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I REQUEST FOR COUNCIL ACTION 2 DATE.- 02/25/08 3 4 ITEM.- 13.c 5 6 Department Approval: Manager Reviewed: Agenda Section: 7 8 wim 9 to I I Item Description: Watermain Lining Project 12 13 14 Background: City staff has been monitoring developing technologies to rehabilitate 15 watermains. This technology has improved to allow the rehabilitation of mains without having 16 to excavate and replace the existing pipe. This technology has been developed by companies in 17 the southern United States and in Canada. Staff has been working with several other metro area 18 cities to consider bidding projects together to improve the cost effectiveness of an out of state 19 contractor sending a crew to our area to rehabilitate watermain in each of the participating cities. 20 21 Discussion: Staff has identified a segment of watermain between Woodhill Avenue and County 22 Road C-2 between Churchill St. and Oxford St. as a potential candidate for mainlining. (See 23 attached location map) This main is located in backyards of homes and has a history of recent 24 breaks with property damage. This would be a very difficult project to replace the main with 25 traditional open cut methods. This method of rehabilitation is least disruptive to property owners 26 in time and physical disruption to their backyards. We feel that the estimated cost of lining this 27 segment of watermain is approaching the cost of traditional open cut replacement given the field 28 conditions of this segment. If this neighborhood was constructed today we would be constructing 29 the watermain in the street or boulevard area to avoid the maintenance and replacement 30 difficulties we have on this segment. 31 32 We have been working with the cities of Edina, Minnetonka, Eden Prairie, St. Paul, and White 33 Bear Township to coordinate a project in each city that would be bid concurrently but awarded 34 individually. We anticipate the need to contract for development of the plans, specifications, and 35 bid documents to a consultant engineering firm to work through scheduling and coordination 36 issues between the cities. Each city will sign a professional services agreement with the 37 consultant. We have been working with TKDA consulting engineers on this project as a group. 38 Roseville's anticipated cost for engineering services is estimated at $,17,400. The estimated 39 construction cost is approximately $,200,000 for the lining project. This will rehabilitate just 40 under 2,,000 linear feet of watermain. 41 42 Staff will present additional information on this construction process and cost estimates at your 43 meeting on February 25, 2008. 44 45 Financial Considerations: The annual Water Utility budget anticipates capital replacement of 46 watermains. This project will be funded out of the Water Utility fund. Staff is seeking 47 authorization to contract with TKDA consulting engineers for design services including 48 development of plans, specifications, and bid documents for an estimated amount of $,17,400. 49 We will be back to the Council for approval of bids in May for summer construction of this 5 0 prof ect.