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Calculating the WQCV and Volume Reduction Chapter 3 The same calculation is then performed using the effective imperviousness for the 100-year event: V 100 I 100−yr Effective = −0.00005501 ∙ I 2 100−yr Effective + 0.030148 ∙ I 100−yr Effective − 0.12 12 ft 3 ∙ Total Area ∙ 43560 ac ∙ ft V 100 I 100−yr Effective = (−0.00005501 ∙ 47%2 + 0.030148 ∙ 47% − 0.12) ∙ 1.15 ac ∙ 43560 12 = 4865 ft 3 The reduction in the 100-year storage volume, as a result of the conveyance-based BMPs in Sub-basin A, is 5083 ft 3 – 4865 ft 3 = 218 ft 3 , a reduction of approximately 4.3%. Calculations for Sub-basin E include the following: V 100 I Total = −0.00005501 ∙ I 2 Total + 0.030148 ∙ I Total − 0.12 ∙ Total Area ∙ 43560 12 V 100 I Total = (−0.00005501 ∙ 73%2 + 0.030148 ∙ 73% − 0.12) 12 ∙ 0.15 ac ∙ 43560 ft 3 ac ∙ ft ft 3 ac ∙ ft ft 3 = 977 ft3 ac ∙ ft The same calculation is then performed using the effective imperviousness for the 100-year event: V 100 I 100−yr Effective = −0.00005501 ∙ I 2 100−yr Effective + 0.030148 ∙ I 100−yr Effective − 0.12 12 ft 3 ∙ Total Area ∙ 43560 ac ∙ ft V 100 I 100−yr Effective = (−0.00005501 ∙ 69%2 + 0.030148 ∙ 69% − 0.12) ∙ 0.15 ac ∙ 43560 12 = 927 ft 3 The reduction in the 100-year storage volume as a result of the volume-based BMPs in Sub-basin E is, therefore, 977ft 3 – 927 ft 3 = 50 ft 3 , a reduction of approximately 5%. ft 3 ac ∙ ft 3-30 Urban Drainage and Flood Control District August 2011 Urban Storm Drainage Criteria Manual Volume 3
Chapter 3 Calculating the WQCV and Volume Reduction Figure 3-11. Colorado Green Development DCIA, UIA, RPA, and SPA August 2011 Urban Drainage and Flood Control District 3-31 Urban Storm Drainage Criteria Manual Volume 3
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Urban Storm Drainage Criteria Manua
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Table of Contents Urban Storm Drain
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Disclaimer Attention all persons us
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Preface 1.0 Acknowledgements The Ur
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Preface 2.0 Purpose Volume 3 of the
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Preface • Glossary: A glossary is
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Preface fps ft FHWA GB GS H:V HSG F
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Chapter 1 Stormwater Management and
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Stormwater Management and Planning
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Page 43: Chapter 2 BMP Selection Contents 1.
Page 46 and 47: BMP Selection Chapter 2 area is too
Page 48 and 49: BMP Selection Chapter 2 provided by
Page 50 and 51: BMP Selection Chapter 2 Table 2-2.
Page 52 and 53: BMP Selection Chapter 2 1.4 Storage
Page 54 and 55: BMP Selection Chapter 2 1.8 Online
Page 56 and 57: BMP Selection Chapter 2 reflect the
Page 58 and 59: BMP Selection Chapter 2 Figure 2-2.
