Southern Willamette Valley Agricultural Water Quality Management Area Plan March 28, 2019 Developed by the Oregon Department of Agriculture Southern Willamette Valley Local Advisory Committee With support from the Upper Willamette Soil and Water Conservation District Oregon Department of Agriculture Upper Willamette SWCD Water Quality Program 780 Bailey Hill Road, Suite #5 635 Capitol St. NE Eugene, OR 97402 Salem, OR 97301 Phone: (541) 650-3052 Phone: (503) 986-4700 [email protected] https://oda.direct/AgWQPlans Southern Willamette Valley Agricultural Water Quality Management Area Plan March 28, 2019 Table of Contents Acronyms and Terms Used in this Document ............................................................................ i Foreword .......................................................................................................................................... iii Required Elements of Area Plans ............................................................................................... iii Plan Content ..................................................................................................................................... iii Chapter 1: Agricultural Water Quality Management Program Purpose and Background ......................................................................................................................................1 1.1 Purpose of Agricultural Water Quality Management Program and Applicability of Area Plans..................................................................................................................................................... 1 1.2 History of the Ag Water Quality Program .............................................................................. 1 1.3 Roles and Responsibilities ......................................................................................................... 2 1.3.1 Oregon Department of Agriculture .............................................................................................................. 2 1.3.2 Local Management Agency ............................................................................................................................... 5 1.3.3 Local Advisory Committee ................................................................................................................................ 5 1.3.4 Agricultural Landowners .................................................................................................................................. 5 1.3.5 PuBlic Participation .............................................................................................................................................. 6 1.4 Agricultural Water Quality ........................................................................................................ 6 1.4.1 Point and Nonpoint Sources of Water Pollution ................................................................................... 6 1.4.2 Beneficial Uses and Parameters of Concern ............................................................................................ 6 1.4.3 Impaired WaterBodies and Total Maximum Daily Loads (TMDLs) ............................................ 7 1.4.4 Oregon Water Pollution Control Law – ORS 468B.025 and ORS 468B.050 ............................ 7 1.4.5 Streamside Vegetation and Agricultural Water Quality .................................................................... 8 1.5 Other Water Quality Programs ................................................................................................. 9 1.5.1 Confined Animal Feeding Operation Program ....................................................................................... 9 1.5.2 Groundwater Management Areas .............................................................................................................. 10 1.5.3 The Oregon Plan for Salmon and Watersheds..................................................................................... 10 1.5.4 Pesticide Management and Stewardship ............................................................................................... 10 1.5.5 Drinking Water Source Protection ............................................................................................................ 11 1.6 Partner Agencies and Organizations ..................................................................................... 11 1.6.1 Oregon Department of Environmental Quality ................................................................................... 11 1.6.2 Other Partners ..................................................................................................................................................... 12 1.7 Measuring Progress ................................................................................................................... 12 1.7.1 MeasuraBle OBjectives ..................................................................................................................................... 12 1.7.2 Land Conditions and Water Quality .......................................................................................................... 12 1.7.3 Focused Implementation in Small Geographic Areas ...................................................................... 13 1.8 Monitoring, Evaluation, and Adaptive Management ........................................................ 14 1.8.1 Agricultural Water Quality Monitoring ................................................................................................... 14 1.8.2 Statewide Aerial Photo Monitoring of Streamside Vegetation ................................................... 14 1.8.3 Biennial Reviews and Adaptive Management ..................................................................................... 14 Chapter 2: Local Background ................................................................................................. 17 2.1 Local Roles and Responsibilities ............................................................................................ 18 2.1.1 Local Advisory Committee ............................................................................................................................. 18 2.1.2 Local Management Agency ............................................................................................................................ 18 2.2 Area Plan and Rules: Development and History ................................................................ 18 2.3 Geographical and Physical Setting ......................................................................................... 18 2.4 Agricultural Water Quality ...................................................................................................... 24 Southern Willamette Valley Agricultural Water Quality Management Area Plan March 28, 2019 2.4.1 Water Quality Issues ......................................................................................................................................... 24 2.4.2 Basin TMDLs and Agricultural Load Allocations ............................................................................... 25 2.4.3 Sources of Impairment .................................................................................................................................... 27 2.5 Voluntary and Regulatory Measures ..................................................................................... 27 2.5.1 Riparian/Streamside Area Management ............................................................................................... 28 2.5.2 Soil Erosion Prevention and Control ........................................................................................................ 29 2.5.3 Pesticides ................................................................................................................................................................ 29 2.5.4 Mercury ................................................................................................................................................................... 29 2.5.5 Optional Issues: Upland, Irrigation, and Livestock Management .............................................. 30 2.5.6 Menu of Optional Management Practices .............................................................................................. 30 Chapter 3: Strategic Initiatives .............................................................................................. 35 3.1 Measurable Objectives .............................................................................................................. 35 3.1.1 Management Area .............................................................................................................................................. 35 3.1.2 Focus Area(s) ........................................................................................................................................................ 35 3.1.3 Strategic Implementation Area ................................................................................................................... 36 3.2 Strategies and Activities ........................................................................................................... 38 3.2.1 Education and Outreach.................................................................................................................................. 38 3.2.2 Technical Assistance ........................................................................................................................................