Washington State University & Puget Sound Partnership Permeable Pavement LID Workshop Operations and Maintenance
The basics on permeable pavement installation and maintenance. (2014) PowerPoint presentation by Kathryn Gwilym of SvR Design Company.
Article: Permeable Pavements – Reduce Runoff thru Pervious Layers
(2012) This article was researched and developed by Cascadia Consulting Group on behalf of the Washington Department of Ecology.