Alabama

Erosion Control, Sediment Control and Stormwater Management on Construction Sites and Urban Areas (The Blue Book)

StateAlabamahighNo

Open source PDF ↗Official agency page ↗

Document Metadata

Jurisdiction level

state

“in the State of Alabama”
Page ix, Introduction

State

Alabama

“Montgomery, Alabama”
Title Page

Version / edition

July 2022, Volume 1, Revision No. 5

“Volume 1... 2022... This major revision No. 5 of July 2022”
Title Page; Page ix

Adoption / effective date

2022-07

“July 2022”
Title Page

Last revised date

2022-07

“A concerted effort has been made to make the July 2022 Blue Book an accurate and comprehensive handbook”
Page i, Foreword

Relationship to state manual

independent

“The Alabama Handbook for Erosion Control, Sediment Control and Stormwater Management on Construction Sites and Urban Areas (The Blue Book)”
Page ix

Design Criteria

Design storm return periods (years)

2-year, 5-year, 10-year, 25-year, 50-year, 100-year

“Temporary Construction Areas 2-year... Building Sites 5-year... Agricultural Land 10-year... Isolated Buildings 25-year... Urban areas, Residential, School, Industrial Areas, etc. 50-year”
Page 181, Table DV-1

Water quality volume method

First-flush capture: the first 1 inch of runoff carries 90% of the pollution load from a storm (USGS, 1984); detention storage volume can be tied to a first flush capture of the initial 0.1 to 1 inch of runoff, with basin drawdown times of 30–40 hours for pollutant removal.

“the first flush equates to the first 1" of runoff which carries 90% of the pollution load from a storm (USGS, 1984)”
Page 9, Chapter 2

Peak flow calculation method(s)

NRCS runoff curve number (RCN) method, Rational method, TR-55, Urban Hydrology for Small Watersheds

“The peak rate of runoff should be determined using the Natural Resources Conservation Service runoff curve number (RCN) method or other equivalent methods.”
Page 181, Diversion

Required hydrologic/hydraulic software

USDA-NRCS Engineering Field Tools (EFT)

“Software for the design of a diversion can be found in the USDA-NRCS Engineering Field Tools (EFT).”
Page 183, Diversion

Approved BMP categories

Site Preparation, Surface Stabilization, Runoff Conveyance, Sediment Control, Stormwater Management, Stream Protection, Bioretention Area, Porous Pavement, Stormwater Detention Basin

“Site Preparation... Surface Stabilization... Runoff Conveyance... Sediment Control... Stormwater Management... Stream Protection”
Table of Contents, Pages vii–viii