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� � Bonestroo,Rosene,Anderlik and Associates,Inc.is an Affi�ma[ive Action,'Equal Opportuniry Employer
<br /> Bonestroo Principals Ot[o G Bones[roo,PE •Joseph C Anderlik,PE •Marvin L Sorvala,PE•
<br /> Richard E Tumer,P.E.• Glenn 2 Cook,P.E.• Thomas E.Noyes.P.E• Robert G.Schunicht,f.E•
<br /> RoseneJerry A Bourdon,PE • Robert W Rosene,PE and Susan M Eberlin,C?A,Senior Consultants
<br /> � Anderlilc & Associate Principals Howard A Sanford,PE • Kei[h A Gordon PE • Robert R Pfefferle,PE •
<br /> Richard W.Foster,P.E.• David O.Loskota,P.E• Robert C Russek,A.I.A.• Mark A.Hanson,RE• �
<br /> Michael T.Rau[mann,P.E.• Ted KField,PE.• Kenne[h P.Anderson,P.E.• Mark R.Rolfs,f'.E•
<br /> Associates Sidney f'Williamson,f?E,LS �Robert F Kotsmith
<br /> Offices:St.Paul,Rochester,Willmar and St Cloud,MN• Mequon,WI
<br /> Engineers & Architects i . F
<br /> ` 1-- � ' - , ' _ ` , ' � � �l�� Yr �!_�,��,L1 �i
<br /> April 4, 1997
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<br /> Mr. Lyle Oman � '"�-=
<br /> Citv of Orono
<br /> P.O. Box 66
<br /> Crystal Bay, MN 55323
<br /> Re: Otto Residence
<br /> BRA File No. 139-2041
<br /> Dear Lyle:
<br /> We have reviewed the grading for the property owned by Phillip Otto, 4116 Highwood Road,
<br /> and have found that the finished grading does not conform to the previously approved plans.
<br /> The previously approved grading plan was submitted in September of 1995. This plan proposed
<br /> only minor filling below the 956 contour (see Exhibit 1). Our initial review concluded that the
<br /> grading plan was acceptable and would have minimal effects on the storage capacity of the pond
<br /> (see attached letter).
<br /> The completed grading plan submitted in October of 1996 shows up to a six-foot depth of
<br /> additional fill below the 956 contour. Also, it appears that the applicant has filled portions of the
<br /> adjoining properties. The increase in fill is distinctly shown near the existing maple tree, which
<br /> has up to five feet of fill placed around it (see Exhibit 2).
<br /> The north half of this lot is part of a storm water ponding area that provides storage for 3.4 acres
<br /> of direct drainage and 16.5 acres of indirect drainage. This ponding area has a history of
<br /> flooding problems due to an inadequate pipe outlet between the pond and Lake Minnetonka.
<br /> Because it is unknown if this outlet pipe will ever be replaced, it is very important �o maintain
<br /> the storage volume of this ponding area. The amount of fill significantly lowers the storage �
<br /> capacity of the pond and would increase the potential of flooding the adjacent homes.
<br /> To alleviate the potential flooding problem, the fill in the low area below the existing 954
<br /> contour must be removed. In addition to the increased fill, it appears that the grading has
<br /> extended beyond the property lines. This fill must also be removed unless the adjoining property
<br /> owner appiies for a separate grading permit and it is approved by the City.
<br /> 2335 West Highway 3G ■ St. f'aul, MN 55113-3898 ■ G12-G3G-4G00 ���
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