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_ _ <br />� ;�: <br />o,; <br />�: <br />� � <br />Q <br />' �: � <br />�,� ���;:,. <br />��� . <br />BC] I.�TC�N $� M� N K, <br />�or�suEtin� E�gin�ers & Sur��yor� <br />12224 NicatletA�enue • Burns�i9le, MN b5337 <br />Phone (952) 890-0509 • Fax {952) 890-8�65 <br />www. bo[tan-rrtenk. cam <br />� NC� <br />March 23, 20 � 1 <br />Ter�y Maurer, P.E. <br />Public Works Director <br />City of Arden Hilts <br />i 245 West Highway 96 <br />�rden HiIls, MN SS l 12-5743 <br />RE: Pz'oposal for Professional Engineering Services <br />Lift Station Improvements <br />City of Arden Hills, Minnesota <br />Dear Mr. Maurer: <br />I appreciate the opportunity to assist the City of Arden Hills with their Iift station projects, <br />specifically lift stations 5, 8 and l3. Based on our discussiQns, we understand that Iift stations 5 <br />and S have existing pumps that tip and rxzove away frorka the base elbow creati�g blow by and <br />affecting the performance of the pump and ultimately the lift station. The pumps in bati� of these <br />stations were installed by Braun Pump and Control which is a company no tonger in business. <br />Based on discussions with you and your staff the problems with these pumps started when the <br />new base elbows were installed in �hese stations. Lift statian I3 is an existing lift stati�n locatec3 <br />at 1123 Karth Lake Drive and was part of the 2006 Sanitary Sewer Rehabilitation Project and <br />this station was never rehabilitated. The existing station is scheduIed to be removed and replaced <br />with a new wet weli, valve vault, pumps and accessories, and contro�s. <br />The City of Arden Hills is requesting the services of Bolton & Menk, Inc. to corr�plete finaI <br />design and eng�neer�ng for repairs to Iift statio�s 5 and 8 and replacement of iift station 13. The <br />fallawing detai�s our proposed scope of vvork and fees to cotnpiete this work: <br />SCOP� QF WORK <br />Lift Stations 5 and S <br />In order to determine the best course of action to 3�r�ng these stations into proper aperation we <br />propose to conduct site visits to both stations_ During the site visits we will want your <br />operations staff to be present so they can operate the pumps in ha�d and pump the station down <br />to a low level so we ean observe the pur�ps while operating and visua�ly observe the issues with <br />the pumps. We will also coordinate this site �isit with one or more p�mp s�pptiers so they ean <br />also witness the issues with the stations a�d they rnay be able to suggest potential solutions. <br />Depending on the outcorr�e of the site visit and further i�vestigation after the site visit, the fix for <br />these stations may require a relatively simp3e and cost effective optian or it may require full <br />�'eplacement of pvmps, base eIbpws, guide rails, etc. If the �ix for t�e stations is relatively �ninor <br />in nature and can be dane cast effectively by �irectly hiring a contractor/purnp supp�ier to <br />tJ�SiGN1NG FOR ,4 B�IT�R TQMOf��DW <br />Bolton � Menk is an equ�EI opponunity esnp3oyer <br />