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owarc March 1, 2004 File: 822480j -0060 Mr. Joel Hanson City Administrator City of Little Canada 515 Little Canada Road Little Canada, MN 55155 R. Green Co RE: TWIN LAKE AREA WATERMAIN OPTIONS Dear Mr. Hanson: oa c1y The City is currently exploring various options to supply watermain to the Twin Lake Area as part of the proposed street improvements in 2004. The two sources of water that could be utilized are from Little Canada south of Interstate 694 and from the City of Vadnais Heights at the intersection of Twin Lake Boulevard and Vadnais Boulevard. Given the two sources of water there are also various options for extending the existing watermain to the Twin Lake Area. This letter will serve to outline the options and provide estimated construction costs. The construction costs provided are for watermain improvements only and do not include the street reconstruction costs for Twin Lake Road and Twin Lake Trail. City of Little Canada Watermain If City of Little Canada watermain is to be provided to the residents in this area, it will require jacking watermain under Interstate 694. There are two options associated with this that will provide either longer dead end runs of watermain or increased cost. They are outlined in Table 1 as Option 1 and 2. An exhibit has been attached that depicts the proposed crossing locations. The proposed watermain jacking at the west side of Twin Lake Boulevard is proposed for both options. The next issue to discuss if Little Canada watermain is provided is the length of dead end watermain. Regardless of the location of the watermain jackings, there will be approximately 1900 - feet of dead end watermain on the east end of Twin Lake Boulevard. It would be feasible from an engineering standpoint to extend the watermain from the end of the cul -de -sac on Twin Lake Trail around Twin Lake to the end of the cul -de -sac on Twin Lake Court. The existing section of Vadnais Height's watermain through the Twin Lake Court development extended to the current termination point on Twin Lake Boulevard could then be used as the final portion of the loop. This option is noted as Option 3. The issues surrounding this option include an agreement that would be necessary with Vadnais Heights to assume ownership of the watermain on Twin Lake Court and additional cast. If an agreement could not be reached with the City of Vadnais Heights it is also possible to construct a new parallel line. The construction cost of the parallel main is not included. This option does include the jacking under Interstate 694, however the crossings would be completed at the locations noted for Option 1. C:Awinclows\TEMPyItr 030104 Hanson.doc 2 8