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REGULAR MEETING OF THE ORONO COUNCIL MARCH 8 , 1982 PAGE -4- <br /> Mayor Van Nest requested Mr . Lynch CITY ENGINEER' S REPORT CON'T. <br /> not to review the I/I Evalution since <br /> the City did not understand the numbers <br /> in the report and the council felt until <br /> the staff and council had a chance to <br /> get some answers as to why the numbers <br /> did not agree with the Comprehensive Plan, <br /> they did not want to discuss this matter. <br /> Mr. Lynch reported on the Navare sewer <br /> problem. <br /> Lift Station #6 was the first item to be <br /> discussed. He stated that the City had <br /> instructed Bonestroo to look into the <br /> possibility of pumping straight from <br /> lift station #7 on up into the gravity <br /> line and on into the interceptor line <br /> located at Livingston Avenue and Shady- <br /> wood Road,bypassing lift #6 entirely, <br /> allowing lift station #6 to accommodate , <br /> additional capacity and additional hook- <br /> ups and also to relieve some of the <br /> problems caused by the water plant <br /> discharge. <br /> Some of the improvements to lift station <br /> #6 have already been made . The pumpinq <br /> capacity has been incr�ase� 90$: Previously <br /> it was only pumpina 200 qal_lcros per minute. <br /> Mr. Lynch stated he had received a letter <br /> from City Administrator Dick Benson and that <br /> Dick had asked that some particular points <br /> be looked � into and they were as follows ; <br /> 1 . WATER PLANT DISCHARGE - It is contributing <br /> quite a bit of water. There are two sources of <br /> water. 'Fhere is filter backwashing and softening <br /> backwashing. The filter backwashing ends up con- <br /> tributing about 1/3 of the total , approximately <br /> 35 , 000 gallons a month. This water could be <br /> stored and recycled. Currently it is all going <br /> into the sanitary sewer. <br /> Filter backwashing is currently done at the water <br /> plant twice a month. The filters consist of 7 cells. <br /> To backwash a cell , water is pumped through it at a <br /> rate of 550 gallons per minute. <br /> Water softening is initiated about 7 times a month <br /> and uses 50 gallons per minute for 3 hours . <br /> 2 . MINNETONKA BEACH-In 1981 Minnetonka Beach pumped <br /> 22 , 000 , 000 gallons of sewage into the interceptor line <br /> on Shadywood Road and of the 22 , 000 ,000 gallons pumped <br /> it is estimated that 4 . 4 million gallons is I/I . (20°) <br />