Revised Stormwater Manual

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Effective April 2025 - Revised Stormwater Manual (SWM)

The Revised Stormwater Manual table of contents is listed below with links to various sections of the document. Questions about content and requirements may be directed to Jana Stewart at 336-373-2055.

Download the Entire Stormwater Manual - 4 MB

SWM Cover Page

Table of Contents

Introduction

Part A
A-1: North Carolina’s Stormwater Requirements
A-2: Soils
A-3: Vegetation
A-5: Common SCM Design Elements
A-7: SCM Inspection and Maintenance
A-8: Selecting the Right SCM
A-9: Vegetated Setbacks

Part B
Calculations Guidance

Part C
C-0: MDC for all SCMs
C-1: Infiltration System
C-2: Bioretention
C-3: Wet Ponds
C-4: Stormwater Wetlands
C-5: Permeable Pavement Systems
C-6: Sand Filter
C-7: Rainwater Harvesting
C-8: Green Roof
C-9: Level Spreader – Filter Strips
C-10: Disconnected Impervious Surface
C-11: Treatment Swale
C-12: Dry Ponds

Part D
D-1: StormFilter
D-2: Silva Cell Suspended Pavement with Bioretention
D-3: Filterra
D-4: BayFilter

Appendix 1: Underground Detention System
Appendix 2: Greensboro City Resources and Stormwater Management Links
Appendix 3: Depth-Duration-Frequency Table for Greensboro, NC
Appendix 4: SCM Design Check List
Appendix 5: SCM Certification Requirements
Appendix 6: SCM Inspection and Maintenance Check List
Appendix 7: Stormwater SCM Bonding Process
Appendix 8: Recommended Guidance for Riser and Barrel Spillway Discharge Characteristics and
Flood Routing
Appendix 9: Evaluation of Wet Detention Basin Not Holding Water

Link to State BMP Manual

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