Erosion and Sediment Pollution Control Program Manual.pdf

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Adapted from USDA-NRCS Figure 6.2 “n” Values for Riprap Channels 363-2134-008 / March 31, 2012 / Page 138
TABLE 6.10 Maximum Permissible Velocities <strong>and</strong> Shear Stresses for Reno Mattress <strong>and</strong> Gabions Rock Fill Permissible Permissible Thickness Gradation Velocity Shear Stress Type n Inches (in) (fps) (lb/ft 2 ) Reno .026 - .030 6 3 - 6 6.0 4.27 Mattress .026 - .030 9 3 - 6 12.0 4.58 .026 - .030 12 3 - 6 15.0 4.73 Gabion .028 - .030 18 4 - 6 18.0 5.20 .029 - .032 36 5 - 9 22.0 8.35 Adapted from Maccaferri Gabions, Inc. 5. Calculate the Required Freeboard. Determine whether stable or unstable flow conditions exist. Uniform flow at or near “critical depth” is unstable due to waves present at the water’s surface. Since the height of the waves may exceed the top of the channel, sufficient freeboard should be provided to prevent channel failure. The procedure for determining whether channel flow conditions are stable or unstable is as follows: Compute the channel’s critical slope: Sc = 14.56 n 2 Dm / R 4/3 Where: Sc = critical slope (ft/ft) n = Manning’s “n” Dm = mean depth of flow = A/T (ft) A = cross-sectional area of the channel (sq. ft.) T = channel top width at the water surface (ft) R = hydraulic radius = A/P (ft) P = wetted perimeter (ft) Unstable flow occurs when 0.7Sc < So < 1.3Sc Where: So = channel bed slope. Compute the minimum required freeboard. If unstable flow conditions exist, compute the minimum required freeboard as follows: F = (0.025 V) (3 D) = 0.075 VD Where: F = minimum freeboard in feet V = velocity in fps D = flow depth in feet For stable flow conditions, the minimum freeboard should be 25% of the flow depth. The minimum freeboard for any channel is 6”. 6. Provide suitable outlet protection for all channels. See outlet protection section of this manual. 363-2134-008 / March 31, 2012 / Page 139
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EROSION AND SEDIMENT POLLUTION CONT
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FOREWORD The various Best Managemen
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TABLE OF CONTENTS Page Foreword ...
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Waterbars .........................
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Table Number Name Page 11.4 Recomme
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Figure Number Name Page 7.7 Graphic
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STANDARD CONSTRUCTION DETAILS Numbe
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CHECKLISTS, STANDARD E&S WORKSHEETS
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are cases where sheet flow has occu
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is replaced following earthmoving,
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CHAPTER 1 - REQUIRED E&S PLAN CONTE
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topography of the site should be in
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efore earth disturbance occurs with
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is classified as High Quality (HQ)
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install the proposed perimeter BMPs
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detail(s) for the specific BMP. In
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CHAPTER 3 - SITE ACCESS This chapte
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ROCK CONSTRUCTION ENTRANCE WITH WAS
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RUMBLE PAD Pre-constructed rumble p
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3 feet should be avoided wherever p
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WATERBAR - Sediment Removal Efficie
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BROAD-BASED DIP - Sediment Removal
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USDA Forest Service STANDARD CONSTR
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DITCH RELIEF CULVERT (Cross Drains)
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TURNOUT - Sediment Removal Efficien
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STANDARD CONSTRUCTION DETAIL #3-11
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3. Temporary bridges should be inst
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PA DEP STANDARD CONSTRUCTION DETAIL
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WETLAND CROSSING Wetland crossings
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Adapted from PA DEP GP-8 FIGURE 3.8
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FIGURE 3.10 Rigid or Flexible Pipe
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PA DEP FIGURE 3.12 In-stream Coffer
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EARTHWORK WITHIN LAKES AND PONDS NO
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FIGURE 3.15 Turbidity Barrier Insta
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DEWATERING WORK AREAS - Wherever wa
