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REQUEST FOR COUNCIL ACTION <br />DATE: April 1 1,200?'^)-^^ <br />ITEM NO.a ‘‘U <br />Department Approval: <br />Nam Gregory A. Gappa <br />Title Director of Public Services <br />Aoministrator Reviewed: Agenda Section: <br />Public Services Director ’s Report <br />Item Description: Spates Avenue Lift Station Number 22 Valves Improvement Project <br />TTie Spates Avenue lift station is located at the County Road 15 and Spates Avenue inters© ’m. This <br />lift station was constructed in 1982 as part of the Crystal Bay neighborhood sewer p jject and <br />discharges into the MCES interceptor sewer located in County Road IS. The shutoff va. ve to isolate <br />this lift station, from the MCES interceptor sewer, is located in County Road IS 'vhich makes it <br />difficult to access the valve because of the heavy traffic in the county road. This shutoff valve needs <br />to be closed when work is completed on the lift station. This project is to add a new shutoff valve <br />next to the lift station to allow for lift station woric without the necessity to access the shutoff valve <br />in the county road. <br />Several years ago, an emergency repair project to replace a broken forcemain had to be completed at <br />the lift station on County Road 1 S at the Windward Marina. This station also had the shutoff valve <br />located in the county road similar to the Spates Avenue lift station. Replacement of the forcemain <br />required dewatering the site because of the high water table adjacent to the lake. To take full <br />advantage of the site dewatering a new shutoff valve was installed for this station and new stainless <br />steel bolts were installed on the shutoff valve in County Road IS as the existing bolts were severely <br />corroded. This project required the closing of County Road 1 5 and was completed at night when <br />there was less traftic. <br />Based on past experience from the Windward Marina lift station project, we are recommending that <br />the Spates Avenue lift station project, in addition to the installation of a new shutoff valve also <br />include the installation of a new forcemain pipe and stainless steel bolts on the shutoff valve in <br />County Road 1 5. The site needs to be dewatered to install the new shutoff valve, so to take advantage <br />of the dewatering; the work in County Road 1 5 should also be completed at the same time. This <br />project will require the closing of County Road IS and will need to be completed at night. <br />Completion the additional work in the county road will reduce the potential for future emergency <br />failures which would be problematic based on the heavy traffic, the high flow in the MCES <br />interceptor sewer, and the high water table adjacent to Lake Minnetonka. We have obtained <br />quotations for this project and are recommending acceptance of the quotations from Valley Rich <br />Con pany and Northern Dewatering. These are the same companies that worked on the Windward <br />Manna lift station project which was successfully completed in timely manner and allowed for the <br />reopening of the county road before the morning rush hour period.