02-25-1998 Council Agenda - Laserfiche WebLink

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A year after the program began the excess discharge dropped from 30,000 to 10,000 per day. What about winter discharge? This problem has not yet been fully solved. Currently they are installing 4" perforated tile behind the curb so owners could tie into the storm sewer. They also looked at installing meters on the pumps for annual checking but decided that the cost per meter was too high (about $60.00), and at simply charging for a permit by the month for those who needed to discharge into the sanitary system during the winter (they looked at between $25 to $50 per month). Al Rolik City of Shorewood Approximately 2400 homes inspected. Seven percent of all the homes were found to be not in compliance -- either pumping into the sanitary system or not having a "hard plumb ". The handful of homes that refused inspection are charged an additional $100 per month. The program cost a total of $25,000. Part of the inspection program was financed with a $10,000 grant from the MWCC. These grants are no longer available. Because Shorewood has issues with I & I coming from lake levels and several small unmetered interceptor input and output points it is difficult to ascertain the effectiveness of the sump pump discharge reduction program. However, based on their effort the MWCC agreed to lower their estimates of outflow by a total of $30,000 per year. David Krings Lakeville The City of Lakeville realizes that they have a significant infiltration problem because of a high ground water level and obsolete infrastructure. They have embarked on a $9 million downtown infrastructure storm sewer replacement project. In addition, they have developed building codes similar to Plymouth's that require new construction to hard plump a sump pump line out of new construction, and if there is an upward sloping grade to the back yard, they require a tie in tile to the street storm sewer. For now older residential developments will continue to pump into the system (costing a city of 24,000 about $200,000 per year). In the future they hope to upgrade all city streets to have storm sewer runoff. At that point they will investigate a sump pump inspection program. Charlotte Erickson Minnetrista Minnestrista successfully completed a sump pump inspection program in 1993. For there 600 homes they developed a program where owners had several months to sign -up for the Page 103 Page 10