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� <br />EN HILLS <br />MEMORANDUM <br />DATE: Marc� 28, 2010 <br />T4: Honorable Mayor and City Councilmembers <br />Patrick Klaers, City Ad�ninistra#or � <br />� <br />FROM: Terry Maurer, Public Works D�rector� <br />SUBJECT: Lift Station Rehabilitation <br />Back�round <br />The City's sanitary sew�r system has 14 lift statians. Of these, all but four have been <br />rehabi�ztated. The 2011 Capital Improve�nent Plan (CIP) has $385,000 program_med �or <br />ihe xeconstruction of Lift Stations 11 and 13 (attach�d is the CIP sheet). Lift Station 11 is <br />located at 1861 Hwy 96 (adjacent ta Ard�n Manor) and may be af�ected by the <br />construction of the TH 10/Hwy 96 Interchange. Therefare, it is recozx�zx�ended that <br />reconstruction of this lift station be delayed until the impact o�the interchar�ge project is <br />known. Lift Station 13 is located at ll23 Karth Lake Drive {near the iniersection of <br />Karth Lak� Drrve and Pleasant Drive). <br />In addition to the reconstr�ction of Lift Station 13, there axe two lift stations that ha�e <br />been experienci�g operatianal �roblems �or sonne tizne. These are Lift Station 5 located <br />at 3495 Lake Johanna Road az�d Lift Station 8 Iocaied at 1335 Ingerson Road. Both of <br />thes� lift stations have been experiencing similar operational problerrFs ihat cause the <br />pump to move away frorz� the base elbow allowing "blowby" affecting the operation of <br />ihe �ift station. Also, numerous times the pumps have actually tipped over w�ile away <br />from the base elbow requiring the Public Works crew to reset the puxz�p on the base <br />elbow. Staff is r�commending that Lift Staiions 5 and 8 have their operational problems <br />diagnased and repaired in 20 � 1. <br />Lift �tation 13 was originally built in 1978. It is a wet well/dry well siyle meaning <br />sewage flaws into a"wet" struct�re and is purnped out by purx�ps k�oused iz� a separate <br />"dry" siructure. The lift staiian and equXpme�nt are now 34 years old. Most of the <br />ec�uipment is obsolete which makes it very di�ficult ta find replacement parts when there <br />is a problem. The contral pane� cozx�.pletely fazled about six years ago and a te�nporary <br />replacerr�ent panel was instalIed untit the station could be rebuilt. The original desigr� for <br />P:IAclminlCauncillAgendas & Packet InforAnation1201113-28-11 RegularlPacket Inforn�ation <br />Page 1 of 2 <br />