rhode island stormwater design and installations standards ... · •s tandard 6 – refer to...
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Rhode Island Stormwater Design and Installations
Standards ManualPublic WorkshopHow to Use the Revised Manual
January 13, 2011
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Horsley Witten Group, Inc.Horsley Witten Group, Inc.
Designers
Who Should Use the Manual?
Property Owners
Regulatory Reviewers
Municipal Officials
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Horsley Witten Group, Inc.Horsley Witten Group, Inc.
Steps to Designing an Approvable Stormwater System
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Horsley Witten Group, Inc.Horsley Witten Group, Inc.
Steps 1 and 2
• What criteria are relevant to your project?
• Other local ordinances to consider?
• Topography• Drainage area delineations• Soil, groundwater, geologic
constraints• Zoning restrictions
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Steps 3 and 4
• What volume requirements must be met? (Rev, WQv, CPv, Qp)
• What BMPs can be used?
• Incorporate LID into your project at the initial design stages, before building layouts are finalized
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Steps 5 and 6
• Develop conceptual design• Coordinate with review
agencies• Collect more data and
revise as necessary
• Move forward with a design that meet standards 1-9
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Horsley Witten Group, Inc.Horsley Witten Group, Inc.
Important Sections of the Manual Relevant to Each Standard
• Standard 1 – refer to Chapt. 3.3.1, Chapt. 4, and Appendix A
• Standard 2 – refer to Chapt. 3.3.2, Chapt. 4.6 (SW Credit), Chapt. 5, App. F (specs) and App. H.1 (soil testing)
• Standard 3 – refer to Chapt. 3.3.3, Chapt. 4.6 (SW Credit), Chapt. 5, Chapt. 6, App. B (landscaping), App. F (specs), App. H.3 (pollutant loading analyses), and App. J (TAP)
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Horsley Witten Group, Inc.Horsley Witten Group, Inc.
Cont’d
• Standard 4 – refer to Chapt. 3.3.4, Chapt. 5 & 7, App. D (design exmp), App. H.4 (short-cut sizing), App. I (River/Stream Order), and App. K (H/H Modeling Guidance)
• Standard 5 – refer to Chapt. 3.3.5 and 3.3.6, Chapt. 5 & 7, App. D, App. I (River/Stream Order), and App. K (H/H Modeling Guidance)
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Cont’d
• Standard 6 – refer to Chapt. 3.2.6, App. C (retrofit options)
• Standard 7 –App. G (Pollution prevention and source control)
• Standard 8 – refer to Tables 3-2 and 3-3, Chapt. 5
• Standard 9 –Chapt. 3.2.9
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Steps 7 and 8
• Develop appropriate ESC plan to meet standard 10
• Develop appropriate O&M plan to meet standard 11
• Specific requirements in Chapters 5-7
• Add’l guidance in App. E
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Step 9
• Final Plan meeting all requirements
Refer to Appendix A throughout design process
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Horsley Witten Group, Inc.Horsley Witten Group, Inc.
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