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continually changing as cities update their Wellhead Protection Plans, with the general trend being to <br />expand the boundaries as regulations become stricter. A significant portion of the City lies within a <br />DWSMA and is unsuitable for stormwater infiltration practices. The Minnesota Stormwater Manual <br />contains a flowchart that lays out MPCA and Minnesota Department of Health guidance on the use of <br />infiltration in DWSMAs. In general, infiltration is prohibited or strongly discouraged in areas of high or <br />very high vulnerability or in high, very high, and moderate vulnerability areas within Emergency Response <br />Areas. Infiltration is likewise prohibited or strongly discouraged in areas of moderate vulnerability unless <br />a higher level of review indicates that it is acceptable. Infiltration is feasible in areas with low vulnerability <br />that are also outside Emergency Response Areas, as well as areas outside DWSMAs, subject to other <br />potential restrictions (soil type, contamination, etc.). <br />Figure 2.3 — Drinking Water Supply Management Areas <br />LEGEND <br />SOURCE V ATER PROTECTION DATA <br />WM EMERGENCYRESPONSEAREA <br />W WELLHEAD PROTECTION AREA <br />DRINKING WATER SUPPLY <br />MANAGEMENTAREA <br />DWSMA VULN ERABILITY <br />DATA SOURCE: MN DEPT. OF HEALTH <br />SOURCE WATER PROTECTION <br />MARCH 2-{]79 <br />2.6 CLIMATE <br />The National Weather Service (NWS) station at Chanhassen, Minnesota publishes climate data for the <br />Twin Cities area. The NWS is a branch of the National Oceanic and Atmospheric Administration (NOAA). <br />Table 2.1 provides a summary of average precipitation data for the Twin Cities area. <br />City of Mounds View 7 <br />Local Surface Water Management Plan Stantec Project No. 193804166 <br />1.197 <br />5tantec <br />