Stormwater Management Standards Manual - Toledo Metropolitan ...

More documents

Recommendations

Info

TMACOG STORMWATER MANAGEMENT STANDARDS MANUAL THIRD EDITION SEPTEMBER 2008 ACKNOWLEDGMENTS Thank you to the members of the Stormwater Action Group for their dedication and hard work in preparing this manual, and in particular to Jason Sisco of the Wood County Engineer’s Office, Marcus Ricci of the Lucas Soil and Water Conservation District, and Travis Andres, TMACOG intern and University of Toledo Graduate Student. This document was prepared with funding from members of the TMACOG Stormwater Coalition. Cover image: Image Science and Analysis Laboratory, NASA — Johnson Space Center 10 July 2006. “Astronaut Photography of Earth — Display Record.: http://weol.jsc.nasa.gov/scripts/sseop/photo.pl Third Edition Stormwater Standards Manual September 2008 Page 2
TABLE OF CONTENTS FIGURES ..........................................................................................................................................................................14 TABLES ............................................................................................................................................................................15 EXECUTIVE SUMMARY ..............................................................................................................................................16 CHAPTER 1 - INTRODUCTION...................................................................................................................................19 1.0 CHAPTER SUMMARY..........................................................................................................................................19 1.1 PURPOSE OF THE MANUAL AND REVISION ITEMS ..............................................................................................19 1.3 IMPACTS OF DEVELOPMENT ON WATER QUANTITY...........................................................................................21 1.3.1 Changes in Watershed Hydrology ................................................................................................................22 1.3.2 Changes in Stream Morphology ...................................................................................................................22 1.4 IMPACTS OF DEVELOPMENT ON WATER QUALITY .............................................................................................23 1.5 FRAMEWORK FOR DESIGN OF STORMWATER MANAGEMENT SYSTEMS .............................................................23 1.5.1 Nonstructural Controls.................................................................................................................................26 1.5.2 Structural Controls .......................................................................................................................................26 CHAPTER 2 – STORMWATER MANAGEMENT SUBMITTAL REQUIREMENTS...........................................28 2.0 CHAPTER SUMMARY..........................................................................................................................................28 2.1 PROCEDURES.....................................................................................................................................................28 2.2 DEFINITIONS OF DISTURBANCE, CONSTRUCTION ACTIVITY, AND DEVELOPMENT .............................................28 2.2.1 Disturbance: .....................................................................................................................................................28 2.2.2 Construction Activity: .......................................................................................................................................28 2.2.3 Development: ....................................................................................................................................................29 2.3 EXEMPTIONS FROM THESE STANDARDS..............................................................................................................29 2.4 DISTURBANCE IN FLOODPLAINS, FLOODWAYS OR WETLANDS ..........................................................................29 2.5 SITE PLAN APPROVAL PROCESS.........................................................................................................................30 2.5.1 Submittal Requirements for Site Plans.........................................................................................................30 2.5.2 Additional Submittal Requirements for Site Plans Greater than 100 Acres .................................................31 2.6 CONTACT INFORMATION FOR LOCAL JURISDICTIONS.........................................................................................33 CHAPTER 3 – RUNOFF REDUCTION HIERARCHY AND PERFORMANCE CRITERIA FOR RUNOFF AND RETENTION...........................................................................................................................................................38 3.0 CHAPTER SUMMARY..........................................................................................................................................38 3.1 INTRODUCTION ..................................................................................................................................................38 3.2 RUNOFF REDUCTION HIERARCHY......................................................................................................................39 3.2.1 Non-Structural Controls ...............................................................................................................................39 3.2.2 Structural Controls .......................................................................................................................................40 3.3 RUNOFF CALCULATIONS....................................................................................................................................42 3.3.1 Development of 100 acres or less ................................................................................................................42 3.3.2 Development greater than 100 acres............................................................................................................45 3.3.3 Downstream Analysis ...................................................................................................................................46 3.4 CONTROL VOLUMES ..........................................................................................................................................47 3.5 DRAINAGE STRUCTURES....................................................................................................................................47 3.5.1 Pumps ...............................................................................................................................................................47 3.5.2 Capacity............................................................................................................................................................48 Third Edition Stormwater Standards Manual September 2008 Page 3
