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SECTION 2 <br /> <br /> <br /> <br /> <br />Surface Water Management Plan Section 2: Land and Water Resource Inventory <br />City of Arden Hills <br />WSB Project No. 3455-200 Page 9 <br /> <br />Lakes > Data and Reporting. The DNR Lakefinder is located at <br />http://www.dnr.state.mn.us/lakefind/. Summary water quality data is available for all the lakes in <br />Arden Hills except Sunfish Lake (no data) on the TCAAP property. This lake has the potential to <br />be studied and monitored as part of the redevelopment of TCAAP. <br /> <br />2.2.8. Shoreland and Floodplain Ordinances <br /> <br />Arden Hills has DNR-approved Shoreland and Floodplain Ordinances (Appendix B). It is <br />important that the shoreland of lakes be protected and developed in a manner consistent with the <br />DNR management standards to maintain or improve the quality of the water bodies within the <br />City. <br /> <br />The relevant Flood Insurance Rate Map (FIRM) panels prepared by the Federal Emergency <br />Management Agency (FEMA) are attached in the City’s Official Zoning Map. This material is on <br />file in the Office of the City Administrator. The floodplain boundaries for the City are shown in <br />Figure 8. Flood maps are available showing the different flood zones mentioned in the ordinance <br />by going to FEMA’s website at https://msc.fema.gov/portal. <br /> <br />Based on the FEMA flood insurance study, the City has adopted a Shoreland Management <br />District. This District regulates the development of public water shoreland to preserve and <br />enhance surface water quality. A copy of these regulations can be found on the City’s website at <br />in Chapter 13 of the Zoning Code and in Appendix B. <br /> <br /> <br />2.2.9. Flood Hazard Zones <br /> <br />Figure 8 shows areas of flood hazard according to the FEMA FIRMs. These areas surround <br />water bodies and wetlands that are subject to inundation by the one percent annual chance flood <br />event. Zone AE areas have established base flood elevations, while Zone A areas do not. <br />Valentine Lake, Lake Johanna, Little Lake Johanna, and Lake Josephine have established base <br />flood elevations according to FEMA and are labeled on Figure 8. <br /> <br />RCWD has one percent flood elevations based on both modeling and monitoring data separate <br />from FEMA. RCWD determines the high water elevations comparing current modeling/monitoring <br />data against FEMA data and taking the highest elevation of the two. <br /> <br /> <br />2.2.10. Wetlands <br /> <br />Figure 6 shows the wetlands within the City of Arden Hills that are included in the National <br />Wetlands Inventory (NWI) prepared by the U.S. Fish and Wildlife Service. Areas shown on the <br />DNR and NWI maps indicate the presence of wetlands, but show only their general locations. Site <br />visits for delineation of wetland boundaries are required for permitting. It should be noted that <br />some of these wetlands may have been created as stormwater detention basins in conjunction <br />with urban development. <br /> <br /> <br />2.3. Surface Drainage Utilities <br /> <br />2.3.1. Public Ditches (RCWD) <br /> <br />The City of Arden Hills has public ditches within the City limits. Most of the ditches in the RCWD <br />were constructed primarily to drain land for agricultural purposes. Ramsey County Ditch 4 drains <br />Dr <br />a <br />f <br />t <br /> <br />11 <br />/ <br />2 <br />0 <br />/ <br />2 <br />0 <br />1 <br />7