Design & Construction Standards

Clean Water Services' Design and Construction Standards describe the administrative and technical requirements for the design and construction of residential or commercially developed sanitary and surface water management systems, erosion control methods and vegetated corridors. 

  • To request a CD of the complete Design and Construction Standards for $10.00, please call 503.681.5100

Design & Construction Standards Update

Standards are periodically revised to incorporate changes in permits, and to reflect new technologies, approaches and development patterns. Clean Water Services is currently conducting a two-phase update, with Phase 1 completed in March 2017 and Phase 2 continuing until April 2019. Learn more about the process, timeline and key topics.

In March 2017, the Board approved Resolution & Order 17-05, which adopted Phase 1 revisions to the Standards. Projects submitted for plan review on or after April 22, 2017 will be reviewed using the Standards adopted in R&O 17-05. Projects submitted for plan review prior to April 22, 2017 will be reviewed using the Standards adopted by R&O 07-20

Current Design & Construction Standards - R&O 17-05

R&O 17-05 & Table of Contents
Chapters
  • Chapter 1 (PDF, 80KB) - General Requirements and Administrative Provisions
  • Chapter 2 (PDF, 118KB) - Administrative Procedures 
  • Chapter 3 (PDF, 257KB) - Sensitive Areas and Vegetated Corridors
  • Chapter 4 (PDF, 114KB) - Runoff Treatment and Control
  • Chapter 5 (PDF, 101KB) - Conveyance Design
  • Chapter 6 (PDF, 63KB) - Erosion Prevention and Sediment Control
  • Chapter 7 (PDF, 49KB) - General Construction Specifications
  • Chapter 8 (PDF, 112KB) - Technical Specifications for Conveyance Systems
  • Chapter 9 (PDF, 2343KB) - Wastewater Pump Stations and Force Mains
  • Chapter 10 (PDF, 17KB) - Septic Tank Effluent Pump (STEP) Systems
Appendix A - Planting Requirements
  • Appendix A (PDF, 58KB) - Planting Requirements
Appendix B - Standard Details

Resources 

Low Impact Development Approaches Handbook

Clean Water Services and its partners completed the Low Impact Development Approaches (LIDA) Handbook to promote sustainable development practices for the Tualatin River Watershed in 2009. The LIDA Handbook is a supplement to the Clean Water Services' Design and Construction Standards and is to be used in conjunction with the Standards, other applicable regulations and local codes. 

Erosion Control Manual 

Receive news on what we are doing in the community and our innovative solutions to continue on providing clean water.