Klein Creek Watershed-Based Plan August 2017 Funding for this plan was provided, in part, by the U.S. Environmental Protection Agency and Illinois Environmental Protection Agency (IEPA) through Section 319 of the Clean Water Act under Financial Assistance Agreement No. 3191503. The findings and recommendations contained in this report are not necessary those of the funding agencies. 1 Table of Contents Table of Contents .......................................................................................................................................... 2 Figures ........................................................................................................................................................... 4 Tables ............................................................................................................................................................ 5 1. Introduction .......................................................................................................................................... 6 2. Klein Creek Watershed Planning Area .................................................................................................. 7 2.1 Planning Area ...................................................................................................................................... 7 2.2 Local Stakeholders ............................................................................................................................ 10 2.2.1 Klein Creek Watershed Steering Committee ............................................................................. 10 2.2.2 West Branch Watershed Protection Workgroup ....................................................................... 11 2.2.3 Local Community Outreach ....................................................................................................... 11 2.3 Mission .............................................................................................................................................. 12 3. Watershed Resource Inventory .......................................................................................................... 13 3.1 Demographics ................................................................................................................................... 13 3.2 Local Jurisdictions ............................................................................................................................. 17 3.3 Physical & Natural Features .............................................................................................................. 19 3.3.1 Climate ....................................................................................................................................... 19 3.3.2 Topography ................................................................................................................................ 20 3.3.3 Geology ...................................................................................................................................... 21 3.3.4 Soils ............................................................................................................................................ 21 3.4 Land Use & Land Cover ..................................................................................................................... 29 3.4.1 Historical Land Cover ................................................................................................................. 30 3.4.2 Impervious Surfaces ................................................................................................................... 31 3.4.3 Wetlands .................................................................................................................................... 34 3.4.4 Open Space ................................................................................................................................ 36 3.5 Water Resource Conditions .............................................................................................................. 41 3.5.1 Watershed Drainage System ...................................................................................................... 41 3.5.2 Physical Stream Conditions ........................................................................................................ 43 3.5.3 Stormwater Detention Basins .................................................................................................... 49 3.5.4 Groundwater Evaluation ............................................................................................................ 51 3.5.5 Surface Water Quality ................................................................................................................ 54 3.5.6 Citizen Reporter Web Application ............................................................................................. 60 3.6 Pollutant Sources .............................................................................................................................. 61 3.6.1 Nonpoint Sources ....................................................................................................................... 61 3.6.2 Point Sources ............................................................................................................................. 68 2 3.7 Land Management Practices ............................................................................................................. 69 3.7.1 Conservation Easement Programs ............................................................................................. 69 3.7.2 Local Ordinances ........................................................................................................................ 70 3.7.3 Local Planning Documents ......................................................................................................... 70 4. Watershed Protection Measures ........................................................................................................ 71 4.1 Best Management Practices & Programs ......................................................................................... 71 4.1.1 BMP Projects .............................................................................................................................. 71 4.1.2 BMP Programs ........................................................................................................................... 76 4.1.3 Watershed-Wide BMP Projects & Programs ............................................................................. 77 4.1.4 Site-Specific BMP Projects ......................................................................................................... 78 4.2 Planning, Policy & Programming ....................................................................................................... 85 4.2.1 Open Space Protection .............................................................................................................. 85 4.2.2 Align Ordinances with Best Practices ......................................................................................... 85 4.2.3 Watershed Planning ................................................................................................................... 85 4.3 Public Information, Education & Outreach ....................................................................................... 85 4.4 Summary of BMP Projects & Programs ............................................................................................ 86 4.5 Summary of Pollutant Loads & Potential BMP Pollutant Load Reductions ...................................... 87 4.6 Funding Opportunities ...................................................................................................................... 88 5. Implementation of Watershed Plan ....................................................................................................... 91 5.1 Implementation Schedule ................................................................................................................. 92 5.2 Interim Measurable Milestones ........................................................................................................ 92 5.3 Criteria for Determining Progress ..................................................................................................... 93 5.4 Monitoring to Evaluate Effectiveness ............................................................................................... 94 List of Acronyms .......................................................................................................................................... 96 3 Figures Figure 1 Klein Creek ...................................................................................................................................... 6 Figure 2 Klein Creek Watershed’s location within the West Branch DuPage River Watershed ................... 7 Figure 3 Municipal boundaries within the Klein Creek Watershed .............................................................. 8 Figure 4 Klein Creek Watershed .................................................................................................................... 9 Figure 5 Sub-watersheds in Klein Creek Watershed ................................................................................... 10 Figure 6 Klein Creek Watershed Steering Committee members meet to discuss the plan ........................ 11 Figure