Vermont

The Vermont Stormwater Management Manual Volume I – Stormwater Treatment Standards

StateVermonthighNo

Open source PDF ↗Official agency page ↗

Document Metadata

Jurisdiction level

state

“Vermont Agency of Natural Resources”
Title Page

State

Vermont

“VT Relay Service”
Title Page

Version / edition

DRAFT March 1, 2016

“DRAFT March 1, 2016”
Title Page

Adoption / effective date

Not found in document

No evidence cited

Last revised date

2016-03-01

“DRAFT March 1, 2016”
Title Page

Relationship to state manual

independent

“This manual was produced to provide technical analysis and design guidance for the Vermont Agency of Natural Resources Stormwater Management Program.”
1-1

Design Criteria

Design storm return periods (years)

1-year, 10-year, 100-year

“1-year 24 hour storm... 10-year storm... 100-year storm”
2-2

Water quality volume method

WQv = (P)(Rv)(A) / 12, where P = 1.0 inch, Rv = 0.05 + 0.009(I), I = percent impervious, A = site area in acres.

“WQv = (P)(Rv)(A) / 12”
2-7

Peak flow calculation method(s)

NRCS Runoff methods, Watershed Lag Method, TR-55, TR-20

“The Watershed Lag Method shall be used for determination of peak rates”
2-13

Required hydrologic/hydraulic software

TR-55, TR-20, HECRAS

“The models TR-55 and TR-20 (or approved equivalent) will be used for determining peak discharge rates”
2-14

Approved BMP categories

Pre-Treatment Practices, Non-Structural Practices, Structural Stormwater Treatment Practices, Alternative Stormwater Treatment Practices

“Pre-Treatment Practices, Non-Structural Practices, Structural Stormwater Treatment Practices”
Table of Contents