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(Additional Notes for Standard Cons
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SITE HOUSEKEEPING AND MATERIALS MAN
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Prefabricated Washout Containers Ca
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CHAPTER 4 - SEDIMENT BARRIERS AND F
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The maximum slope length above a co
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STANDARD CONSTRUCTION DETAIL #4-1 C
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COMPOST FILTER BERM - Sediment Remo
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Installation - Compost filter berms
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STANDARD CONSTRUCTION DETAIL # 4-4
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ROCK FILTER OUTLET - Sediment Remov
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York County Conservation District 3
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Wherever there is a break or change
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A chain link fence should be instal
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SEDIMENT FILTER LOG (FIBER LOG) - S
Page 107 and 108: WOOD CHIP FILTER BERM - Sediment Re
Page 109 and 110: STRAW BALE BARRIER - Sediment Remov
Page 111 and 112: NRCS FIGURE 4.4 Straw Bale Barrier
Page 113 and 114: A one foot thick layer of AASHTO #5
Page 115 and 116: The total width of the filter strip
Page 117 and 118: INLET FILTER BAG - Sediment Removal
Page 119 and 120: STANDARD CONSTRUCTION DETAIL # 4-16
Page 121 and 122: Adapted from Maine DEP Maximum drai
Page 123 and 124: PA DEP STANDARD CONSTRUCTION DETAIL
Page 129 and 130: TABLE 5.1 Pennsylvania Rainfall by
Page 131 and 132: LAND USE < 2% TABLE 5.2 Runoff Coef
Page 133 and 134: TR-55 Shallow Concentrated Flow Tha
Page 135 and 136: Figure 5.2 - RAINFALL REGION MAP A
Page 137 and 138: Figure 5.6 - RAINFALL REGION MAP E
Page 139 and 140: TABLE 5.6 5-Minute through 24-Hour
Page 141 and 142: TABLE 5.8 5-Minute through 24-Hour
Page 143 and 144: Drainage Area (A) - Determine the d
Page 145 and 146: Determination of Time of Concentrat
Page 147 and 148: CHAPTER 6 - RUNOFF CONVEYANCE BMPs
Page 149 and 150: DESIGN PROCEDURE 1. Calculate the r
Page 151 and 152: TABLE 6.3 Manning’s “n” for T
Page 153 and 154: National Technical Information Serv
Page 155 and 156: TABLE 6.6 Riprap Gradation, Filter
Page 157: TABLE 6.9 Recommended n Values to b
Page 161 and 162: It should be noted that Guernsey si
Page 163 and 164: Channel #1 (Diversion Channel) on W
Page 165 and 166: Channel #1 Segments “A” and “
Page 167 and 168: No more than one third of the shoot
Page 169 and 170: Stackhouse Bensinger, Inc. STANDARD
Page 171 and 172: Adapted from North Carolina DENR ST
Page 173 and 174: TEMPORARY SLOPE PIPE - Temporary sl
Page 177 and 178: BENCH - Benches (a.k.a. gradient te
Page 179 and 180: CHAPTER 7 - SEDIMENT BASINS DESIGN
Page 181 and 182: 14. The discharge from a sediment b
Page 183 and 184: Adapted from VA SWCC PA DEP FIGURE
Page 185 and 186: Develop a Stage Storage Curve. Use
Page 189 and 190: Sediment shall be removed from the
Page 193 and 194: FIGURE 7.2 Skimmer Orifice Design C
Page 195 and 196: The principal spillway should be an
Page 197 and 198: Adapted from USDA, NRCS FIGURE 7.3
Page 199 and 200: H TABLE 7.3 - PIPE FLOW CAPACITY n
Page 207 and 208: TABLE 7.4 Concrete Base Requirement
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Embedded section of aluminum or alu
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Wherever total basin dewatering is
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Riprap at toe of embankment shall b
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Head TABLE 7.6 - GRASS-LINED EMERGE
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4. Once the depth of flow through t
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Anti-seep Collar Wherever soils sus
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4. The maximum spacing between coll
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Adapted from PennDOT RC-70 STANDARD
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FILTER DIAPHRAGM Filter diaphragms
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Sediment Storage Zone Dewatering Pr
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4. Greater surface area increases t
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Barrel/Riser Sediment Trap - This d
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Accumulated sediment shall be remov
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Wherever total trap dewatering is r
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At a minimum, outlet protection sho
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CHAPTER 9 - OUTLET PROTECTION As a
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FIGURE 9.1 Velocity Adjustment Nomo
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endwall. For discharges directly in
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STANDARD CONSTRUCTION DETAIL # 9-2
