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Mr. Greg Hoag,City of Arden Hills <br /> Page 2 <br /> reconstruction would be$15,000-$20,000. <br /> Option 3 would eliminate the existing slope within the subject property and replace it with stepped or <br /> tiered retaining walls and associated fill,all on private property. The objective of the walls would be to <br /> create finished grades that drain toward the trail,allowing the water to flow past the property as opposed <br /> to flowing into it. The total height of the walls would be approximately five to six feet high. There <br /> would be no significant improvements made to the trail under this option. We estimate the cost to <br /> construct the walls and associated fill would be approximately$25,000-$30,000. <br /> While both options 2 and 3 can be effective at correcting the drainage problems at 4504 Keithson, we <br /> would recommend that the City consider implementing option 2,as it is more cost effective and provides <br /> for the necessary rehabilitation of the trail in this area. <br /> If you have any questions regarding the three options we considered and their associated costs,please do <br /> not hesitate to contact me. We are prepared to assist the City in completing the design for whichever <br /> alternative you find most appropriate. Thank you for allowing Bolton&Menk,Inc.to assist you and the <br /> City of Arden Hills with this project. <br />