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Table of Contents Page 1.0 Section 1 - Introduction ..........................................................................................1 1,1 Authorization and Need.........................................................,...........................1 1,2 Background""".."..",.. ...., ..........".."...,..,...... ......"... .............""..,....,..""" ........2 1,3 History of Water Management Programs in Minnesota.................,..............,.....2 1.4 Other Government Jurisdictions.........................................................,..............3 1.4.1 Minnesota Board of Water and Soil Resources (BWSR)........................3 1.4.2 Natural Resources Conservation Service (NRCS) .................................3 1.4.3 Soil and Water Conservation District (SWCD) .......................................4 1.4.4 Sauk River Watershed District ..................................................,............4 1,4.5 Stearns County,..............",........"....,......"..............,..............................4 2.0 Section 2 - Physical Environment............................,....."...........,.....,.....".............6 2.1 Topography and Geology,........""",..,..,......,..............................................,......6 2,2 Hydrogeology.., .....'"...."".., .....,..,..,,'............',,'.....' ..........,.., ...............',.... ........ 7 2.3 Soils",...."", ..", ......, ........, ..............", ...........'..','..,..' ..........,.., ..........,..",.. .......... 7 2.4 Precipitation.. ........."........, ......., ......, ................,...... .........., .............,'..',.., .......1 0 2.5 Lakes, Rivers, and Wetlands......................................................,....................11 2,5,1 Lakes,.. .......".... ............ .......... .......,.."...".."..",.....,.... ......,..,.."", ....... ,11 2,5,2 Rivers................................,.......".................""",.....,......"...""",........ 13 2,5,3 Wetlands.... ............... ..............""".., ...............,.., ....."",..".....",.., .......13 2,5,4 Public Waters ............ .......,.. ....." ....... ..............,..,...."..'"", ..... ,..',.....' ..15 2,6 Biological Survey.... .............., .........' ....., ........, ....., ........... ,.......,'...,....'.....' .......16 2.7 Land and Water Use ............,........."...............,......................."",...................16 2,7,1 Land Use.......... .."....,........."............."....,........................................, ..16 2.7.2 Water Quality and Water Use ,......."."",.",..,........."..........".......,.,.",..17 3.0 Section 3 - Hydrologic Analysis.....................,.....................................................20 3.1 Hydrologic Analysis".., .........' ........" ....................', ..,...........,..'"""..."""" .......20 3.2 Watersheds.,..""""",.",.....""..,.."""........."",....".............."""""....""".,.... ..20 3,3 Soils Information """............,.....,....,........."..""..,..................,...............,..,..... 20 3.4 Land Uses and Curve Numbers ........................,.............................................20 3,5 Time of Concentrations.......,...,..,...".."....,......"..,..................................,...... ..21 3,6 Existing Conditions Modeling Results......,...................................................... .21 3,6.1 Watersheds" ..........".."", ......"".." .......,...., ...................... .........., ........21 3.6.2 Drainage Results ..........", ......"".." ......." ......................." ...... ....., ........21 3.6.3 Storm Drain System".."" .......",.." .........,.. ................ ......, ............ ........21 3,7 Developed Conditions Modeling Results .........................,...............................22 3,7.1 Watersheds".............."............,............................,............................ ,22 3,7.2 Land Use",.."., ...... .....", .............. .....' .............", .......................... ........22 3,7,3 Wetlands"""..,....",...." ...................... ...........",...', ....................... .......22 SEH is a registered trademark of Short Elliott Hendrickson Inc. Storm Water Management Plan St. Joseph, Minnesota A-STJOE0315 Page i Table of Contents (Continued) 3.7.4 Storm Water Ponds........................................................................... ..23 3,7,5 Summary Discharge Data.....,.." ..........' ..........,..,...' ...........' ....""", ......24 3,8 Proposed Regional Water Quality............................,.,...................,..............., 24 3,8,1 Lakes"",........"."""".."........"...,..".,...."...".,....".,..""""""....."..,.,.... 24 4.0 Section 4 - Goals and Policies ............................................,............................,...32 4.1 Analysis of Management Strategies..............,................................................, 32 4.1.1 Conveyance Philosophy...................................................................... 32 4.1,2 Ponding Philosophy............................................................................. 32 4.1,3 Combination Ponding and Conveyance Philosophy................,............32 4,1.4 Develop and Treat Philosophy.............................................................32 4,1,5 Regional Pond Philosophy................,.................................................. 33 4,1.6 Land Use Control Philosophy ...................................................,..........33 4,1.7 Enhanced Practices Philosophy ..........................................................33 4,2 St. Joseph Goals and Policies......................................................................... 