2012-09-25_PWETC_Minutes - Laserfiche WebLink

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Mr. Schwartz advised that both different approaches were being considered; and noted that 3M had shown great interest in partnering with the City to introduce this product in Minnesota. Mr. Schwartz noted that 3M had seen the product used successfully in Europe and Canada, and an initial project in the NE portion of the country several years ago. Mr. Schwartz advised that staff had been in discussions with 3M on their process for several years; and that they had two (2) national contractors who also work locally and partner with 3M, who are looking to bid on the Roseville project with the 3M product as well as the CIPP process. Mr. Schwartz advised that staff was seeking feedback from the PWETC on potential use of either process and potential cost-savings for pipe bypassing. Since pipe bypassing required the bypass pipe to be located above ground, Mr. Schwartz noted that bacteria issues in that piping could be of concern during warmer months, but given the timing of the project, he didn't see that concern this fall. Mr. Schwartz noted that the interest in either process is due to potential cost- savings, with bids seeking by-pass piping as an alternate for one of the segments. Ms. Giga noted that the segment for this alternate was on Transit Avenue; however, on the segment along Rice Street with four (4) apartment buildings potentially affected, staff felt it would be too difficult to notice all residents about the water. Mr. Schwartz reiterated that, if the project was awarded without the bypass, the City should supply bottled water throughout the duration until boil test water reports are returned safe for consumption. Member DeBenedet opined that the City should be liberal in furnishing bottled water to avoid any issues on safety and/or taste. While never having tasted water from lined pipes, Member DeBenedet noted that he had smelled the process during the Metropolitan Council's Environmental Services (MCES) sewer interceptor line process, and the smell had been quite strong during that process. At the request of Chair Vanderwall, Member DeBenedet, based on his research during his Cap Stone project, advised that while staff had consulted with other communities about their experience using these processes, few communities had used the process to-date for water lines as it had been a much more expensive process than lining sanitary sewer lines. At the request of Chair Vanderwall, Mr. Schwartz addressed reconstruction of Rice Street in the future and whether open cut water main replacements would be more cost effective than the lining. Mr. Schwartz noted that the City had open cut water main replacements as a part of this year's Pavement Management Program (PMP); and advised that the cost depended on how much other utility work and other components of the project were being done in conjunction, all impacting the cost. Mr. Schwartz advised that staff thought this year's project at $100/foot Page 5 of 13