05-18-1998 Planning Packet - Laserfiche WebLink

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1/1 Bonestroo Rosene ^5 Anderlik & Associates Engineers & Architects :-orcitroo Po\^nv AndvrUk i^nd Aiioci Inc /s A. j rcr ■? I't Acttor Ecju.U (Jpcortunity £mplc 'cr Pnnctp-^ls Otto G Bnnestroo. PC • Joseph C Anderlik, PE • V.*rvin L Sorv.ilcV PC • pichcifcl E Turner P». • Glenn R Cook PE • Robert G Scrun»(.nt ^E • Jerry A Bourdon. PE • Robert W Pcsene PE ^nd Sui.rn M Eberlin, C PA Senior Con-,.ult.'nii Ajsoc/4rft* Prin-i pt^li Ho*v *rd A S.snford. PE • Keith A Gordon. PF • Robert R Pfefferle, PE • Rich;srd W Foster. PE • Oervid O LOSKOM. PE • Robert C A • Mtirk A H«<nson. PE • Mich,^ei T ^sutmann PE • Ted K Field PE • Kenneth P Anderson. PE • Mt^rk R Poits, PE • Sidney P Wili^mson. **E L S • Robert F Ko T^itn Cffices St '■^uf Rochester. Wuim.ir ^ind St Cloud MM • Mii.v^uk-e VII May II. 1998 Mr. Michael P. GaflVon Senior Planning tr^wrdinator City of Grono Post Offiee Bo.x 6(r Crystal Bay. MX ‘55323 1 Rc;Barry Hapiund Subdivision NJo I Dear Mike: We have reviewed the preliminary plat for the proposed two lot Haglund subdivision. The site is located west of North Arm Lane and north of North Arm Drive in the northwest quarter of Section 6. We have the following comments in regards to engineering matters. 1. Access: North Arm Lane provides ihe existing access to the site. The roadway is a publicly maintained dead end pnva»e '••.leet, 18 lo 20 feet wide, approximately 1100 feet long and potentially serving 7 to 8 prcpeftie.s. Tiic .‘southerly end of the roadway is paved from North Ann Drive to approximately 300 feet noith. the remaining ; ‘ngth is gravel. The majority of North Arm Lane lies east of the subject property wr.b.ut an exif’.ing r.gi •. ot-way that varies in width from 33 to 50 feet. The south end of North Arm Lane ennoaches e-ibieily onto Lot 2, Block 1. North Arm Estates and southerly onto R.L.S. No. 924. North Arm Lane shoulu be reconstructed to a minimum paved width of 28 feet to meet current City standards for a private street serving 3 to iO units. A cul-ae-sac should be constructed at the north end of Lot 1 to provide room for emergency vehicle turning movements. We recommend that the southerly end of North Arm Lane be realigned so the roadway does not encroach on neighboring properties. The intersection of North Arm Drive and North Arm Lane should be realigned to be as close to perpendicular as possible. An additional 8.5 feet of right-of-way should be acquired along the east side of Lots 1 and 2. Right-of- way should also be acquired to allow for cul-de-sac construction on the north end and the intersection realignment on die so'jii' end. <ar.d spcciricatlcns for North Arm Uane improvements should be piovided foi leview. 2. Gratli :g: A grading and erosion control plan for the entire site should be submitted for review. Erosion co.U ’.o! measures sliould be in place prior to any grading, particularly along the east and north property lines of Lc- i. Additional e. F.^ n control will be needed during construction of the house and septic system. 3. Drainage: Tlie draft vereicn ot the City ’s’ Comprehensive Storm Water Management Plan (SWMP) shows that the site drains eMierly to an existing wetland identified as NA-P2. The SWMP has classified NA-P2 as a morteratply susceptible v''etland. Phosphorous loadings leaving the site should be limited to a maximum of 0.28 pburid^acre/ycar. We also recommend that a ponding area be constructed to provide water quality, rate* contrbi dnd nutrient rem.oval of storm water leaving the site. An existing depression in the southeast comer of Lot I may provide a natural location for such a pond. A majority of the site eui.-enfiy dmrii.s lo Mie depression and then easterly through an existing culvert under North Arm Lane. A -Jiainavc u:ea mnp and ponding calculations should be provided with the final plan set. 2335 West Highway 36 - St. Paul, MN 55113 ■ 612-636-4600 - Fax: 612-636-1311