03-24-2003 Council Packet - Laserfiche WebLink

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> (\ DATE: March 24,2003 ITEM NO.: /O Agenda Section: ’ubiic Services Director's Report h sewer and water systems arc s. completed a modeling study bilities for the interconnection and a copy is attached for your is water main interconnections jr possible additional elevated onstruction of a new w ell. 1 he rk area. We arc recommending >n project. equire further discussion. The the CitN of Long Lake’s water .ake water tower is dependant regarding the Orono Industrial Lake for the installation of two ling 8" connection at Highway n is normallv closed and onlv• # 3n one of the systems. Ihe two .Tconnection tire Ilow capabilities cf both isonahle fire flow as tlic Orono system has one well and 400,000 gallons of elevated tank storage, and the Long lake system has two wells and 250,000 gallons of elevated tank storage. Additional interconnections w ill also provide greater flexibility for other emergencies such as watermain breaks. With the additional interconnections, it will be possible to reduce service disruptions from watermain breaks. The two new interconnections arc located at Brimhall Avenue and Virginia Avenue. The Brimhall Avenue connection will require jacking a pipe crossing under Highway 12. At the Virginia avenue crossing both cities have watermain on the north side of the highway, which reduces the cost for this interconnection. There are currently two contractors working in the City of Long Lake on the Highway 12 utility relocation projects, and the plan is to negotiate a Change Order to the utility construction contract w ith one of the utility project contractors. 1 his will allow for a faster time line to complete the interconnection project and eliminate the costs associated with advertising for bids for the watermain interconnection project. The amount of this change order will be well w ithin the 25% acceptable limits for contract change orders. Council approval w ill be required to approx e the contract change order. At this time we are requesting conceptual approval to begin work on this project. At their March 18"* meeting, the Long I.ake Council also authorized city staff to begin preliminary work on this interconnection project Orono Industrial Park Water System The industrial park is currently serv ed by tw o dead end 8" watermains that cross under highway 12, These highway watermain crossings were installed in 1967 and are not in casings, which means a watermain break under the road would require closing the road for repair. With the heavy traffic volume on Highway 12, this repair work would be very difficult to complete without causing a major traffic disruption. These two stubs to the industrial park are connected to an 8" watermain along the north edge of Highway 12. This watermain was also installed in 1967, and we have had several watermain breaks on this line. Repair of these breaks is difTicult because of the heavy traffic on the highway. Also, the recent safety improvements project widened the highway resulting in the watermain being closer to the traffic lanes and in the turn lanes. The two stubs to the industrial park are also not interconnected. One stub serves Morries Imports, the former Washington Scientific Industries building, and the other stub serves the other buildings and the two houses at the Old Crystal Bay Road intersection. If cither one of these stubs breaks, buildings would be without water service until the break is repaired which would most likely be overnight, so as not to cause a major traffic jam on .lighvvay 12. We are recommending that two stubs be interconnected on the south side of Highway 12. This interconnection would allow for continued water serv ice to the industrial park should one of the stubs break. A preliminaiy estimated cost for this interconnection is $25,000. This is a high priority project, and we are requesting authorization to move forward on this project. W’e will evaluate the best possible method for completion of this project. Council approval will be obtained after the contractor has been selected and final costs determined. Page 2 of 3