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<br />. <br /> <br />. <br /> <br />. <br /> <br />P Plat, CherryHil1 Bluffs 2nd <br />March 19, 1993 <br /> <br />Page 3 <br /> <br />The majority of the drainage from this plat ends up in a large <br />pond labeled Outlot B. This pond has been identified by the <br />City as having the potential to be a regional storm water <br />retention pond. Although the City storm water management <br />policies have not been established, staff feels it is <br />appropriate that this pond be in City ownership. Staff also <br />concurs with Mr. Maurer's comment that an outlet to the pond is <br />necessary. This would be a metered outlet, which slowly <br />releases storm water to control the ultimate level of the <br />pond. This is important to make sure appropriate lowest floor <br />elevations for adjacent dwellings can be established. <br /> <br />The construction of the storm sewer is proposed to take place <br />above the ordinary high water mark of the pond labeled Outlot <br />B. Therefore, permits from the Army Corps of Engineers or DNR <br />should not be required. This will be verified prior to final <br />plat approval. <br /> <br />NOISE <br /> <br />MnDOT's concern with noise levels from the highway to adjacent <br />dwellings is well founded. MnDOT will be conducting a study on <br />noise levels which City staff should receive in two weeks. The <br />developer is proposing to build a berm with plantings adjacent <br />to the right-of-way of Highway 169 to reduce noise levels. <br />Property adjacent to Highway 169 also lies within a United <br />Power Association easement. Clearance from UPA to construct a <br />berm will be required of the developer. <br /> <br />GAS LINE EASEMENT <br /> <br />There is a 75 foot wide Northern Natural Gas Company easement <br />that runs diagonally across the property included in the plat. <br />This easement contains a high pressure gas line. Past mineral <br />excavation on this site avoided the area that contained the gas <br />line. The gas line is now at the high point of the land. This <br />affects the construction of improvements for this plat as <br />follows: <br /> <br />1. Roads <br />The gas company will <br />to the gas line. <br />need to be verified. <br /> <br />require m1n1mum cover from the road <br />I believe this is four feet, but will <br /> <br />2. Water Lines <br />Water lines do not have to stay at a specific grade so <br />they can readily be placed under a gas line. <br /> <br />3. Storm Piping <br />Storm piping grades will be limited by the location of the <br />gas line. However, this situation is workable. <br />