33 4.3 Identification and Implementation of Improvements.........................................35 5.0 Section 5 - Implementation........................,.. ..... ....... ......., ....... ..................... ........ 37 5.1 Introduction.................,.....................""",......,.........................."".............,.." 37 5.2 Implementation Priorities .............. .......", ......., ......."....".., ...................""...",..37 5,3 Cost/Benefit for Pollutant RemovaL.................................................,............. ..39 5.4 Amendment Procedures,...."....,....., .......... ......., ....... .........."""..,...."....... .......41 5,5 Request for Amendments....,.., ..........."",'..,..." ...., ........ .........,..",.. ..............".41 5,6 Staff Review..,..",........,........................",......,.............,..............."............."", 41 5,7 Council Consideration.................",............,.........................................,.... ..... ..42 5,8 Public Hearing and Council Approval...............................................,..............42 5,9 Council Adoption..,........,..,......"....",......"......,.,....,..............",......."",..,......... 42 5,10 Annual Report to Council .............................,..................................................42 5.11 NPDES, Phase II.."",....,.. ......, .......... .........,..,....', ........ ............." ................,.. ,42 5.11,1 Construction Permit ..........,..................................................................42 5,11,2 MS4 Permit.....................""".."....,......"......."........"..............."......"..42 5. 12 GiS".. . . .. . .. .. . .. .. . .. , .. .. .. .. .. .. . .. .. .. .. .. . .. , , .. .. .. .. .. . .. .. .. , .. .. , .. .. . .. .. , .. , , , , .. . .. .. , .. , , , , , , , .. .. , , .. 43 Storm Water Management Plan St. Joseph, Minnesota A-STJOE0315 Page ii Table of Contents (Continued) List of Tables Table 1 Study Area Soil Types, ,.. ......,'....',...""",'..,'.., ........, ............................. ..,..,... .... ......9 Table 2 Summary of Soils Group ..................................................................................,....10 Table 3 Rainfall in St. Joseph Area (inches),........................................................,............,11 Table 4 St. Joseph Area Lakes and Wetlands....,..............................................................,12 Table 5 St. Joseph Area Wetlands - Circular 39 Classification ................,.........................14 Table 6 Wetland Classification.................,.........".............".................,.......,....."............. .15 Table 7 Water Appropriation Permit................................................................................. ..17 Table 8 Ground Water Sensitivity to Pollution ....................................................................18 Table 9 Pollutant Sources............................",.......,.............................,........................",.. 19 Table 1 0 Watersheds - Existing Conditions............................................................,......... ..26 Table 11 Watersheds - Developed Conditions ..................................................................27 Table 12 Ponds - Developed Conditions ..........................................................................,29 Table 13 St. Joseph SWMP Implementation Summary...........................,..........................37 Table 14 Capital Improvement Plan................................................................................... 38 Table 15 Operating Costs.........................."..,.......".. .......................................,............... 39 Table 16 Capital and Maintenance Costs for BMP's ..........................,...............................40 Table 17 Pond Construction Cost Estimate....................,.................................................. 44 Table 18 Storm Sewer Construction Cost Estimate..........................,.......... ,......................45 Storm Water Management Plan S1. Joseph, Minnesota A-ST JOE0315 Page iii Table of Contents (Continued) List of Figures Figure 1 - Location Map Figure 2 - St. Joseph Water Management Plan Study Area Figure 3 - Surficial Geology Map Figure 4 - Bedrock Geology Map Figure 5 - Quaternary Water Table Elevation Map Figure 6 - Soils Map Figure 7 - Protected Lakes and Wetlands Figure 8 - Wetlands Map Figure 9 - Existing Land Use Figure 10 -Annexation Phasing Map Figure 11 - Future Land Use Figure 12 - Groundwater Sensitivity to Pollution Figure 13 - St. Joseph Area Hydrology Study Figures 14 - Study Area Watershed Details Figures 15 - Study Area Watershed Details Figures 16- Study Area Watershed Details Figures 17 - Study Area Watershed Details Figures 18 - Study Area Watershed Details Figure 19 - Study Area Storm Sewer Groupings Appendix A Appendix B Appendix C Appendix D Appendix E Appendix F Appendix G Appendix H Appendix I Appendix J Appendix K Appendix L List of Appendices State of Minnesota Rules Governing Local Storm Water Management Plans Stearns County - Erosion Control and Storm Water Ordinances, Jan. 2004 Rainfall Frequency Atlas of the Midwest Clean Water Act 303(d) List of Impaired Waters (partial) MPCA Generators of Hazardous Waste in St. Joseph Existing Conditions Hydrologic Modeling Results Developed Conditions Hydrologic Modeling Results Pond Design Standards Best Management Practices (BMPs) Regulatory Responsibilities Example Agreement (regarding Storm Water Management Practices Water Quality Treatment Pond) References Storm Water Management Plan St. Joseph, Minnesota A-ST JOE0315 Pageiv