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Bonestroo <br />Rosene <br />Anderlik & <br />Associates <br />Engineers & Architects <br />September 12. 1993 <br />Cno Cj 9of>e«roo <br />W Rosens PE • <br />C ArxJp'ik Pi <br />M.rviM L P£ <br />£ Turr^' **£ <br />Glenn 8 Cook P£ <br />Thomas E \cve» P£ <br />Pohe't G S<hun<hf Pfc <br />Susjn M Ete^ <• C PA <br />•Sergey Corujitjryt <br />HCW jf'J A Sjoftvrj <»£ <br />icetfh A Gouon P£ <br />Pcoen 8 PvPe»e P£ <br />w fo\re^ PF <br />O Lo^w■^J P£ <br />SOOrn C PuMe* A 1 * <br />Jerry A Bourdon P£ <br />Mark A Hanum PE <br />> Rautmarfr- Pf <br />TeJ K f e^j P£ <br />■•^homas ff Arx)fr«?n A f A <br />Uona»d C BurdanJi PE <br />frvvT'as £ AnguV PE <br />Ismael Md^ ryr/ P£ <br />Vjchae« P Rau PE <br />\^r>es V ^MCP <br />Ph*MO J Pyne Pi <br />T*\yrj\ w Pfrervyi PE <br />M«rr>aet C lynch P£ <br />R VdiaM P£ <br />Je'rv O PE <br />Scott J Argar'ek. PE <br />kermeth P Arjerson P£ <br />Mark P «?oA PE <br />v*art k Seo. P£ <br />Gary '.V Morierr PE <br />OarNkM j Ejgrton P£ <br />A Pck Schm.^ pf <br />Ph.iip J Casvc* ^ P£ <br />Mark O Viai's P£ <br />M.es B }^r\e'} PE <br />t Phiiiio Graver P£ <br />Mien L 'A emen »£ <br />G.»r> D KrtUiyL*. PE <br />F 'uOO *»f <br />kath P >aoo 4. <br />Doogiat J Benevt P£ <br />Shay^n O GuMJf^on Pi <br />Cec io O ve» *»£ <br />Paul G Meue* PE <br />John P Goroef PE <br />Charier A E -s on <br />Leo M Pawvn'«k^ <br />Hjflan M OfV'ri <br />ia'*-s F Engeir.a'Ct <br />ft <br />Ms. Jeanne A. .Mabuslli, <br />Building and Zoning Administrator <br />Citv of Orono « <br />Post Office Box 66 <br />Crystal Bav. Minnesota 5.^323 <br />Re; riirec Star Trucking Subdivision <br />File No. 139-1862 ^ <br />SEP 1 5 ;^993 <br />Dear Jeanne, <br />We have reviewed the preliminaiy plat and grading plan for Tliree Star Trucking located <br />north of Watertown Road in the Southeast Quarter ot the Southeast Quarter of Section <br />33. There are several issues that need to be addressed regarding the grading, drainage, <br />and pond design for the subdivision. <br />Tlie drainage for this property is an important issue due to the fact that much of the <br />runoff currently drains easterly through the developed properties in the Daniels Long <br />Lake Heights Addition. The drainage swale along the east property’ line must be <br />lowered to control the runoff yvithin the subdivision. We recommend extending the 1020 <br />conlour 50 feet to the south and providing a 1021 elevation at the southeast property <br />corner. This allows a 0.5% grade on the ditch while keeping it lower than Lots 12 and <br />13 in the Daniel ’s Long Lake Heights Addition. The ditches along the cul-de-sac and <br />Watertown Road must be set at least 2.5 feet below the proposed centerline street <br />grade. <br />Because the alternate septic site on Le)i 7 is shown at elevatior. 1027, the high w.ater <br />level of the existing pond on Lot 8 should be 1024. An outlet ditch should Ire provided <br />for the pond to set the normal water level at 1023.5. <br />Calculations for the site runoff before and after development should be provided. The <br />proposed culvert sizes and grades should be shown on the plan. The proposed holding <br />pond shown on Lot 4 should be designed with an outlet control to store a 100 year <br />rainfall event with a restricted outflow. Calculations should be provided whicli show the <br />pond volume, high water 'evel and peak flows. The plans should be sent to the <br />Minnehaha Creek Watershed for their approval. <br />'Hie proposed cul-de-Stic is approximately 1000 feet in length which's the maximum <br />2335 West Highway 36 • St. Paul, MN 55113 • 612-636-4600