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i "4 1/ J Bonestroo ^=jg Rosene ^■| Anderlik & I Associates Engineers & Architects August 14, 2000 Bonetiroo. #s«*ne. AnierliM »nd AiiocUiet, Ir.e. 1$ jn Af.••?r-.a:ive Acuon/EqujI OppoMunlly Employer arC Employee Owned Principjili: C::3 G Borest'co. P.£ • MAfvin L Sc*.*.'. Pt •Ce--'? CooV PE • Robert G Sc--r cht. P.£ • Jerry A. Bourdon. P£ Senior Consu^tanti: Rcber: W Rosene. P£ • Jeier** C Ande* =»£ • Ricriard £ Turner. P£ • Susan W ECf CPA. Associate Principals: Heward A. Sanford. PE • tn A. Go^rc-. PS. • Robert R. Pfcfferle. P.£ • Richard W fsirer. PE. • David O. Loskota. PF. • Rcre*: C. Rus:e«. A.I A. • Mark A Hanson. P£. • Michael T. Ra.:--ann. P£ • Ted K Field. P£. • Ker.-i:- » Ance*;: -. .^£ • Mark R Rolfs. P£ • David A B:.-f::roo. M B •* • S dney P Wiiiiarrsc*.-£ LS • A;*es V Rmg. .MB A. • Allan Rick Schoid:. P£ Offices: St ?i-i. St. CicuS Rochester and Wuii-a* v.N • Mil Wi U/kbilte: n A .vsonestrce com Mr. Paul Weinberger Zoning Administrator/Planner City of Orono Post Office Box 66 Crystal Bay. MN 55323 Re:Van Eeckhout Subdivision File No. 139-2550 Dear Paul: We have reviewed the revised preliminary plat for the proposed seven lot Van Eeckhout subdivision. The site is located cast of South Brown Road, south of Long Lake and noruh of the Luce Line trail in th* northeast quarter of Section 3. We have the following comments in regards to engineering matters. 1.Access/Streets: Theproposedaccesstothesiteis via Apple Glen Road in the City of Long Lake. Apple Glen Road is accessed off of Watertown Road. The total length of the cul-de-sac from Watertown Road is approximately 1600 feet where City code allows a maximum cul-de-sac length of ICKX) feet. Plans should be subtilised to the City of Long Lake for their review and comment. The proposed typical street section shows 24 feet of pa ’ed w'idth with no shoulders. We recommend that the street section be revised to include 3-foot gravel she '«rs as required by City standards. The s’a'eet section should provide for a mini-um of 8-inches of Class 5 aggrep.-tc base and geotextile stabilization fabric if necessary. We recommend 1 Vi inches of Type 41 bituminous wear course and 2 inches of T\pe 31 bituminous base course. A geotechnical evaluation and R- value recommendation should be provided to verify the street design. 2.Grading: The grading and erosion control p'.a.n should include erosion cor.u'ol measures to protect the existing wetland. The erosion con.rol plan may need to incorporate bale checks a.id fiber blanket in the ditches and along Sleeper slopes. A wetland mitigation pla.n should be implemented for any wetland filling. Erosion conurol measures should be in place prior to any grauir.g, particularly along the wetland. Addiuonal erosion control will be needed during construction of the houses. 3.Drainage: The draft version of the City’s* Comprehensive Storm Water Ma,Tigemcr.t Plan (SWMP) shows that the site lies within the TanagerLoke drainage district. Long Lake Creek, a Mn DNR protected waterway, flows through the site. Plans should be submitted to the Mn DNR and the Minnehaha Creek Watershed District (MCWD) for review and approval. Proposed ponds should meet NURP standards. .All proposed ponds should specify normal water level (NWl.) aiid high water levels (HWL). The final plans should include final pona grading including a 10:1 aquatic bench 10-fee: wide at the pond NWL. The pond design should also include an outlet structure that provides l-fooi of skinuning to remove floatables and debris. Skimming should be provided to the pond HWL. Storm sewer design including outlet structure details should be provided for review. Best Management Practices (BMP’s) should be implemented on all areas where stoma water cannot be routed direciiy to a pond. A drainage area map, sterm sewer and ponding calculations should be provided with the fr.iai plan set. 4.Sanitary Sewer: The City of Long Lake should be consulted regarding prop ased connections to their sanitary sewer system. A written sewer agreement between the Cities of Long Lake and Orono will be required. The developer should provide detailed sanitaiy sewer design including plan a.''d profile sheets. The Civy of Orono should review the sanitary sewer needs along South Brown Road (existing home west of Lot I, Block 2) and determine whether the sewer should be exte.'.ded to the westerly boundarv of Outlet A. 5.Easements: Drainage and utility easements should be provided 5 feet wide along all interior lot lines and 10 feet wide along the roadway right-of -ways. Drair ..ge easements should be provided across all wetland, drainage way and pond areas. 2335 West Highway 36 • St. Paul. MN 55113 • 65»-636-4600 • Fax: 651-636*1311 J