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• <br />• <br />• <br />Planning & Zoning Board <br />May 9, 2007 <br />Page 7 <br />Board members wondered why the ponds did not include a bench for safety reasons. Mr. <br />Studenski explained that the applicant is not creating any water storage areas and the <br />ponds will not be designed to be long -term. <br />Mr. Studenski informed the board that caution signs are typical with development, and <br />signs will be placed along Birch St. so it is not necessary to include this as a condition. <br />Applicant, Mr. Brian Bourassa, MFRA Engineering, Plymouth, MN, and Adam Parker, <br />hydrologist, answered questions for the board. Mr. Bourassa stated that berms around the <br />dewatering equipment would be a great idea. He explained that the material they are <br />going after is sandy material for building roads and house pads, and they will need an <br />estimated 50,000 to 60,000 cubic yards for The Preserve site. Mr. Bourassa said he lives <br />in the area and is aware that traffic is difficult. He likes the idea of warning signs on <br />Birch St. and 12th Ave, and is open to staff's recommendations regarding flagging. Mr. <br />Bourassa showed the board members the location of the temporary storage on the site. <br />He noted that the Environmental Board had suggested a specific seed mix for vegetation, <br />and he will work with Marty Asleson at the City. He said he didn't show a bench <br />because there is no development plan there, but realizes at some time a bench will <br />probably be required. He noted that the water level in the ponds is estimated to remain <br />what it is today. He said they do not anticipate accessing the third excavation site. He <br />described that if they use six to eight 12 -yard trucks to haul the estimated 50,000 cubic <br />yards of dirt during haul hours, it would take 13 days if everything ran perfectly. <br />Realistically, they estimate it will take four to six weeks to haul the dirt for The Preserve. <br />Mr. Parker explained to the board the dewatering process that will be used on the site. <br />He explained that a number of engineers on staff will help determine the best vegetation <br />and will follow the city's recommendations. He explained that SWPPPs will limit dust <br />and keep topsoil in place. <br />Board members expressed concern about water levels, safety of the excavation site and <br />street clean-up and maintenance. Mr. Parker remarked that the vegetation used will be <br />selected to handle the water levels, with only three to four foot fluctuations expected. <br />Mr. Bourassa added that there will be no discharge from these basins and expects there to <br />be less water or the same as there is today. <br />Mr. Bourassa stated that silt or snow fencing will be used for safety. He explained that <br />they are proposing a rock trench entrance to knock dirt off the wheels, a silt fence to <br />prevent erosion from the pile, and will comply with requirements regarding street <br />sweeping. <br />Mr. Pogalz pointed out that the application is for an expected use of 90,000 cubic yards, <br />with 50,000 going to The Preserve. He asked if the excess material will be sold to <br />another developer or development and why they should allow him to take the material off <br />site. He asked why they couldn't just take the 50,000 to 60,000 for The Preserve. Mr. <br />Bourassa replied that the purpose is to haul the excess material to a different site. <br />DRAFT MINUTES <br />