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References

TABLE 1: REFERENCES TO THE 2012 SWMMWW THAT RELATE TO RAIN GARDENS

QUESTION 2012 SWMMWW REFERENCE
1. What are the Minimum Requirements Volume I, Chapter 2 – Minimum Requirements for New and Redevelopment , pages 2-1 to 2-2
in the SWMMWW?

2. When do Minimum Requirements #1 Volume I, Chapter 2, Section 2.4—Applicability of the Minimum Requirements, pages 2-9 to 2-15
through #5 Apply?
Volume I, Chapter 2, Section 2.5—Minimum Requirements, Minimum Requirements #1 through #5 pages 2-16 to 2-32

3. How do Rain Gardens fit into Volume I, Section 2.5.5 Minimum Requirement #5: On-Site Stormwater Management, pages 2-28 to 2-32.
Minimum Requirement #5?
4. Are there locations where a Rain Volume V, Section 7.4 BMPs for Infiltration and Bioretention Treatment, BMP T7.30: Bioretention Cells, Swales and
Garden is “infeasible” for Minimum Planter Boxes
Requirement #5? • Infeasibility Criteria, pages 7-7 to 7-9

• Other Site Suitability Factors, pages 7-9 to 7-10

5. What types of site analyses are Volume I, Chapter 3.1 Stormwater Site Plans: Step-By-Step, pages 3-1 to 3-16
required for Rain Gardens used to help
meet Minimum Requirement #5? Volume III, Section 3.4 Stormwater-related Site Procedures and Design Guidance for Bioretention and Permeable
Pavement, pages 3-103 to 3-106.

Volume III, Section 3.3.6 Saturated Hydraulic Conductivity – Guidelines and Criteria, pages 3-75 to 3-83.
6. How is a Rain Garden sized to meet Volume V, Section 5.3 Best Management Practices for On-Site Stormwater Management, BMP T5.14A: Rain
Minimum Requirement #5? Gardens, pages 5-11 to 5-12.

LINKS TO RESOURCES
To Download the 2012 SWMMWW visit: http://www.ecy.wa.gov/programs/wq/stormwater/manual.html

For more information on the Municipal Stormwater Permits visit: http://www.ecy.wa.gov/programs/wq/stormwater/municipal/index.html
To see if your city or county is covered under a Municipal Stormwater Permit visit: http://www.ecy.wa.gov/programs/wq/stormwater/
municipal/MuniStrmWtrPermList.html
The Municipal Stormwater Permits contain specific requirements for cities and counties to inspect rain gardens. Recent Guidance was
provided in the Western Washington Low Impact Development (LID) Operation and Maintenance (O&M) Document. To download this
document visit: http://www.ecy.wa.gov/programs/wq/stormwater/municipal/LID/TRAINING/LIDO&MGuidanceDocument.pdf