Tennessee Department of Environment and Conservation

Tennessee Permanent Stormwater Management and Design Guidance Manual

StateTennesseehighNo

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Other manuals in Tennessee: Metropolitan Nashville and Davidson County

Document Metadata

Jurisdiction level

state

“Tennessee Department of Environment and Conservation Division of Water Resources”
Title Page

State

Tennessee

“Tennessee”
Title Page

Version / edition

First Edition

“First Edition”
Title Page

Adoption / effective date

2014-12-01

“December 2014”
Title Page

Last revised date

Not found in document

No evidence cited

Relationship to state manual

independent

“prepared by the Tennessee Department of Environment and Conservation, Division of Water Resources”
Acknowledgements

Design Criteria

Design storm return periods (years)

1-year, 2-year, 5-year, 10-year, 25-year, 100-year

“Typically, a 10-year or 25-year return design storm is used to size storm sewer systems... Similarly, a 2-year or 5-year return design storm is used to protect from downstream... Additionally, a 100-year return design storm is used to protect from downstream flooding”
Chapter 4, Section 4.5

Water quality volume method

Infiltrate, evapotranspirate, harvest and/or use the first inch of every rainfall event preceded by 72 hours of dry weather.

“designed, built, and maintained to infiltrate, evapotranspirate, harvest and/or use, the first inch of every rainfall event preceded by 72 hours of dry weather.”
Chapter 2, Section 2.2

Peak flow calculation method(s)

Rational Method, SCS Curve Number Approach

“SCS Curve Number Approach (Hann et al., 1994)”
Chapter 6, Section 6.1

Required hydrologic/hydraulic software

Tennessee Runoff Reduction Assessment Tool (TNRRAT)

“Tennessee Runoff Reduction Assessment Tool (TNRRAT)”
Chapter 6, Section 6.1

Approved BMP categories

Dry Detention, Wet Ponds, Vegetated Swale (Water Quality Swale), Managed Vegetated Areas (Urban Forest, Grassland and Riparian Buffers), Filter Strips, Bioretention, Urban Bioretention, Infiltration Areas (Impervious Area Disconnection), Permeable Pavement, Green Roofs, Rainwater Harvesting, Stormwater Treatment Wetlands, Manufactured/Proprietary Treatment Devices

“5.4.1 Dry Detention 5.4.2 Wet Ponds 5.4.3 Vegetated Swale (Water Quality Swale) 5.4.4 Managed Vegetated Areas 5.4.5 Filter Strips 5.4.6 Bioretention 5.4.6a Urban Bioretention 5.4.7 Infiltration Areas 5.4.8 Permeable Pavement 5.4.9 Green Roofs 5.4.10 Rainwater Harvesting 5.4.11 Stormwater Treatment Wetlands 5.4.12 Manufactured/Proprietary Treatment Devices”
Chapter 5, Section 5.4