2012_1119_Packet - Laserfiche WebLink

Home

Page 2 of 3 2. Sanitary Sewer lining and replacement, watermain replacement: The majority of the 29 city’s sanitary sewer mains were constructed in the late 1950’s and early 1960’s, utilizing 30 clay tile pipe. Over time the joint materials have failed allowing root intrusion. The pipe is 31 also susceptible to cracking and construction damage. The 2013 Capital Improvement Plan 32 recommends funding for a sanitary sewer main lining program to extend the life of our 33 sanitary sewers by 50 years or more. This technology essentially installs a new resin pipe 34 inside the old clay tile sewer main without digging up city streets, which results in minimal 35 disruption to residents during construction. The liner pipe is inserted into the main through 36 existing manholes and cured in place with a heat process. Any given segment is usually 37 completed in one working day. Service line connections are reopened using a robotic cutter 38 and remote cameras. During the process, existing flows are bypassed using pumps. This 39 technology has been proven over the past 20 years, and costs have become competitive with 40 open cut replacement. The City started doing this type of renovation on and annual basis in 41 2006 and will have an annual project for the foreseeable future to replace our aging sewer 42 infrastructure. This technology also prevents infiltration of groundwater into the system and 43 can be credited toward current and future inflow/ infiltration surcharge. The location of this 44 work varies and is spread throughout the City based on system priority. 45 We are also evaluating sanitary and storm sewer replacement needs in our pavement 46 replacement areas as well as utility infrastructure needs in County and State project areas. 47 Those replacements are being identified as the project plans are being developed and will be 48 communicated to the Council at a later date. 49 We are recommending replacement of the cast iron watermain as a part of the County Road 50 D reconstruction project which is under design jointly with the City of Shoreview. We are 51 also evaluating additional replacement of other mains. These watermains were installed in 52 the early 1960’s and have experienced several breaks. This is the lowest cost opportunity to 53 replace this infrastructure. 54 3. Storm Sewer system improvements: An extreme rain event occurred this summer on July 55 16, 2011, that caused flooding in several areas of the City. Since the storm, staff has 56 completed several studies to analyze the existing drainage systems and localized flooding 57 issues. The studies also identified potential improvements throughout the neighborhoods that 58 would reduce the level of flooding. Staff is now working on developing a 2013 drainage 59 improvement project to alleviate some of thes e flooding concerns. The specific locations of 60 improvements are being identified as the project plans are being developed and will be 61 communicated to the Council at a later date. 62 4. Seal Coat: Pavement maintenance policies support an annual seal coat program of 63 approximately 14-15 miles of city streets each year. This consists of applying a thin film of 64 bituminous oil and covering it with fine aggregate. These treatments have proven to add a 65 minimum of 10 years to the life of the pavement. 66 5. Pathways : Staff is developing plans for a side walk project on County Road B-2 from 67 Lexington Ave. to Rice St. This project will be funded by the Park Renewal Bonds. Staff is 68 working closely with the Park Renewal Project Team on this project. This project is 69 anticipated to be completed by the end of Fall 2013. 70 F INANCIAL I MPACTS 71 Staff is developing preliminary cost estimates for the projects at this time. We anticipate the 72 total work plan cost to be in the $3.5 to $4 million dollar range. The Street Infrastructure Fund 73