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Adapted from USDA NRCS STANDARD CON
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Adapted from USDA - NRCS FIGURE 9.3
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Determine whether maximum or minimu
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Adapted from ScourStop FIGURE 9.5 T
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STILLING BASIN (Plunge Pool) - Stil
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Adapted from USDOT, FHWA HEC 14 FIG
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Using the pipe slope (V:H) determin
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ENERGY DISSIPATER Energy dissipater
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EARTHEN LEVEL SPREADER LOCATION - E
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STRUCTURAL LEVEL SPREADER LOCATION
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The E&S plan should include such in
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Wherever the slope parallels the ro
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VA SWCC FIGURE 11.1 Stair Step Grad
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TOPSOIL APPLICATION Graded areas sh
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Site conditions such as soil limita
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Species Warm-Season Grasses Deerton
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6. Use only in extreme southeastern
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Synthetic binders, or chemical bind
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EROSION CONTROL BLANKETS - There ar
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HYDRAULICALLY APPLIED BLANKETS Hydr
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PAM Specifications Anionic PAM mixt
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Adapted from VA DSWC FIGURE 11.5 So
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City of Portland, BDS FIGURE 11.6 T
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CHAPTER 13 - UTILITY LINE PROJECTS
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more viable. HDD may be considered
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STANDARD CONSTRUCTION DETAIL #13-1
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PA DEP FIGURE 13.1 Waterbar Install
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The following points should be cons
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SKID ROADS AND SKID TRAILS The prim
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The diversion channel should have a
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PA Timber Harvesting Packet FIGURE
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CHAPTER 15 - STREAMBANK STABILIZATI
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Figure 15.1 Riprap Streambank Prote
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GABIONS and Reno mattress have been
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PA DEP FIGURE 15.4 Reno Mattress St
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Adapted from VA DSWC FIGURE 15.5 Gr
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MISCELLANEOUS HARD ARMOR TECHNIQUES
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Natural colonization by surrounding
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INSTALLATION GUIDELINES Prepare the
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Branchpacking is the alternating of
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Fabric encapsulated soil is often u
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Fiber rolls, or coir logs, are cyli
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CHAPTER 16 - GRADING STANDARDS PA D
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CHAPTER 17 - AREAS OF SPECIAL CONCE
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Adapted from USDA NRCS FIGURE 17.2
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Adapted from USDA NRCS FIGURE 17.4
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enter the Act 2 Program, which is a
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No RECOMMENDED PROCESS FOR SITES WI
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Common Contaminants of Concern: Two
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Structural (Stabilization) Erosion
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ii. The siting and function of any
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SPECIAL PROTECTION WATERSHEDS Sourc
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impacts, including suitability of g
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SLOPE FAILURES PA DEP The Problem I
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TABLE 17.1 PROCESSES LEADING TO LAN
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GEOTHERMAL WELL DRILLING Source Unk
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Well (or Total Well Field) Flows Gr
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Project: COMPLETE PLAN CHECKLIST A.
