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5.03: Approve Preparation and Submittal of Stormwater Management Plan for The COR Development Manager Lazan reviewed the staff report. At the request of Chairperson McGlone, Development Manager Lazan described the stormwater assumptions used for The COR to create a system wide design. He explained that when taking outside assumptions and reworking the Stormwater Management Plan, it results in very large structures and investment in infrastructure that may not be necessary. Commissioner Elvig returned to the meeting at 7:08 p.m. Development Manager Lazan completed presentation of the staff report by reviewing contributions to The COR and new criteria for stormwater treatment. He noted the question came up why The COR had to meet the criteria for the new Lower Rum River Water Management Organization's (LRRWMO) Third Generation Plan since this project was approved between its previous Plan and new Plan. He presented the issues under consideration to resolve off -site and on- site issues as well as system and site design requirements. Development Manager Lazan noted the LRRWMO may not require a full study /plan; however, it would be a good idea to have it completed. Commissioner Strommen clarified the LRRWMO is not interested in micromanaging the project and did not want to force the City to prepare an entirely new Stormwater Management Plan for The COR. Development Manager Lazan presented the grading plan and goals of the Stormwater Management Plan. - He recommended the HRA authorize the work necessary to complete the proposed Stormwater Management Plan for The COR and direct the Development Team to submit the plan for LRRWMO approval. Commissioner Wise asked if the stormwater fee charged to residents is based on the size of the pipe. Development Manager Lazan stated that fee is based on the cost of the overall plan, not just the size of one pipe. Commissioner Wise asked if the stormwater fees have been exorbitantly high. Development Manager Lazan stated given the pipe sizes he has seen, he would venture that is the case. He noted staff can revisit those assumptions /fees. Commissioner Elvig asked if the City was building a more or less densified project than anticipated by the last developer. Development Manager Lazan indicated the project is roughly the same with the biggest disparity in density being in the off -site contributions (60 -acre basin to the north of North Commons). Housing and Redevelopment Authority / November 20, 2012 Page 3 of 6