Page 60 and 61: BMP Selection Chapter 2 3.0 Life Cy
Page 62 and 63: BMP Selection Chapter 2 5.0 Referen
Page 64 and 65: Figure 3-15. Colorado Green Impervi
Page 66 and 67: Calculating the WQCV and Volume Red
Page 101: Chapter 4 Treatment BMPs Contents 1
Page 104 and 105: Treatment BMPs Chapter 4 2.0 Treatm
Page 106 and 107: Treatment BMPs Chapter 4 3.0 Refere
Page 109 and 110: Grass Buffer T-1 4. Buffer Slope: T
Page 111 and 112: Grass Buffer T-1 Turf grasses such
Page 113 and 114: Grass Buffer T-1 Figure GB-2. Typic
Page 115: Grass Buffer T-1 References Barrett
Page 118 and 119: T-2 Grass Swale • Provide access
Page 120 and 121: T-2 Grass Swale 8. Underdrain: An u
Page 122 and 123: T-2 Grass Swale Figure GS-1. Grass
Page 124 and 125: T-2 Grass Swale References Chow, Ve
Page 126: T-3 Bioretention Site Selection Bio
Page 130 and 131: T-3 Bioretention Table B-1. Class 1
Page 133 and 134: Bioretention T-3 Pipe Diameter Tabl
Page 135 and 136: Bioretention T-3 6. Inlet/Outlet Co
Page 137 and 138: Bioretention T-3 Table B-6. Native
Page 139 and 140: Bioretention T-3 Figure B-1 - Typic
Page 141 and 142: Bioretention T-3 November 2010 Urba
Page 143 and 144: Bioretention T-3 Figure B-2. Geomem
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Bioretention T-3 Construction Examp
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Bioretention T-3 Design Example The
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Bioretention T-3 Design Procedure F
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T-4 Green Roof reduction benefits o
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T-4 Green Roof Figure GR-1. Typical
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Green Roof T-4 6. Planting Method:
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Green Roof T-4 Additional Design Gu
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Green Roof T-4 Colorado Examples Th
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Extended Detention Basin (EDB) T-5
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T-5 Extended Detention Basin (EDB)
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T-6 Sand Filter adjacent structures
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T-6 Sand Filter 5. Impermeable Geom
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T-6 Sand Filter Figure SF-1. Sand F
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T-6 Sand Filter Design Examples The
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Retention Pond T-7 Description A re
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Retention Pond T-7 H = depth of sur
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Retention Pond T-7 Aesthetic Design
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Retention Pond T-7 Design Example F
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Retention Pond T-7 Design Procedure
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Retention Pond T-7 References Bedie
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T-8 Constructed Wetland Pond be des
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T-8 Constructed Wetland Pond Figure
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T-8 Constructed Wetland Pond Design
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T-8 Constructed Wetland Pond Refere
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T-9 Constructed Wetland Channel A c
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T-9 Constructed Wetland Channel Fig
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Permeable Pavement Systems T-10 Des
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Permeable Pavement Systems T-10 •
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Permeable Pavement Systems T-10 inf
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Permeable Pavement Systems T-10 3.
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Permeable Pavement Systems T-10 Fig
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Permeable Pavement Systems T-10 Tab
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Permeable Pavement Systems T-10 con
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Permeable Pavement Systems T-10 No-
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Permeable Pavement Systems T-10 Des
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Permeable Interlocking Concrete Pav
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Concrete Grid Pavement T-10.2 Note:
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Pervious Concrete T-10.3 This BMP F
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T-10.4 Porous Gravel Designing for
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T-10.5 Reinforced Grass Designing f
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T-11 Underground BMPs Underground B
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T-11 Underground BMPs • Traffic L
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T-11 Underground BMPs Design Proced
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T-11 Underground BMPs • Wisconsin
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T-11 Underground BMPs For these rea
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T-12 Outlet Structures Orifice Plat
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T-12 Outlet Structures 100 A t / A
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T-12 Outlet Structures Table OS-3a.
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T-12 Outlet Structures Outlet Geome
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T-12 Outlet Structures Figure OS-2.
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Chapter 5 Source Control BMPs Conte
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Source Control BMPs Chapter 5 Table
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Source Control BMPs Chapter 5 • P
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Source Control BMPs Chapter 5 • S
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Source Control BMPs Chapter 5 5.0 R
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S-1 Covering Outdoor Storage and Ha
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S-2 Spill Prevention, Containment a
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S-2 Spill Prevention, Containment a
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S-3 Disposal of Household Waste •
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S-3 Disposal of Household Waste •
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S-4 Illicit Discharge Controls •
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Good Housekeeping S-5 Description G
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Good Housekeeping S-5 purchase orde
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Vehicle Maintenance, Fueling and St
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Vehicle Maintenance, Fueling and St
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S-8 Use of Pesticides, Herbicides a
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S-8 Use of Pesticides, Herbicides a
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Landscape Maintenance S-9 Descripti
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Landscape Maintenance S-9 • When
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Landscape Maintenance S-9 • Maint
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S-10 Snow and Ice Management o o Di
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S-10 Snow and Ice Management • Do
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S-11 Street Sweeping and Cleaning a
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S-12 Storm Sewer System Cleaning Fr
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BMP Maintenance Chapter 6 party res
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BMP Maintenance Chapter 6 with comm
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BMP Maintenance Chapter 6 4.5 Irrig
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BMP Maintenance Chapter 6 root syst
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BMP Maintenance Chapter 6 9.4 Mosqu
