�' �� �'..: ���.m;� n ��.Y"�+"t � .�y r�-� � �� . '� '� �''�fig4�'��r��' . l:
<br /> . , �� ':�Yk3 Pl xT�'�. � k�9:i��� �F
<br /> . . '`i `-'�''b.'ef'ua"+,i�' ",�.�,+a ��� � �` `�', f ,�.
<br /> �
<br /> Y
<br /> � . . . � f �� Y� � K .� .. Z
<br /> � M. � ^+A. �� �f � :�e
<br /> . J .*fy '�.,b� � � .r.
<br /> .. . ��, � ��' i ,k�� �,�,kv� t,,� :: ' .
<br /> � .. , � �'��4��rr 1�,���3,i r �, '?i�'����'t � i�
<br /> . �. .... _.._....�: i� � .. ��` �'fv+3�,'.,3�'�+i��� . �t`.a.'A �� a ✓^ �i7'� �yt � r t.h
<br /> �, ��� ��.ka� � 3� #'� �e � X' ..._, b.....,..s .... L ti_' - r 'yt� � l:�.r` a4�p.� f���e�.(r �,.
<br /> ;x�.rr.�,� ����'.r'k.5. si y{i.r{�' a�"_',�� '�y` � . . . ,_'v"';Jk�,t,to�i".u.,�s4 F�€21� ty*�'
<br /> , Ps�
<br /> +q:z` ,� t�5'�?',� � '�1,:� � � � ti
<br /> '�'�' '� _������"� � � -� � � �`.
<br /> 4 U
<br /> '`` 'y��� �� . . .
<br /> *c� � •���1, y n .'���
<br /> s. �
<br /> �Y^ � '=a ��'�
<br /> �� � ,�
<br /> �: � � ,; ,��r �� -;. �w� �. wa�3a� �F� �' r �
<br /> =�� � �,���,� �� 1595 Bohn's Point Road ;i�� :, f
<br /> �. •
<br /> p�; -�.��� �� Wayzata, MN 55391 I�.< _ __._�._ __.__,, , �.�,,
<br /> � �
<br /> �k. _����`��� �� �,,��''� ���i - i � �,,.
<br /> �������� � .�
<br /> � F �.�`���;p<� � ��:::� zdt�y i 3, 1989 ���
<br /> w k �4�t �°�S�„1 `C44"�m iil` . .
<br /> ii)a�u�'''°F* '�'`$��'���.�tk �$t§ �' :.r+�'r''- . ���q�
<br /> �. �"
<br /> d"`�3�F�k��,���i``���1�c � 4 9a . .
<br /> �'p;� +„ �„>� �Ra�,r z s�e� A6�S. IC8II[1C �3bUSI�1 ���"-'��' `�•'
<br /> ��a�:�� ��isY������"`�`� i��, City of Orono ��','�.
<br /> z;, ,�
<br /> ��# �' �� �;,�.���,��, ��.,;
<br /> �' ��� � � ,� Re: Our mceting of May I1, 1989 concernang the culven elevati^�.
<br /> .� �f 3 f 9i•� f
<br /> .2. �'f����a"�y+�'.��"�*�t'���r. - . ...
<br /> a�r r���r�F �$a"�C�� ,� �:.
<br /> x ' .+`.4 Y �C 'Y � k,'�S �� . .
<br /> ��� ������ �3 .. .. ' ��
<br /> �x -��S�s d t�- �, ;�����{��� Dcar Pv4s. Ivlabusth:
<br /> �����a�������� �� ���oM����
<br /> ��ir;
<br /> �� �_ ,� . �►s a resuit of our meetin at the
<br /> � �� r, S pond on Bohn's Point Road on Msy I1,
<br /> ��� � � � � 1989, I woutd likc to summarize our position and proposal regard;mg the
<br /> '��`�.���>����;����'��: . wae�rshed flow and the elevation of the l2 inch culvert underneam� the
<br /> �``'��'�' ` �` ' E �' r�ad• On A�ia 1 (pond side) of the cuivert was 929.12
<br /> �,�, � �,,,,,� 3 •'�� a,;� Y 0, 1989 the west end
<br /> ����� '��.;�r�w �.,� t �,.� �d the east end (dCovacevich side) dvas 929.44, goin g i n t o t h e w a€�,r s 6 e d 1 h
<br /> �`;� ' ' Yd �f� � �, drainage sw a le leadin� to Lake Minnetonka. T he survey of elevati�r�s was � ''' °
<br /> ,r"�.�r Y�? ,_ N �� ` , �� done by Cof4in & Gronberg. Prior to Mr. Kovacevich raising the c�a��re�t in
<br /> ������.�, t rS � � h� �a _ ch� fall of 1987, thr elevations were West 928.6 and east - 928.0.
