaviors <br />in the design that includes signage and kiosks, and <br />increasing the number of trash receptacles near the lake <br />to.improve water quality. Our Lake Manual will provide a <br />detailed discussion of the socio -behavioral water quality <br />I. Feeding waterfowl <br />I ii. Disposal of hot coals <br />elements included in our Lake Renovation Plan <br />III. Trash disposal <br />7. Park/ Facility <br />a. Site grading <br />Site grading and landscape and trees in the park outside <br />of the lake will not be addressed as a part of this project. <br />These deficiencies will be resolved in a separate park <br />DUDEK Proposal for Centennial Lake Renovation 7 <br />25E-20 <br />
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