02-16-1988 Planning Packet - Laserfiche WebLink

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-H ^' JCouncil Chaabors on tho matter ofeeka a conditional rental# caretakerulevard seeks a of a non-rental# eeks approval of such as a detached .ly scheduled for lance application. lon/City of Orono required setback and expanding the re area. , 40 on Big Island# le required setback dwelling. time. The meeting Lans are available onlng Adinihi s t r a tor ■y:-:M■:w mm ; ., V vT ■■■ ■ '■-■■■■'. '-'■% : §:-y wm'SieMtmm .1 5-..'.■ ^ m;m- 4 '• :a-^ jsv:’^« ‘te.ptj -mmmf--. ■; .y .F mm iilii r^umm ■'•■riifeiim:/;n>vv« •;# 1 itisBrns* mm. ■-,...• ■. ••%• >: ’ • mmm •='i' mmm ■■■mm i M iiSiP mm Ia ■■^; IviJ- mi:. :> ' ■''■J't ’■: V '^-IjK^.r.. V-:.;JSm'' '■'■ ••■- ■^' ■■■‘/■v, ■ ’•;’''.''2.^ScJIillMnR'.VI''-S-iMAS smyj Ky.-'y i?AA: T^V’-’ '-v': ••■'• ■’.. , , - |^>’i<v ‘0 m -■M Ki m^-wm 5.^ m ■mm % wmm: • 3&**rA? ■•-' m ■ W-■0.y-:-. ■'- ;■■ ’>Tyty- - -7^■; .V*.•; .• i J.- ;•■■.•■■■"• ■:••.• ' - A.-5--5;•■•• V." ir :GcityOFORONOGlTYof ORONOPort Oflicg B— WCtytol Bay, MiniieMU 55323 •Mvnid|Ml 081cmOn the North Shore of Lake Minnetonko January 19# 1988Robert Posthumus 24200 Hatches Lakeville# MR 55044 Res Lots 58 and 59# Morse Island Park - Septic Concerns Dear Mr. Posthumuss I have further reviewed the site plan and septic system design for the property on Big Island. In addition# I have discussed various concerns about the system design and layout with Dr. Roger Machmeler of the University of Minnesota Agricultural Extension Service. Dr. Machmeier is a nationally recognised authority on septic systems and is likely the most knowledgable individual in the State of Minnesota regarding the desljn of such systems for residential usage. Based on his comments and a further review of the pertinent ordinances# I would make the following comments and determinations: 1. The proposed design is not acceptable as-is because the rock beds are skewed in relation to the contours and therefore the assumptions used in creating that configuration are not valid. Mr. Parker used a literal interpretation of the codes to create this design but it does not in my opinion fit within the design perameters generally accepted within the industry. 2. If this system had been located in the portion of the property containing a percolation test# and if that percolation test had r<?uivalent to pare test #5 at 11 minutes per inch# the basal width pu- endlcular to the contour lines would be defined as approximately 25' with an additioral downslope area of 12' required in addition to the approximately 20' downhill area required to maintain the necessary 4:1 slope for maintenance purposes. That would have put the ultimate boundaries of the system outside of your property boundaries. 3. Given that it was determined that the proposed system would not be acceptable# I then layed out the necessary constraining setbacks for this property to determine if there was any chance that the property could contain a well# a residence structure and a primary and alternate drainfield site# given the need for mound systems due to a seasonal perched water table. The limiting criteria are as follows: a) For the structure# setbacks on this lot are 75' from the lake# 30' from either side and 30' from the rear lot line. BUILDING a ZONING - 473-73S7 ASSESSING ADMINISTRATION A FINANCE - 473-73SB PUBLIC WORKS - 473-7359 mmm,.it:5':vw= :?■■■. .}■■msm:. m■ -I . . :-•= •• •-i.,,.: •. v; .7' . m-:- fmsm mwmmm mr : - '-a Safe. ■ ■ 1 -''it '-y ■:■'■- -'yi- V.: v .A-!::=k;:7 mm: IJp-Ar ® mm \:':y'myyymm mimm Rliiiiilfammrnmmm ""' mmmm,msm ■i :I. f' 4 . ‘ial Mm A:,.. ■ V;7;'-A A A.7-:i ■ ja-. ■ m. i' I;'’ K#' . .7: