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3. Update on Chan Hills Sewer Backupr ,• w MEMORANDUM TO: Mayor and City Council CITY OF FROM: Todd Gerhardt, City Manager CHANNSEN DATE: March 28, 2011 7700 Market Boulevard SUBJ: Chanhassen Hills Watermain Break/Sanitary Sewer Backup PO Box 147 Chanhassen, MN 55317 BACKGROUND Administration On Wednesday, February 23, 2011, a watermain broke at the intersection of Barbara Phone: 952.227.1100 Court and Chanhassen Hills Drive North. Staff believes that movement of subgrade Fax: 952.227.1110 soils put undue pressure on this 12 -inch pipe, which ultimately caused it to crack. The Building Inspections watermain is pressurized and, based on staff's estimate, approximately 1,500 gallons Phone: 952.227.1180 of water per minute was forced into a nearby 8 -inch sanitary sewer pipe, eventually Fax: 952.227.1190 backing up into 27 homes. Engineering Two different internal adjusters from Travelers (the city's insurance carrier) reviewed Phone: 952.227.1160 the damage and concluded that the city was not negligent and therefore denied the Fax: 952.227.1170 property damage claims. Travelers does not offer a no fault policy for this type of Finance occurrence. Phone 952.227.1140 city if the damaged homes are not properly cleaned. Based on these public health Fax: 952.227.1110 ANALYSIS Park & Recreation Staff believes that this watermain break and sewer backup was a unique event. The Phone: 952.227.1120 frost in the ground forced the water from the break to follow the path of least Fax: 952.2221110 resistance to a sanitary manhole, ultimately causing the sewer backup into 27 homes. Recreation Center Staff also believes there could be a potential public health and safety hazard to the 2310 Coulter Boulevard city if the damaged homes are not properly cleaned. Based on these public health Phone: 952.2271400 concerns, I recommend that the city reimburse all 27 homeowners $2,500 for a Fax: 952.227.1404 portion of the cleanup and sanitation of their homes, in exchange for a full and final release from the claim from each homeowner. The city attorney has advised me that Planning & Natural Resources this recommendation meets the public purpose test especially as it involves P p � � p y public p Phone: 952.227.1130 health. The recommended amount is based on providing assistance to homeowners in Fax: 952.227.1110 cleaning up their basements and is equal to a payment made to a property owner affected by a flooded basement in 2010. Public Works 7901 Park Place RECOMMENDATION Phone: 952.227.1300 Fax: 952.227.1310 It is recommended that the city council approve a $2,500 reimbursement to the Senior Center homeowners affected by the February 23, 2011 watermain break and sanitary sewer Phone: 952.2271125 backup, provided the property owners sign a full and final release from the claim. Fax: 952.227.1110 ATTACHMENTS Web Site www.ci.chanhassen.mn.us I. Sewer Backup History 2. Affected Homeowners List g:Aadmm \tg \chanhassen hills water main break 2-23-11 \ec memo 03 -28 -201 I .doc Chanhassen is a Community for Life - Providing for Today and Planning (or Tomorrow SEWER BACKUP HISTORY 2002 THRU 2011 8628 Chanhassen Hills Drive South 38 -076 Watermain Break February 23, 2011 27 1240 Lake Susan Hills Drive 34 -078 Infiltration /Inflow Mincral Deposits Fall 2010 7 801 Lake Susan Hills Drive 34 -088 Settled Pipe June 2010 1 7951 Market Boulevard 29 -017 Grease Stoppage May 2010 1 1240 Lake Susan Hills Drive 34 -078 Infiltration /Inflow Mineral Deposits April 2010 1 419 Summerfield Drive 42 -061 Settled Pipe 2003 1 99 Lake Drive East 29 -121 Grease Stoppage 2002 2 g:Aadmin \tg \chanhassen hills water main break 2 -23 -1 I \sewer backup history.doc Resident List for Chanhassen Hills Watermain Break on February 23, 2011 First Name Last Name Address City State Zip Terri Berg 8616 Chanhassen Hills Dr. S. Chanhassen, MN 55317 Jen & Tom Bowman 8577 Chanhassen Hills Dr. S. Chanhassen, MN 55317 Amy Powell & Carlos Puig 8581 Chanhassen Hills Dr. S. Chanhassen, MN 55317 Greg & Kelly Debenedetto 8593 Chanhassen Hills Dr. S. Chanhassen, MN 55317 Kathy & AJ Dordel 1030 Lake Susan Drive Chanhassen, MN 55317 Denise & Paul Enberg 8608 Chanhassen Hills Drive Chanhassen, MN 55317 Mark Erickson 1110 Lake Susan Drive Chanhassen, MN 55317 Sarah Federer 1090 Lake Susan Drive Chanhassen, MN 55317 Steve Fuhrman 1031 Lake Susan Drive Chanhassen, MN 55317 Glen &Joan Gerards 1071 Barbara Court Chanhassen, MN 55317 Craig & Elaine Heitz 1011 Lake Susan Drive Chanhassen, MN 55317 David Jacobson 1100 Lake Susan Drive Chanhassen, MN 55317 Stacey Lakosky 991 Lake Susan Drive Chanhassen, MN 55317 Tina Love - Jensen 1050 Barbara Court Chanhassen, MN 55317 Vicki & Humphrey McKenzie 1021 Lake Susan Drive Chanhassen, MN 55317 Lauren & Chad Olsen 1071 Lake Susan Drive Chanhassen, MN 55317 Timothy & Shari Hoeft 8600 Chanhassen Hills Drive Chanhassen, MN 55317 Sue Ries 8604 Chanhassen Hills Dr. S. Chanhassen, MN 55317 Veronica & Todd Schulz 1070 Lake Susan Drive Chanhassen, MN 55317 Kelly & Jay Seltun 1040 Lake Susan Drive Chanhassen, MN 55317 Scott & Laurie Simonson 1051 Barbara Court Chanhassen, MN 55317 Jim Subak 1060 Lake Susan Drive Chanhassen, MN 55317 Bruce Tanquist 8569 Chanhassen Hills Dr. S. Chanhassen, MN 55317 Chris & Jen Thorpe 1050 Lake Susan Drive Chanhassen, MN 55317 Rick & Wendy Ulku 1020 Lake Susan Drive Chanhassen, MN 55317 James & Jo Wolf 8585 Chanhassen Hills Drive Chanhassen, MN 55317 Jeff & Patty Yeager 1120 Lake Susan Drive Chanhassen, MN 55317