New York State

STORMWATER MANAGEMENT DESIGN MANUAL

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Other manuals in New York: City of Albany, City of Buffalo / Buffalo Sewer Authority, City of Rochester, City of Syracuse, City of Yonkers, New York, New York City, New York State

Document Metadata

Jurisdiction level

State

“New York State Department of Environmental Conservation”
Title Page

State

New York

“DAM SAFETY SECTION 50 WOLF ROAD ALBANY, NEW YORK 12233-3507 --- page 369 --- GUIDELINES FOR DESIGN OF DAMS TABLE OF CONTENTS SECTION TITLE PAGE Preface to the January 1 1989 Edition 1 Introduction 2 Gravity Dams Modification 2 Definitions 3 3 Hazard Classification 5 4 De”
pp. 363–370

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Relationship to state manual

independent

“The New York State Stormwater Design Manual is prepared to provide standards for the design of the Stormwater Management Practices”
Preface

Design Criteria

Design storm return periods (years)

1-year, 2-year, 10-year, 100-year

“1-year, 2-year, 10-year, and 100-year”
Table 4.1

Water quality volume method

90% Rule: WQv (acre-feet) = (P * Rv * A) / 12, where Rv = 0.05 + 0.009(I)

“Water Quality Volume (WQv) 90% Rule: WQv (acre-feet) = (P ∙ Rv ∙ A) / 12 Rv = 0.05+0.009(I) I = Impervious Cover (Percent) P(inches) = 90% Rainfall Event Number (See Figure 4.1) 2 A = Contributing Area (acres) Runoff Reduction Volume (RRv) RRv (acre-feet) = Reduction of”
p. 43

Peak flow calculation method(s)

TR-55, TR-20

“TR-55 and TR-20 (or approved equivalent) shall be used to determine peak discharge rates.”
Section 4.6

Hydrologic/hydraulic software

USDA NRCS TR20, HydroCAD, Pond Pack, StormCAD, Hydraflow, HEC-HMS

“Hydraulic and hydrologic modeling software, such as USDA NRCS TR20, HydroCAD, Pond Pack, StormCAD, Hydraflow, and Hydrologic Engineering Center Hydrologic Modeling System (HEC-HMS) and others, shall be used”
Section 4.9

Approved BMP categories

Stormwater Ponds, Stormwater Wetlands, Infiltration Practices, Filtering Practices, Open Channel Practices

“Acceptable practices are divided into five groups, including: I. Stormwater Ponds... II. Stormwater Wetlands... III. Infiltration Practices... IV. Filtering Practices... V. Open Channel Practices”
Section 3.3.1