<br /> a�G��.��`��`�.����%���g � Po
<br /> ; ,, IZ decidin our sition in tfi�e sumrr.er of 1987 on how much to ra3s�e the
<br /> �z rq�"�'`��rr � , �� a,�� culvert, we had a topographical surve of our ro rt
<br /> � y P Pe Y PrePared. '�'i�is
<br /> �;"�` s�* ,�`�t� ����wh��' included location of the major trees, as we were particularly conce�ed , �t
<br /> �
<br /> ����" �,p:� `��� ;� �"��� � about the large willows around the pond. �This was the sarve
<br /> y you �nd
<br /> F', �,i�, , , ��, Jobn Ger6ardson saw at 'our meeting. After lengthy discussion and
<br /> :,r�'
<br /> `�"r�;!,�,,�a; r �� AY " a 2�*` anadysis, it �v�s decided with Dale Gustafson that the maximum we,: i nvert
<br /> , � ' ��""'�-'r'�'��ar"��ar����p elevation should be 930.0 fcet with slope west to east. This was '�
<br /> �y�� �� � ��������������� � . . .
<br /> a ����,��,�� � � �,_� , . i�corporated into Orono s letter to F!'r. Kovacevich dated November �',
<br /> �
<br /> ��'� � ,, � 1987, which required slope of one- larter inch per foot of culvert. � �
<br /> ��'���"���{�..���N ` �� : 9.
<br /> # �
<br /> 'ryt�� "�}''��r�� '� In arriving at the west maximum elevation of 930.0, the following wtre ` �
<br /> > r ,
<br /> Y
<br /> �'��A f �'�`` ; ' �.,w� the key factors: -°
<br /> a,�. <�r�� �
<br /> 'S ��i� Y+� a;�;�
<br /> �
<br /> ;f ¢ �,.:;.� �r`; �.� . � 1. Several large willows are at 930.0, as you have seen. To g��ce; che
<br /> ` � '� .� `t " west invert higher than 930.0 would mean the roots would be total9�
<br /> t � � ` ,��"� ,,� suberaerged an unacceptable paat of the time, which would kill them. �:,
<br /> �,��:� ��'`���`�����
<br /> �
<br /> �� ,��;,�,�",�� � � 2• Raising the evest invert above 930.0 would materially teda�e tho ''
<br /> �����.,�C�,��d�.�.���� '°, "Possc�ic��" or overflow eapacity of the watershed area. Due to the veay
<br /> �
<br /> 1�' ��x t�,r;��,���,��� �;rad�a�9 sDope oY' the pond's b�nks, � cQ�siderably larger area would �fsen �
<br /> /'� rx�.;,�;� .
<br /> r��� ti ��`* i �
<br /> v��+;�`�3<� ��;; �+"�- � �
<br /> 7 �'� <� ,yai ,y ei�t,,�.� , � .. .
<br /> �+ r a
<br /> r a,�i rrt_.�i a�.�`�'� . . .�.���. �i
<br /> � F x
<br /> . a". � ,.
<br /> .. ...: _.,.,.�,�-,„,- .. ''r
<br /> � _ � ' — , . — .,�.,,..�_.__,,. .._._ �, �, � �,�
<br /> �
<br /> � ` x�����,�
<br /> • � . � . . ,,"w '�''L �'�a,r'��<� �Sz� � ��.
<br /> . �.wY'��, n f�, ��. �I
<br /> � � t�" +�s���y F r���"��zt .�.1`e y
<br /> . � . i, F+'j#��^�dl;S.#" � @
<br /> . . )43 �'" e.�d Mi- -
<br /> . . . . . . r{ � k �,��aV'� �.
<br /> h,t �'
<br /> . . ���h r�#i.
<br /> �..j ��(�y�
<br /> � ., � . . . . ' . ,. F1 '.•���{{���'N�N47'.b�'.'r�t �. p.
<br /> . s�.� �� ���1 X��� � Yr
<br /> � k� 3
<br /> . . _ . . 4 �'i �p , Z
<br /> ��ty�{�„��'.'F� '. � ' t`!
<br /> .. . . .', r f ,' � r 9.��r�� � � ' t ,. .
<br /> . 1' ry � �..F��<*a��� ,�',��"'i����1 .3� '��� W `.'i...
<br /> ` __` .1 d,,�'� *c�tap f,� �y � ,�kY, � l
<br /> . u,.a } v{��.! •-' i a.'g r ���''.�.�" . �I �'�c H r.�!k��.�r ��,
<br /> �)�.{�N x�n...v... . � . . .. . � i .. n,. ... � i�l� ` .. . Es" . t. �^.b ,7 YSy .�[i�� o ti �yi �a�r
<br />
|