2021 Surface Water Design Manual

As part of the City’s yearly update to the Bothell Design and Construction Standards and Specifications, we have also updated Bothell’s Surface Water Design Manual, which is listed as Appendix B in the Standards. View the Surface Water Design Manual as a PDF.*

When using the Surface Water Design Manual, be sure to also read Chapter 4 in the Bothell Design and Construction Standards and Specifications.

*For projects submitted before 2017 

You may use the previous version of the Surface Water Design Manual if your project meets both of these criteria:

• Your complete project application was accepted prior to December 30, 2016; and
• Your project will be under construction prior to January 1, 2022.