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BMP Maintenance Chapter 6 11.2 Debr
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BMP Maintenance Chapter 6 • Filte
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Construction BMP Fact Sheets Map Sy
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Chapter 7 Construction BMPs 1.0 Int
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Chapter 7 Construction BMPs 2.2 Sed
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Chapter 7 Construction BMPs Table 7
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Chapter 7 Construction BMPs o o The
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Chapter 7 Construction BMPs • Fin
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Chapter 7 Construction BMPs such as
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Chapter 7 Construction BMPs Pre-Con
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Chapter 7 Construction BMPs 4.1 Ero
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Construction BMPs Chapter 7 4.4 Mat
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Construction BMPs Chapter 7 • Slo
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Construction BMPs Chapter 7 • Pro
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Construction BMPs Chapter 7 constru
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Construction BMPs Chapter 7 Service
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Construction BMPs Chapter 7 When se
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Construction BMPs Chapter 7 • Tre
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Construction BMP Plan Symbols MS-2
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Construction BMP Plan Symbols MS-4
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Surface Roughening (SR) EC-1 Descri
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Surface Roughening (SR) EC-1 Novemb
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Temporary and Permanent Seeding (TS
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Soil Binders (SB) EC-3 Description
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Soil Binders (SB) EC-3 Factors to c
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Soil Binders (SB) EC-3 Installation
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Mulching (MU) EC-4 Description Mulc
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Compost Blanket and Filter Berm (CB
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Compost Blanket and Filter Berm (CB
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Rolled Erosion Control Products (RE
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EC-7 Temporary Slope Drains (TSD) M
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EC-7 Temporary Slope Drains (TSD) S
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EC-8 Temporary Outlet Protection (T
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Rough Cut Street Control (RCS) EC-9
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Rough Cut Street Control (RCS) EC-9
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EC-10 Earth Dikes and Drainage Swal
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EC-10 Earth Dikes and Drainage Swal
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Terracing (TER) EC-11 Description T
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Check Dams (CD) EC-12 Description C
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Check Dams (CD) EC-12 November 2010
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Check Dams (CD) EC-12 November 2010
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Streambank Stabilization (SS) EC-13
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Wind Erosion/Dust Control (DC) EC-1
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MM-1 Concrete Washout Area (CWA) se
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MM-1 Concrete Washout Area (CWA) CW
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MM-2 Stockpile Management (SM) When
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MM-2 Stockpile Management (SM) SP-4
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MM-2 Stockpile Management (SM) SP-6
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MM-3 Good Housekeeping Practices (G
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SC-1 Silt Fence (SF) Maintenance an
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SC-1 Silt Fence (SF) SF-4 Urban Dra
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SC-2 Sediment Control Log (SCL) Alt
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SC-2 Sediment Control Log (SCL) SCL
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Straw Bale Barrier (SBB) SC-3 Descr
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Straw Bale Barrier (SBB) SC-3 Novem
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SC-4 Brush Barrier (BB) Maintenance
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SC-5 Rock Sock (RS) RS-2 Urban Drai
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Inlet Protection (IP) SC-6 Descript
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Inlet Protection (IP) SC-6 • Remo
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Inlet Protection (IP) SC-6 August 2
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Inlet Protection (IP) SC-6 August 2
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Sediment Basin (SB) SC-7 Descriptio
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Sediment Basin (SB) SC-7 Illustrati
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Sediment Basin (SB) SC-7 August 201
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Sediment Basin (SB) SC-7 August 201
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SC-8 Sediment Trap (ST) ST-2 Urban
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Vegetated Buffers (VB) SC-9 Descrip
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SC-10 Chemical Treatment (CT) Maint
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SM-1 Construction Phasing/Sequencin
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SM-1 Construction Phasing/Sequencin
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SM-2 Protection of Existing Vegetat
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Construction Fence (CF) SM-3 Descri
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Construction Fence (CF) SM-3 Novemb
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SM-4 Vehicle Tracking Control (VTC)
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Stabilized Staging Area (SSA) SM-6
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Stabilized Staging Area (SSA) SM-6
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Street Sweeping and Vacuuming (SS)
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SM-8 Temporary Diversion Methods (T
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Dewatering Operations (DW) SM-9 Des
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Dewatering Operations (DW) SM-9 Nov
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Dewatering Operations (DW) SM-9 Nov
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SM-10 Temporary Stream Crossing (TS
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SM-11 Temporary Batch Plant (TBP) A
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Glossary 1 Note: This glossary is n
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Effluent Limitation Guidelines (ELG
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Low Impact Development (LID): LID i
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Revised Universal Soil Loss Equatio
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Bibliography Altitude Training Asso
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Bibliography U.S. Environmental Pro
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Bibliography Metcalf and Eddy, Inc.
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Bibliography Water Environment Fede
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