Erosion and Sediment Pollution Control Program Manual.pdf

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PA DEP STANDARD CONSTRUCTION DETAIL # 6-6 Bench Detail Benches shall be inspected on a weekly basis and after each runoff event. Benches shall be maintained to design dimensions at all times. Needed repairs shall be initiated immediately after the inspection. 363-2134-008 / March 31, 2012 / Page 158
CHAPTER 7 - SEDIMENT BASINS DESIGN CRITERIA SUMMARY 1. Sediment basins may not be located within the drainage area of a sediment trap or another sediment basin (unless the sediment basins are integral to the permanent stormwater design and are properly sized for storage and discharge capacities). Sediment basins also may not be located within a live stream channel, or a wetland. The bottom elevation should not be located below the seasonal high water table, adjacent wetlands, or perennial stream channels. Unanticipated springs and seeps intercepted during excavation should be safely conveyed around the basin to a suitable down gradient discharge point. 2. In karst topography, impounded water causes soil saturation and loss of cohesion, and produces stress from the weight of the water. Differences in hydraulic head and steep hydraulic gradients can result in sinkhole development. To ensure that these facilities are kept small and shallow, it is recommended that drainage areas be kept to 5 acres or less and that sediment traps be utilized to the maximum extent practicable so that the total depth is kept below 5 feet (see Chapter 8 – Sediment Traps for more information). For areas where a sediment basin cannot be avoided, the designer should keep the depth to the minimum (4 feet to the top of the settling volume). At the discretion of the designer, it may be necessary to install an impermeable liner based on geotechnical testing, known occurrences of sinkhole development, and whether the basin will be converted to a permanent stormwater management facility. Maintenance instructions should emphasize the importance of ensuring the integrity of all pipes. Pipe leakage or sagging can become the focus of soil loss into subsurface voids leading to subsidence and the development of sinkholes. Should sinkholes develop, they should be promptly and properly repaired. Please see Chapter 17, Areas of Special Concern, for information regarding sinkhole repair. Information regarding sinkhole repair should be placed on the plan drawings. 3. Access to proposed and existing basins should be provided in accordance with the standards provided in Chapter 3. Such accesses should be maintained for the life of the basin. When no longer needed, accesses should be regraded and stabilized in accordance with Chapter 11. 4. Permanent basins which are used temporarily as sediment basins must be designed to meet the requirements of the permanent basin (e.g. inside and outside slopes, permanent outlet structures, benches, forebays, access ramps, and preservation/remediation of subsoils for infiltration rates). Sediment basins that will be converted to infiltration basins should be constructed in accordance with the Pennsylvania Stormwater Best Management Practices Manual or other appropriate design standard at the discretion of the Department. Note that the risk of infiltration failure may increase significantly for infiltration basins used as sediment basins during construction. 5. A sediment storage zone of 1,000 cubic feet per disturbed acre — over the life of the project within the watershed of the basin is required. The sediment storage zone should be at least 1 foot in depth. This zone is in addition to any permanent pool requirement. 6. A dewatering zone of 5,000 cubic feet for each disturbed and undisturbed acre disturbed and undisturbed tributary to the basin is also to be provided. Reductions in the dewatering zone are allowed unless the basin is in an HQ or EV watershed. However, the minimum required dewatering zone in non-special protection watersheds is 3,600 cubic feet per acre. The minimum depth of the dewatering zone is 3 feet. 363-2134-008 / March 31, 2012 / Page 159
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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
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WOOD CHIP FILTER BERM - Sediment Re
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STRAW BALE BARRIER - Sediment Remov
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NRCS FIGURE 4.4 Straw Bale Barrier
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A one foot thick layer of AASHTO #5
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The total width of the filter strip
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INLET FILTER BAG - Sediment Removal
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Adapted from Maine DEP Maximum drai
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Page 127 and 128: 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 and 158: TABLE 6.9 Recommended n Values to b
Page 159 and 160: TABLE 6.10 Maximum Permissible Velo
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 175 and 176: STANDARD CONSTRUCTION DETAIL # 6-5
Page 177: BENCH - Benches (a.k.a. gradient te
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 187 and 188: STANDARD CONSTRUCTION DETAIL # 7-1
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
Page 209 and 210: Embedded section of aluminum or alu
Page 211 and 212: Wherever total basin dewatering is
Page 215 and 216: Riprap at toe of embankment shall b
Page 217 and 218: Head TABLE 7.6 - GRASS-LINED EMERGE
Page 219 and 220: 4. Once the depth of flow through t
Page 223 and 224: Anti-seep Collar Wherever soils sus
Page 225 and 226: 4. The maximum spacing between coll
Page 227 and 228: 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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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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