“Development” under these rules shall refer to all human-induced changes to improved or unimproved

Water Quality Regulations Permitting Process This summary is intended to provide general information about Clean Water Services’ water quality regulations. However, it is not a substitute for the regulations themselves. If you have any questions or concerns about how these new regulations may affect you, please contact Clean Water Services for additional information. Clean Water Services (the District) is a service district formed under ORS Chapter 451 with lead responsibility for urban surface water management in urban Washington County, including all of the incorporated cities. To better protect water quality within its service district, the District has adopted rules that affect how and where “development” can occur by requiring Vegetated Corridors, enhancement, and mitigation for impacts to “Water Quality Sensitive Areas”. Water Quality Sensitive Areas are land features which serve as water quality filtering systems, protect aquatic communities, or otherwise function to improve the water quality and quantity management of the storm and surface water system, and include any drainage system with a basin greater than 10 acres, wetlands, rivers, streams, springs, lakes and ponds. However, various types of man-made stormwater facilities are not considered “Sensitive Areas”. The “Vegetated Corridor” is a corridor adjacent to a Sensitive Area that is preserved and maintained to protect the water quality functions of the Sensitive Areas. When ...