LIDA Handbook

Low Impact Development Approaches (LIDAs) such as rain gardens, vegetated swales, porous pavement and the other facilities can help maximize a site’s potential to treat stormwater.

Clean Water Services and its partners completed the Low Impact Development Approaches Handbook to promote sustainable development practices for Tualatin River Watershed in 2009. Low Impact Development Approaches (LIDAs) can maximize a site's potential by reducing or incorporating the area needed for stormwater management and water quality treatment while protecting natural resources and habitat.

The LIDA Handbook is a supplement to Clean Water Services' Design and Construction Standards and is to be used in conjunction with the Standards and other applicable regulations and local codes. The colorful handbook explains the benefits of LIDA, site planning and the design process. Fact sheets illustrate rain gardens, vegetated swales, porous pavement, and the other types of facilities with detailed information about effective design, planting and maintenance. Included are inspection checklists, detail drawings, a glossary, and links to additional resources. Web-based to facilitate updates, the handbook also presents photos of attractive examples within the Tualatin Basin.

The LIDA Handbook is a collaborative product of the Tualatin Basin Natural Resources Coordinating Committee; which includes the land use jurisdictions in urban Washington County and Clean Water Services (the District), Tualatin Hills Park and Recreation District, and Metro. The District, County, and Cities manage stormwater runoff to meet public needs and comply with strict water quality regulations set for the Tualatin River basin by the Oregon Department of Environmental Quality.

Download by Section

Introduction, Site Planning, Design Process
LIDA Fact Sheets
Operation and Maintenance Plans
Detail Drawings

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