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J U L - 1 e, �;5 �M Q�yb rK bHt�l��'t f�ER I NG N E 612 832 2601 TO 94736696 � L �P 02i02 � � � <br /> � ' ' <br /> �� • , . ••. . <br /> .�r ��N��,�� s���,s� <br /> �.���� f�,��.,ozs ���vzxsa'� <br /> July 10, 2995 �t�762� <br /> • ��� ����� <br /> ��a.t. <br /> Mr. Jve Of#e�man ' ' <br /> 1669 N. Farm Roacl " <br /> Long �.ake,IVIlV 55356 . . <br /> ' � R�: Plood X,e�rel of Poxtd . . � ��,,, ��Q <br /> �— <br /> Dea�r M�c. OKe� � T ,�, . �C_S <br /> • • � <br /> 4Ve��ave reva�wed tFie infornnx�� y�,�� �e Pesek has subn�ttecl�as well as information <br /> collected by Ricic Lv�tina of our firm durtng his vieit to youx propexty i,�.st week. The <br /> pu:pose o#our rev�ew was Eo eshmate the 100-year fiood levet in ozdex to set znininte,m � <br />_ bt�ilding elevations on the adiacent property. <br /> 'I�e pond has a very ame,]1 tr;butary area and would be expected to ha�ve a very szz�all flood . <br /> 'x'cx�ease. If we aseuaze that the culvert is open and �un�t;onal, the 100-year Elood level <br /> would be O.y feet above the pip� irtvert or approximateay 987.4, �3owever, it i� beconn;ng <br /> standard pYaedce ln �04� cozttrol to avoid zelying upon a single etrlv�r�, unless it is � azajor <br /> s�ructure w4th a defined ma.iz�tenarice.program. When Ntr, Lestiz�a mado his �nspectiQn, the <br /> c+xlvert w�s comple{eiy plugged with seciimertt at the upstream end. Grou�ndwater inflow <br /> �nd long-cerm tunof#could ralse the level of the pond sigxtificand� above 987,4 if the pipe is <br /> �lugged. Mr, Gaffron of the Ctty of Qrono stnted that he would prefer that the �unz,mu� <br /> uilcii.ng ele�ve�bion be above the rurtout leve! since stardazd maintenaztce ro <br /> 6uarastt�eee that the �ulvert wilI atwa�s be kept open. p Ce�� c�oE • <br /> Based on this tztformaHoz�, T would snggest that the minimttm building elevafion be set three <br /> lnches above the rt,riout elevabion over Lo�ng Lake Koad <br /> . Basecl on Che topo�np�c map thi9 would be $leva�on 991.5. Because of the accurary <br /> limikatione of the tapographic maps, �would have the buflder refexence the actual mi�m,,im, <br /> bullding e]evation to,the ovesflow poitlt of the ro�d'�when constxuction begins. I should also <br /> note that� secvnd overflow rout,e e,oists fxam the pond ta the eonth, toward the cul-de-eac of <br /> ''"' Faxm Road. If the Long T,ake Road overflow fs t�oo hig�, the overIlow to the south m{ght be <br /> excavatied to produce another, lower ove�rflow �oute. . <br /> I hope chis information wl1l help avoid any flood dar�nage in youx neighborhood. rlease <br /> • conta�t�g y�� �y questions, <br /> '- Sin�Y � . . <br /> � , • , <br /> ' Nels P.NeIson,P.�,: � .� <br /> � � TOTAL PAGE.02 � <br /> /1� — - <br />