Page 4 and 5: 3.5.3 Drainage Structure Location .
Page 6 and 7: 8.2.2 Regulatory Floodway..........
Page 8 and 9: GROUND WATER TABLE ................
Page 10 and 11: TN ................................
Page 12 and 13: Flow Around Ends ..................
Page 14 and 15: FIGURES Figure 1-1 Effects of Urban
Page 16 and 17: Executive Summary The Stormwater Co
Page 18 and 19: Chapter 8: Regulatory Floodplain an
Page 20 and 21: has taken 30 years to start to iden
Page 22 and 23: 1.3.1 Changes in Watershed Hydrolog
Page 24 and 25: A well-designed plan requires consi
Page 26 and 27: 1.5.1 Nonstructural Controls Nonstr
Page 28 and 29: CHAPTER 2 - Stormwater Management S
Page 30 and 31: applications. These regulations are
Page 32 and 33: • Description of how the Runoff R
Page 34 and 35: Lucas County Lucas County Engineer
Page 36 and 37: Township of Richfield 3951 Washburn
Page 38 and 39: CHAPTER 3 - RUNOFF REDUCTION HIERAR
Page 40 and 41: keeping stormwater pollution out of
Page 42 and 43: Schueler, T. R., Site Planning for
Page 44 and 45: Rainfall Intensities in Inches/Hour
Page 46 and 47: f. HEC-RAS used for FEMA Studies 3.
Page 48 and 49: 3.5.2 Capacity Storm sewers should
Page 50 and 51: a. All materials should be of such
Page 52 and 53:
4.1.1 Exclusions: Activities that a
Page 54 and 55:
• Total area of the site and the
Page 56 and 57:
stabilization, vegetative buffer st
Page 58 and 59:
The sediment settling pond volume c
Page 60 and 61:
for roads or utilities), the projec
Page 62 and 63:
SWP3 is adequate, or whether additi
Page 64 and 65:
work best in gently sloping areas (
Page 66 and 67:
function by slowing runoff velociti
Page 68 and 69:
Sand filtration systems are most be
Page 70 and 71:
limited to a height of 18 inches. T
Page 72 and 73:
Example of a Perimeter Sand Filter
Page 74 and 75:
5.3 Runoff Treatment 5.3.1 Bioreten
Page 76 and 77:
Site Applicability Bioretention is
Page 78 and 79:
Introducing Runoff Runoff must be i
Page 80 and 81:
Plan View Of A Bioretention Cell Fi
Page 82 and 83:
Underdrain Gravel Underdrain gravel
Page 84 and 85:
Type Botanical Name Common Name F T
Page 86 and 87:
• The cell is draining properly a
Page 88 and 89:
General Applicability Land Area Con
Page 90 and 91:
energy of the inflow. Stone riprap
Page 92 and 93:
Maintenance Maintenance Agreement A
Page 94 and 95:
5.3.3 Wet Detention Ponds Wet deten
Page 96 and 97:
Minimal Water Supply To avoid drawd
Page 98 and 99:
Sediment Removal Sediment removal i
Page 100 and 101:
5.3.4 Dry Extended Detention Basins
Page 102 and 103:
Riser Design Hoods or trash racks s
Page 104 and 105:
Example of a Dry Extended Detention
Page 106 and 107:
CHAPTER 6 - ILLICIT DISCHAGE DETECT
Page 108 and 109:
Should be the same agency as tracin
Page 110 and 111:
Sewer Conversion: Areas that were o
Page 112 and 113:
6.4.2 Dry Weather Field Screening T
Page 114 and 115:
6.5.1 Local Agency Contact Informat
Page 116 and 117:
CHAPTER 7 - Riparian Setbacks _____
Page 118 and 119:
Floodplains perform crucial roles,
Page 120 and 121:
are ecologically compatible and emp
Page 122 and 123:
yards, recycling facilities, quarri
Page 124 and 125:
8.2 Lands Subject to These Control
Page 126 and 127:
more than 1.0 foot. (Some jurisdict
Page 128 and 129:
• Be consistent with the need to
Page 130 and 131:
• Category 1 - wetlands are consi
Page 132 and 133:
eissued (extended), and revoked fro
Page 134 and 135:
Oak Openings Region Boundary Figure
Page 136 and 137:
Authorized representatives of local
Page 138 and 139:
Base Flood The flood having one per
Page 140 and 141:
1. Dry Detention Basin A basin that
Page 142 and 143:
Fill Added earth that is designed t
Page 144 and 145:
Infiltration The absorption of wate
Page 146 and 147:
Ohio Rapid Assessment Method A mult
Page 148 and 149:
Regulatory Floodway The channel and
Page 150 and 151:
Soil and Water Conservation Distric
Page 152 and 153:
Temporary Soil Erosion and Sediment
Page 154 and 155:
Appendix B: Best Management Practic
Page 156 and 157:
Example of Matting Installation Fig
Page 158 and 159:
Description Applying a protective l
Page 160 and 161:
6. Permanent Seeding Description Pe
Page 162 and 163:
Design Guidelines Site Preparation
Page 164 and 165:
Example of a Sediment Trap Figure A
Page 166 and 167:
Safety Sediment basins shall be con
Page 168 and 169:
Example of a Sediment Basin Figure
Page 170 and 171:
Example of Silt Fence Installation
Page 172 and 173:
Examples of Inlet Protection Techni
Page 174 and 175:
Example of Construction Entrance Fi
Page 176 and 177:
Maintenance Mud spilled, dropped, w
Page 178 and 179:
Figure Appendix B- 9 Example of Str
Page 180 and 181:
summary of the activities the juris
Page 182 and 183:
Riparian Resolution for Township RI
Page 184 and 185:
Riparian Resolution for Township SE
Page 186 and 187:
Riparian Resolution for Township 26
Page 188 and 189:
Riparian Resolution for Township 1.
Page 190 and 191:
Riparian Resolution for Township ap
Page 192 and 193:
Riparian Resolution for Municipalit
Page 194 and 195:
Page 196 and 197:
Page 198 and 199:
Page 200 and 201:
Page 202 and 203:
Conservation Development for Townsh
Page 204 and 205:
Page 206 and 207:
Page 208 and 209:
Conservation Development for Munici
Page 210 and 211:
Page 212 and 213:
Page 214 and 215:
Lucas County Stormwater Quality Rul
Page 216 and 217:
Sediment and Erosion Control Ordina
Page 218 and 219:
Page 220 and 221:
Page 222 and 223:
Page 224 and 225:
Page 226 and 227:
Page 228 and 229:
Page 230 and 231:
Page 232 and 233:
Page 234 and 235:
Page 236 and 237:
Page 238 and 239:
Illicit Discharge & Illegal Connect
Page 240 and 241:
Page 242 and 243:
Page 244 and 245:
Page 246:
show all

Stormwater Management Standards Manual - Toledo Metropolitan ...

Create successful ePaper yourself

Delete template?

Save as template?