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INTRODUCTION <br />The City of Orono has requested this report to determine the feasibility <br />of constructing storm sever in the Highwood Lake Minnetonka Subdivision. The <br />existing storm sewer system does not provide adequate capacity for the drain- <br />age area. The residents in the area experienced significant flooding during <br />the July rain storms. <br />Two alternates are provided to upgrade the storm sever system. Alternate <br />I would provide for constructing the storm sewer down an existing alley east <br />of Lot 11. Alternate II would provide for constructing the storm sewer along <br />tho alignment of the existing pipe. <br />The storm water runoff from Highwood Road drains to the lake between lots <br />a causing erosion problems. Modification of the crown on Highwood Road and the <br />placement of a berm curb is also proposed as a part of this project. <br />DISCUSSION <br />j The Highwood storm sewer drainage area is approximately 8.6 acres as shown <br />j� on Figure 1. The park area north of County Road No. 19 drains to the north <br />i <br />across County Road No. 151. <br />i� <br />The drainage area is currently served by an inadequate storm sewer aye- <br />tem. The outfall line consists of a conglomerate of pipe types and sizes put <br />together as development occurred. The construction of a new storm sewer sys- <br />tem is desirable to solve the current problem. <br />- 3 - <br />Rpt13933 <br />