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' PC Exhibit F <br /> �� B�L�T'�� ��. �'! �:�"��: � , i f�l C'� <br /> • 1 Gonsui��a�g Engtreec� f�. S'ur��ey��s <br /> " ! 2638 Shadow Lane,Suite 200•Chaska, MN 55318-1172 <br /> Phone(952)448-8838•Fax(952}44&8805 <br /> www.bolton-menk.Com <br /> June 3,2015 <br /> City of Qrono <br /> Attn: Melanie Ctirtis <br /> 2750 Keiley Parkway <br /> Orono,MN 55356 <br /> RE: CUP Application 15-3725 <br /> 4167 Highwood Road <br /> Engineering Review#1 <br /> Dear Melanie: <br /> As requested,we have completed an engineering review af the documen�s submitted far the above <br /> referenced project. We offer the following observations,comments, and recommendations for your <br /> consideration: <br /> 1. The Applicant is proposing to perform site grading of approlcimateIy 415 cubic yards and install <br /> riprap along the shoreline. If matarial is to be imported to the site,the City should oonsider the <br /> following: <br /> a. The City Engineer should be allowed to inspect any riprap or fill being imported to the site prior <br /> to it being pIaced. <br /> b. The Applicant should oonfirm with the City Engineer acceptable hours of truck hauling and <br /> provide documentation on the haul route to be used. Acceptable�ours and haul route should be <br /> approved prior to the importing of any riprap or fill. <br /> c. The City Engineer should inspect roadways on kiaul route prior to and following completion of <br /> work to determine whether adverse impacts have occurred.The applicant should be responsible <br /> for the repair to roadways for any adverse impacts. <br /> 2. It is uncleaz what inforrnation is portrayed on the Crreen-Dale Design Plan. A legend should be <br /> included that defines existing and proposed features indicated on the plan. <br /> 3. It appeazs thai work is proposed below the 100 year flood etevation. Any fill below this elevation <br /> must be mitigated for prioz to any fill being placed in the floodplain. Plans should be revised to <br /> indicate location and amount of flaodplain fill proposed and locataon and amount af floodplain <br /> mitigation provided. <br /> 4. The information submitted indicates riprap is to be installed to stabilize the shoreline. Hawever,the <br /> plans are unclear wi�ere riprap is to be placed. The plans should be revised to clearly indicate <br /> location of riprap. The size vf rock to be used for shvrel.ine stabilization should be specified on the <br /> plan. Minimum Class V riprap(b"to 30")is recommended. <br /> 5. The plans are unclear what is proposed for retaining walls. The Green-Dale Design PIan should be <br /> revised to provide more detail for ail proposed retaining wall work. Top of wall and bottom of walI <br /> elevations should be pmvided in key locations{i.e. grade chatxges and alignment changes). Spvt <br /> elevations provided shouId cleazly indicate location of proposed elevation. Walls four feet or greater <br /> in height must be designed by a Professional Engineer,and plans and calculations specific to the <br /> proposed walls must be submitted far review a.nd approval. Multi-level walls spaced less than <br /> double the height of the bottom wall apart shall be considered one wall,and the height shatl be <br /> determined from the base of the bottom wa1]to the top of the upper wall. <br /> 6. The plans should be revised to include cross-section details of the proposed wark to indicate how <br /> walls will be integrated with�riprap at the toe of slope,location of draintile and tie-backs, fill material <br />