Laserfiche WebLink
3 <br />C:\Mounds View Part 1 WHPP\Attachment 1 Mounds View Scope of Work.docx <br /> <br /> The MDH provided well vulnerability assessments for the Mounds View water supply wells at <br />the Scoping Meeting. We have assumed that these assessments will not change. <br /> After completing the WHPA delineations, Barr will delineate the DWSMA that encompasses the <br />WHPP. DWSMA delineation can be done using identifiable geographic boundaries such as roads, <br />political boundaries, public land survey section boundaries, or property parcel boundaries. We <br />have assumed that property parcels will be used to delineate the DWSMA. The City may request <br />an alternate approach for the DWSMA delineation. We have also assumed that the City will <br />provide or be able to obtain a GIS shapefile of property parcels that can be used to delineate the <br />DWSMA. <br /> An assessment of well and aquifer vulnerability will be conducted using available geologic <br />information such as the county geologic and/or well logs stored in the Minnesota Geological <br />Survey’s County Well Index (CWI). We have assumed that the existing MDH well vulnerability <br />assessments for the Mounds View water supply wells will not require revisions. We have <br />assumed that well logs for up to 40 wells obtained from the CWI may be used in assessing the <br />vulnerability of the DWSMA. The vulnerability assessment will also include the preparation of <br />up to two geologic cross sections. <br /> The MDH also requires that Part 1 of a WHPP include a listing of property parcels within the <br />DWSMA (even if parcel boundaries are not used to delineate the DWSMA). Barr will prepare a <br />listing of property parcels within the DWSMA using parcel data obtained from the City. <br /> The following criteria will be used in the WHPA delineation: <br />o Time of travel: A 10-year groundwater time of travel will be used to delineate the WHPAs <br />for the Mounds View wells. In addition, the one-year groundwater time-of-travel zone and <br />the Inner Wellhead Management Zone around each Mounds View well will also be <br />delineated, as required by the Wellhead Protection Rules. <br />o Flow boundaries: Groundwater flow boundaries such as lakes, rivers, and high capacity <br />wells will be included in the porous media groundwater flow model used for the WHPA <br />delineations. These flow boundaries were included in the New Brighton model. We have <br />assumed that no modifications will be necessary to far field boundary conditions in the <br />groundwater flow model that will be used. <br />o Aquifer transmissivity: As noted above, we have assumed that MDH will not require an <br />aquifer test as part of this project. <br />o Daily volume of water pumped: The daily volume of water pumped by Mounds View’s <br />wells used in the groundwater flow model will be determined by comparisons of annual <br />water-use totals from the previous five years with projections of annual water use over the <br />next five years. We have assumed that this water use data will be supplied to Barr by the City <br />in electronic format.