Laserfiche WebLink
• <br /> c ," -ti, BOLTON & MSN K , INC® <br /> �� ConsultingEngineers & Surveyors <br /> m1 ,z 9 Y <br /> 2638 Shadow Lane,Suite 200•Chaska,MN 55318-1172 <br /> \ Phone(952)448-8838•Fax(952)448-8805 <br /> www.bolton-menk.com <br /> February 26,2016 <br /> City of Orono <br /> Attn: Christine Mattson <br /> 2750 Kelley Parkway <br /> Orono,MN 55356 <br /> RE: Building Permit 2016-00117 <br /> 470 Orchard Park Road <br /> Engineering Review#1 <br /> Dear Christine: <br /> As requested,we have completed an engineering review of the documents submitted for the above <br /> referenced project. We offer the following comments for your consideration: <br /> 1. Perimeter erosion control measures (i.e. siltfence,rock entrance)and protection fencing around <br /> septic sites should be installed by the Contractor and inspected by the City prior to any other work. <br /> Contractor must provide minimum 24 hour notice prior to inspection. <br /> 2. Work in public right-of-way should be coordinated with the City. Contractor should provide <br /> minimum 24 hour notice prior to work. <br /> 3. Rain gardens and infiltration trenches should not be installed until upstream areas are permanently <br /> stabilized. <br /> 4. Biolog ditch checks should be installed on the swale south of the proposed house leading to rain <br /> garden#1 after grading is complete. <br /> 5. Erosion control blanket should be installed on 3:1 slopes after grading is complete. <br /> 6. Turf reinforcement mat should be installed on rain garden weir outlets after rain gardens are <br /> constructed. <br /> 7. Riprap should be installed on the downstream end of the proposed culvert on the northwest corner <br /> of the large wetland. <br /> 8. Trashguards should be installed on all storm sewer aprons. <br /> 9. Proposed HDPE culverts draining to rain garden#2 under the proposed driveway should be <br /> installed as RCP. Lack of cover may result in crushing of HDPE pipe, and fluctuating water levels <br /> in the rain garden may result in floating of the HDPE pipe ends. <br /> Please let me know if you have any questions or need additional information. <br /> Sincerely, <br /> BOLTON&MENK, INC. <br /> i .(3-64tg 64 <br /> Robert E. Bean, Jr., P.E. <br /> Water Resources Engineer <br />