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STANDARD E&S CONTROL PLAN TECHNICAL
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“A maintenance program, which pro
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Complies Deficient N/A Hydric soils
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Complies Deficient N/A Removal of t
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Complies Deficient N/A Standard E&S
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Sediment Traps (Chapter 8) Complies
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Permanent Stabilization Topsoil rep
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APPENDIX B - STANDARD E&S WORKSHEET
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STANDARD E&S WORKSHEET #2 Compost F
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STANDARD E&S WORKSHEET # 4 Reinforc
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STANDARD E&S WORKSHEET # 6 Super Si
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STANDARD E&S WORKSHEET # 8 Rock Fil
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STANDARD E&S WORKSHEET # 10 Rationa
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STANDARD E&S WORKSHEET # 12 Sedimen
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E L E V A T I O N (FT) STANDARD E&S
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STANDARD E&S WORKSHEET # 16 Sedimen
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BASIN NO. TEMP. OR PERM. Y (FT) Z S
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STANDARD E&S WORKSHEET # 20 Riprap
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STANDARD E&S WORKSHEET # 22 PLAN PR
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15. Until the site is stabilized, a
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APPENDIX D - STANDARDS FOR MAPS AND
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PLAN DRAWINGS Each bit of informati
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e carefully preserved and stored fo
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SOIL NAME CUTBANKS CAVE CORROSIVE T
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ROUGHNESS ELEMENT DISSIPATER - This
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2. Determine Discharge Velocity (VO
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From Figure F.8, VA/VO = 1.05 VA =
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Yo / D FIGURE F.4 Dimensionless Rat
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USDOT, FHWA HEC 14 FIGURE F.6 Flow
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FIGURE F.8 Average Velocity in Abru
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FIGURE F.10 Average Depth for Abrup
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FIGURE F.12 Riprap Size for Use Dow
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EXAMPLE - Given: Circular Concrete
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USDOT, FHWA HEC 14 FIGURE F.14 Impa
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designed to discharge all anticipat
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Figure G.1. Convex Contours and Slo
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Figure G.2. Turf Reinforcement Mat
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c. For subsurface discharge level s
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asin/trap, it should be off-line du
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Design to Avoid Downstream Erosion
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Down Slope Ground Cover Table G.2.
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VIII. OUTFALL DESIGN As previously
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Figure G.10. Rill/Gully Repair Figu
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X. SELECTED REFERENCES Pennsylvania
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APPENDIX H - DUST CONTROL Descripti
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Table H.2. Adhesives Used for Dust
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Tree Health Preserving trees is not
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can have blocky aggregates. They ha
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Site Characteristics—Site charact
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Identify trees in need of care In t
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363-2134-008 / March 31, 2012 / Pag
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Use accurate information. The plan
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The transplanting process requires
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Protecting Trees During Constructio
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geotextile. The plastic core is mad
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Retain a qualified arborist to perf
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Repairing Construction Injury The m
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Tree Techniques Tree injury Tree li
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Improve the aeration and drainage o
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1995. Tree-Pruning Guidelines. (Gui
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APPENDIX J - Publication: “Unders
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ions such as calcium, magnesium, an
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Soil Structure Is Destroyed by Comp
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compaction in decent, fertile soils
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A Note on Organic Materials and Ame
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Final Strategies for Dealing with C
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This publication is available from
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363-2134-008 / March 31, 2012 / Pag
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Aeration -----Mixing water with air
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Aquiclude -----A geologic formation
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Bedrock----- The more or less solid
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C-Horizon -----A layer of unconsoli
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Clay -----A fine-grained cohesive s
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Where: Q = Flow volume (cfs) V = Fl
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Cut and Cover -----A method of tren
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Diabase -----A rock of basaltic com
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E&S Plan -----Erosion and Sediment
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E&S Plan -----A site-specific plan
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Filter Fabric Fence -----A sediment
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Frost Action (Soils) -----The likel
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Grade -----1. The slope of a road o
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Holding Structure -----Any excavati
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Inlet Protection -----Type of BMP u
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Level Spreader -----An earthen or m
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Mesic -----Refers to environmental
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NOI -----Notice of Intent Nominal S
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Organic Soil -----Soil composed pre
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Percolation Test -----A measure of
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Pollutant -----Any contaminant or o
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Range -----The geographic region in
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stabilization; cutting of existing
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Section 404 ----The section of the
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Slope Protection -----A layer or fa
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Stable Channel Flow -----Channel fl
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stabilization techniques that consi
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Terrace -----An earthen embankment
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Trench Plug -----A flow obstruction
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Vernal Pool -----Wetlands that occu
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Y Yellowboy -----Iron oxide deposit
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26. Filtrexx, Standard Specificatio
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86. USEPA, National Pollutant Disch
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