7A, Motion to Approve 2009 Sanitary Sewer Lining Project to Visu-Sewer

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~ EN HILLS MEMORANDUM DATE: August 4, 2009 TO: Mayor and City Council Ron Moorse, City Administrator FROM: Kristine Giga, Civil Engineer Greg Hoag, Public Works Director SUBJECT: 2009 Sanitary Sewer Lining Project- Bid Award BACKGROUND The majority of the city's sanitary sewer mains were constructed in the late 1950's and early 1960's, utilizing clay tile pipe. Over time the joint materials have failed allowing root intrusion. The pipe is also susceptible to cracking and construction damage. The 2009 Capital Improvement Plan includes funding for a sanitary sewer main lining program to extend the life of our sanitary sewers by 50 years or more. This technology essentially installs a new resin pipe inside the old clay tile sewer main without digging up city streets, which results in minimal disruption to residents during construction. The liner pipe is inserted into the main through existing manholes and cured in place with a heat process. Any given segment is usually completed in one working day. Service line connections are reopened using a robotic cutter and remote cameras. During the process, existing flows are bypassed using pumps. This technology has been proven over the past 20 years, and costs have become competitive with open cut replacement. This technology also prevents infiltration of groundwater into the system and can be credited toward our inflow/ infiltration surcharge. Staff assembled a specification and advertised for bids for approximately 1,100 lineal feet of sewer main lining in areas identified as having root intrusion or infiltration problems. A location map is attached. Bids were opened on July 30, 2009. DISCUSSION Based on past practice, the City Council has awarded contracts to the lowest responsible bidder. In this case the lowest bidder is Visu-Sewer, ofPewaukee, Wisconsin. \ \Metro-inet. us\ardenhills\PR&PW\Engineering\Council_ Actions\2009\8-1 0-09Memo2009SewerLining_ A ward.doc