Yamhill Basin Agricultural Water Quality Management Area Plan Developed by the: The Oregon Department of Agriculture With support from the: Yamhill Local Advisory Committee and The Yamhill Soil and Water Conservation District The Polk Soil and Water Conservation District December 2017 Yamhill Basin Management Area Contacts: Oregon Department of Agriculture Natural Resource Programs 635 Capitol Street NE Salem, OR 97301 (503)-986-4700 ODA Yamhill Basin Agricultural Water Quality Specialist Office: (503)-986-5141 Link to Area Plan: www.oregon.gov/ODA/programs/NaturalResources/AgWQ/Pages/AgWQPlans.aspx Yamhill SWCD 2200 SW 2nd Street McMinnville, OR 97128 Phone: (503) 472-1474 http://www.yamhillswcd.org/ Polk SWCD 580 Main Street, Suite A Dallas, OR 97338 Phone: (503) 623- 9680 ext. 101 www.polkswcd.com Yamhill Agricultural Water Quality Management Area Plan December 2017 Page ii Table of Contents Acronyms and Terms Used in this Document .........................................................................i Foreword ........................................................................................................................................ 1 Required Elements of Area Plans ............................................................................................. 1 Plan Content ................................................................................................................................... 1 Chapter 1: Agricultural Water Quality Management Program Purpose and Background 3 1.1 Purpose of Agricultural Water Quality Management Program and Applicability of Area Plans .................................................................................................................................................. 3 1.2 History of the Ag Water Quality Program .............................................................................. 3 1.3 Roles and Responsibilities .......................................................................................................... 4 1.3.1 Oregon Department of Agriculture .......................................................................................................... 4 1.3.2 Local Management Agency ........................................................................................................................... 7 1.3.3 Local Advisory Committee ............................................................................................................................ 7 1.3.4 Agricultural Landowners .............................................................................................................................. 7 1.3.5 Public Participation .......................................................................................................................................... 8 1.4 Agricultural Water Quality ....................................................................................................... 8 1.4.1 Point and Nonpoint Sources of Water Pollution ............................................................................... 8 1.4.2 Beneficial Uses and Parameters of Concern ........................................................................................ 8 1.4.3 Impaired Water Bodies and Total Maximum Daily Loads ........................................................... 9 1.4.4 Oregon Water Pollution Control Law – ORS 468B.025 and ORS 468B.050 ........................ 9 1.4.5 Streamside Vegetation and Agricultural Water Quality ............................................................. 10 1.5 Other Water Quality Programs ............................................................................................. 11 1.5.1 Confined Animal Feeding Operation Program ................................................................................ 12 1.5.2 Groundwater Management Areas .......................................................................................................... 12 1.5.3 The Oregon Plan for Salmon and Watersheds................................................................................. 12 1.5.4 Pesticide Management and Stewardship ........................................................................................... 12 1.5.5 Drinking Water Source Protection ........................................................................................................ 13 1.6 Partner Agencies and Organizations ..................................................................................... 13 1.6.1 Oregon Department of Environmental Quality ............................................................................... 13 1.6.2 Other Partners ................................................................................................................................................. 14 1.7 Measuring Progress .................................................................................................................. 14 1.7.1 Measurable Objectives ................................................................................................................................ 14 1.7.2 Land Conditions and Water Quality ...................................................................................................... 15 1.7.3 Focused Implementation in Small Geographic Areas .................................................................. 15 1.8 Monitoring, Evaluation, and Adaptive Management ......................................................... 16 1.8.1 Agricultural Water Quality Monitoring ............................................................................................... 16 1.8.2 Biennial Reviews and Adaptive Management ................................................................................. 17 Chapter 2: Local Background .............................................................................................. 18 2.1 Local Roles ................................................................................................................................. 18 2.1.1 Local Advisory Committee (LAC) ........................................................................................................... 18 2.1.2 Local Management Agency ........................................................................................................................ 19 2.2 Area Plan and Area Rules: Development and History ....................................................... 19 2.3 Geographic and Physical Setting ........................................................................................... 19 2.4 Water Quality ............................................................................................................................ 26 2.4.1 Water Quality Concerns .............................................................................................................................. 26 Yamhill Agricultural Water Quality Management Area Plan December 2017 Page iii 2.4.2 Beneficial Uses ................................................................................................................................................. 26 2.4.3 WQ Parameters and 303(d) List ............................................................................................................. 27 2.4.4 Total Maximum Daily Loads (TMDL) and Agricultural Load Allocations ......................... 27 2.5 Prevention and Control Measures ......................................................................................... 28 2.5.1 Prevention and Control Measure #1 - Erosion and Sediment ................................................ 30 2.5.2 Prevention and Control Measure #2 - Irrigation ........................................................................... 31 2.5.3 Prevention and Control Measure #3 - Waste ................................................................................... 32 2.5.4 Prevention and Control Measure #4 - Nutrients............................................................................ 33 2.5.5 Prevention and Control Measure #5 - Pesticides .......................................................................... 34 2.5.6 Prevention and Control Measure #6 - Chemigated Irrigation Water .................................. 36 2.5.7 Prevention and Control Measure #7 - Roads, Staging Areas, and Farmsteads .............. 37 2.5.8 Prevention and Control Measure #8 - Streamside Areas .......................................................... 37 Chapter 3: Strategic Plan to Achieve Area Plan Goals .................................................. 41 Mission ..................................................................................................................................................... 41 Strategies for Area Plan Implementation........................................................................................... 41 3.1 Goals and Objectives of the Area Plan.................................................................................. 41 3.1.1 Goals and Objectives of the Yamhill Basin Area Plan................................................................... 41 3.2 Activities for Area Plan Implementation .............................................................................. 42 3.2.1 Community and Landowner Engagement ......................................................................................... 43 3.2.2 Technical Assistance ..................................................................................................................................... 44