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HomeMy WebLinkAbout5N - AFB - Well No.10 16200 Eagle Creek Avenue S.E. Prior Lake, MN 55372-1714 CITY COUNCIL AGENDA REPORT MEETING DATE: AGENDA #: PREPARED BY: AGENDA ITEM: JULY 17,2006 5N STEVE ALBRECHT, DIRECTOR OF PUBLIC WORKS CONSIDER APPROVAL OF A RESOLUTION AUTHORIZING ADVERTISEMENT FOR BID FOR WELL NO. 10 PUMP TEST MONITORING WELLS DISCUSSION: Introduction The purpose of this agenda item is for the City Council to authorize advertisement for bids for construction of monitoring wells needed for the Well No. 10 Pump Test. Historv The City of Prior Lake currently operates five municipal wells to provide water to the community. In the fall of 2005 the City began construction of Wells 8 and 9. Wells 1 and 2 have been abandoned and are no longer used by the City. The City pumped approximately 705,000,000 gallons of water in 2005. In order to continue to meet community demands, Well No. 10 is needed to provide adequate water supply for on-going development within the City. The costs for this project are paid by the Trunk Reserve Funds and not through taxes. The City of Prior Lake pumps the majority of our water from the Jordan Aquifer. In northern Scott County the Jordan Aquifer is linked to the Savage Fen. The Savage Fen is a Calcareous Fen or wetland that has very unique plant species as it is fed by ground water from the Jordan Aquifer. For this reason the Department of Natural Resources (DNR) has implemented strict policies regarding withdrawal of water from this aquifer in northern Scott County. The City of Prior Lake is regulated by these rules and must complete a detailed ground water modeling to demonstrate that proposed future wells will not impact the fen negatively. In the fall of 2005 City Staff met with DNR staff regarding future wells in Prior Lake. It was determined that prior to construction of Well No. 10 or any future wells by the City that the City will need to provide detailed groundwater modeling and pumping test information to the DNR. In January of 2006 the City Council authorized Barr Engineering to proceed with developing a pump test as described above. The DNR and Barr are recommending that the City Construct five monitoring wells for use in the test and for future monitoring of the groundwater on the west side of Prior Lake. Current Circumstances In order to complete the proposed pump test the City needs to construct five (5) small diameter (4 inch) monitoring wells. These wells will be used during the test to monitor changes in the groundwater levels. The wells will provide critical monitoring data which is used to determine the impacts of pumping on Reports\July 17 2006\WELL 10 Monitoring Welis www.cityofpriorlake.com Phone 952.447.4230 / Fax 952.447.4245 the Savage Fen. Additionally these wells will allow the City to monitor any potential impacts to township wells from the pump test. Two wells will be located on the City's Spring Lake Park property, another will be located on CR 12 adjacent to Stemmer Ridge (a.k.a. Spring Lake Estates) and the last two will be located in one of the City's parks along the west side of the lake yet to be determined. Because two of the wells will be located adjacent to future Well No. 10 they will also serve as test wells to ensure that the water bearing formation is present prior to constructing Well No. 10. ISSUES: These monitoring wells should be constructed prior to the construction of Well No. 10 which is needed by February of 2007 for the pump test. FINANCIAL IMPACT: The City has allocated a total of $1 ,73S,000 in the 2006 and 2007 CIP's for Well No. 10. The well and well house are expected to cost $1,400,000. The balance of the funding is needed for the test wells, engineering services and pump test required for this well. The proposed pumping tests should not need to be repeated in the future as it is anticipated that a long term well agreement will be reached with the DNR based on the Well No. 10 tests. Because this well and the required studies are needed for future development this project is funded from the Trunk Reserve Fund. The City currently collects $S,SOO.OO/acre from developers for construction of water system improvements needed due to development. The cost of Well No. 10 will be funded solely by the money collected from new developments and will not receive funding from the general fund. The funding for Well No. 10 is currently available in the Trunk Reserve Fund. ALTERNATIVES: The alternatives are as follows: 1. Approve a resolution authorizing advertisement for bids for construction of five monitoring wells for the Well No.1 0 Pump Test. 2. Table this agenda item for a specific reason. 3. Deny this agenda item for a specific reason and provide staff with direction. RECOMMENDED MOTION: Staff recommends alternative number 1. R.\Agenda Reports\July 17 2006\WELL 10 Monitoring Wells Agenda.doc 16200 Eagle Creek Avenue S.E. Prior Lake, MN 55372-1714 RESOLUTION 06-xx CONSIDER APPROVAL OF A RESOLUTION AUTHORIZING ADVERTISEMENT FOR BID FOR WELL NO. 10 PUMP TEST MONITORING WELLS Motion By: Second By: WHEREAS, The City Council approved the pump test for Well No. 10 on January 17, 2006; and WHEREAS, The City Council approved preparation of plans and specifications for Well No. 10 on June 26, 2006; and WHEREAS, The monitoring wells are necessary for construction of Well No. 10 and completion of the pump test; and WHEREAS, Funding for this project is available in the trunk reserve fund. NOW THEREFORE, BE IT HEREBY RESOLVED BY THE CITY COUNCIL OF PRIOR LAKE, MINNESOTA as follows: 1. The recitals set forth above are incorporated herein. 2. Staff is authorized to advertise for bids for the construction of five monitoring wells as required for the Well No. 10 pump test. PASSED AND ADOPTED THIS 17TH DAY OF JULY, 2006. YES NO Haugen Haugen Dornbush Dornbush Erickson Erickson LeMair LeMair Millar Millar Frank Boyles, City Manager R:\Agenda Reports\July 17 2006\We1l1 0 Monitoring we~SIffiI~~lake.com Phone 952.447.4230 / Fax 952.447.4245