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T-12 Outlet Structures Table OS-3a. Trash Rack Sizing for 2" High Rectangular Orifices and Large (> 1-1/4”) Circular Orifices Width of 2” Height Rectangular Orifice or Diameter of Circular Orfice (in) Minimum Width of Trash Rack Opening (W opening ) as a Function of Water Depth H Above Lowest Perforation H=2.0 ft. H=3.0 ft. H=4.0 ft. H=5.0 ft. H=6.0 ft. Spacing of Bearing Bars, Cross Rods 2 1.7 ft 2.1 ft 2.4 ft 2.5 ft. 2.7 ft 1-3/16”, 2” < 2.5 2.2 ft 2.6 ft 3 ft 3.2 ft 3.4 ft 1-3/16”, 2” < 3.0 2.6 ft 3.2 ft 3.5 ft 3.8 ft 4.0 ft 1-3/16”, 2” < 3.5 3.0 ft 3.7 ft 4.1 ft 4.5 ft 4.7 ft 1-3/16”, 2” < 4.0 3.4 ft 4.2 ft 4.7 ft 5.1 ft 5.4 ft 1-3/16”, 2” < 4.5 3.6 ft 4.4 ft 4.9 ft 5.3 ft 5.6 ft 1-3/16”, 4” < 5.0 4.0 ft 4.8 ft 5.4 ft 5.9 ft 6.2 ft 1-3/16”, 4” < 5.5 4.4 ft 5.3 ft 6.0 ft 6.5 ft 6.8 ft 1-3/16”, 4” < 6.0 4.8 ft 5.8 ft 6.5 ft 7 ft 7.4 ft 1-3/16”, 4” < 6.5 5.2 ft 6.3 ft 7.1 ft 7.6 ft 8.1 ft 1-3/16”, 4” < 7.0 5.6 ft 6.8 ft 7.6 ft 8.2 ft 8.7 ft 1-3/16”, 4” < 7.5 6 ft 7.3 ft 8.2 ft 8.8 ft 9.3 ft 1-3/16”, 4” < 8.0 6.4 ft 7.8 ft 8.7 ft 9.4 ft 9.9 ft 1-3/16”, 4” < 8.5 6.8 ft 8.2 ft 9.2 ft 10 ft * 1-3/16”, 4” < 9.0 7.2 ft 8.7 ft 9.8 ft * * 1-3/16”, 4” < 9.5 7.6 ft 9.2 ft * * * 1-3/16”, 4” < 10.0 8 ft 9.7 ft * * * 1-3/16”, 4” < 10.5 8.3 ft * * * * 1-3/16”, 4” < 11.0 8.7 ft * * * * 1-3/16”, 4” < 11.5 9.1 ft * * * * 1-3/16”, 4” < 12.0 9.5 ft * * * * 1-3/16”, 4” * Size trash rack per Figure OS-1. Use 4-inch high staggered rectangular orifices to limit size of the structure. Notes: 1. Width shown based on Figure OS-1 assuming inundation of well screen into the permanent pool 2'-4". 2. This table provides the minimum opening in the concrete not the minimum width of the well screen. Ensure the well screen is wide enough to properly attach to the structure. OS-6 Urban Drainage and Flood Control District August 2013 Urban Storm Drainage Criteria Manual Volume 3
Outlet Structures T-12 Table OS-3b. Trash Rack Specifications for 2” High Rectangular Orifices Water Depth Above Minimum Bearing Bar Size, Lowest Opening, H (ft) Bearing Bars Aligned Vertically (in) 2.0' 1” x 3/16” 3.0' 1-1/4” x 3/16” 4.0' 1-3/4” x 3/16” 5.0' 2” x 3/16” 6.0' 2-1/4” x 3/16” August 2013 Urban Drainage and Flood Control District OS-7 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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Chapter 2 BMP Selection Contents 1.
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BMP Selection Chapter 2 area is too
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BMP Selection Chapter 2 provided by
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BMP Selection Chapter 2 Table 2-2.
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BMP Selection Chapter 2 1.4 Storage
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BMP Selection Chapter 2 1.8 Online
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BMP Selection Chapter 2 reflect the
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BMP Selection Chapter 2 Figure 2-2.
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BMP Selection Chapter 2 3.0 Life Cy
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BMP Selection Chapter 2 5.0 Referen
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Figure 3-15. Colorado Green Impervi
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Calculating the WQCV and Volume Red
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Chapter 4 Treatment BMPs Contents 1
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Treatment BMPs Chapter 4 2.0 Treatm
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Treatment BMPs Chapter 4 3.0 Refere
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Grass Buffer T-1 4. Buffer Slope: T
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Grass Buffer T-1 Turf grasses such
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Grass Buffer T-1 Figure GB-2. Typic
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Grass Buffer T-1 References Barrett
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T-2 Grass Swale • Provide access
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T-2 Grass Swale 8. Underdrain: An u
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T-2 Grass Swale Figure GS-1. Grass
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T-2 Grass Swale References Chow, Ve
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T-3 Bioretention Site Selection Bio
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T-3 Bioretention Table B-1. Class 1
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Bioretention T-3 Pipe Diameter Tabl
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Bioretention T-3 6. Inlet/Outlet Co
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Bioretention T-3 Table B-6. Native
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Bioretention T-3 Figure B-1 - Typic
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Bioretention T-3 November 2010 Urba
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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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Page 251: Pervious Concrete T-10.3 This BMP F
Page 254 and 255: T-10.4 Porous Gravel Designing for
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Page 258 and 259: T-11 Underground BMPs Underground B
Page 260 and 261: T-11 Underground BMPs • Traffic L
Page 262 and 263: T-11 Underground BMPs Design Proced
Page 264 and 265: T-11 Underground BMPs • Wisconsin
Page 266 and 267: T-11 Underground BMPs For these rea
Page 268 and 269: T-12 Outlet Structures Orifice Plat
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Page 300 and 301: S-3 Disposal of Household Waste •
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Page 304 and 305: S-4 Illicit Discharge Controls •
Page 307 and 308: Good Housekeeping S-5 Description G
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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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