Erosion and Sediment Pollution Control Program Manual.pdf

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18. A key trench, or cutoff trench, is recommended for all basin embankments with heights exceeding 8 feet and is required for all permanent basins. Minimum trench depth = 2’, minimum width = 4’, maximum side slope steepness is 1H:1V. The trench should extend up both abutments to the riser crest elevation. Compaction requirements should be the same as those for the embankment. The trench should be dewatered during backfilling and compaction operations. NOTE: A key trench may not be required wherever it can be shown that another design feature, such as the use of an impermeable liner, accomplishes the same purpose. 19. Any springs encountered in the foundation area of a basin embankment should be drained to the outside/downstream toe of the embankment with a drain section two feet by two feet in dimension consisting of PennDOT Type A sand, compacted by hand tamper. No geotextiles are to be used around the sand. The last three feet of this drain at the outside/downstream slope should be constructed with AASHTO #8 material. Other methods of draining spring discharges may be accepted on a case-by-case basis. 20. All basin embankments should be compacted by sheepsfoot or pad roller. The loose lift thickness should be 9 inches or less, depending on roller size, and the maximum particle size is 6 inches or less — 2/3 lift thickness. Five passes of the compaction equipment over the entire surface of each lift is required. Embankment compaction to visible non-movement is also required. 21. The minimum embankment top width is 8 feet. The maximum constructed embankment slope is 2H:1V. The sum of the horizontal components of the inside and outside embankment slopes (Z1 + Z2) should total at least 5. The maximum steepness of slopes for constructed embankments in permanent basins is 3H:1V inside and outside. Embankments and other disturbed areas in and around the basin should be stabilized immediately upon completion of the basin. Trees may not be planted on any basin embankment, because the root systems may compromise the integrity of the berm over time. Trees may be planted in the non-embankment (pool) areas of permanent basins. 22. A minimum of 24 inches of freeboard is required above the elevation at which the 2 cfs/acre discharge capacity or the routed peak flow from the 25-year, 24-hour storm is provided. If the emergency spillway is being used to provide part of the design discharge, the freeboard should be provided above the design flow elevation in the emergency spillway. An acceptable alternative is to provide a discharge capacity equal to the 100-year, 24-hour storm event, assuming maximum runoff conditions, with 12 inches of freeboard. 23. All exposed embankment slopes should be limed, fertilized, seeded and mulched. Permanent vegetative ground cover in compliance with 25 Pa. Code § 102.22 (relating to site stabilization) should be established upon completion of basin construction. Outside slopes should be blanketed. 24. Embankments should be maintained with a grassy vegetative cover, free of brush and trees. 25. When a perforated riser is selected as the means to dewater a temporary sediment basin as shown in Standard Construction Details # 7-6 and # 7-7, the diameter of the riser should be at least 1.25 times that of the outlet barrel. The minimum riser diameter is 15”. The minimum barrel diameter is 12”. 26. In those instances when a sediment basin will be later used as a stormwater management pond, a temporary riser may be attached to the permanent riser to dewater the dewatering zone within the required time period while the basin is acting as a sediment basin. The diameter of a temporary riser attached to a permanent riser need not be 1.25 times that of the permanent outlet barrel. An acceptable means of using a temporary riser in conjunction with a permanent riser is shown in Standard Construction Detail # 7-9. Temporary dewatering holes may also be drilled into the permanent riser — with permanent orifices temporarily sealed — instead of attaching a temporary riser to the permanent riser. For this option, the same number of holes, rows and vertical spacing with the same size of holes and elevations of the rows should be used as would have been used on the temporary riser. It should be noted that storm sewer inlets tributary to such a basin should be maintained at elevations above the crest of the embankment while the basin is functioning as a sediment basin to prevent flooding of streets. 363-2134-008 / March 31, 2012 / Page 162
Adapted from VA SWCC PA DEP FIGURE 7.1 Sediment Basin TYPICAL SECTION NOTE: This figure is for illustration purposes only and should not be used as a construction detail. 363-2134-008 / March 31, 2012 / Page 163
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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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Page 49 and 50:
Page 51 and 52:
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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Page 101 and 102:
Page 103 and 104:
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
Page 119 and 120:
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Adapted from Maine DEP Maximum drai
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Page 125 and 126:
Page 127 and 128:
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 and 178: BENCH - Benches (a.k.a. gradient te
Page 179 and 180: CHAPTER 7 - SEDIMENT BASINS DESIGN
Page 181: 14. The discharge from a sediment b
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 191 and 192: PA DEP STANDARD CONSTRUCTION DETAIL
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
Page 229 and 230: FILTER DIAPHRAGM Filter diaphragms
Page 231 and 232: Sediment Storage Zone Dewatering Pr
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4. Greater surface area increases t
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Page 237 and 238:
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
Page 277 and 278:
The E&S plan should include such in
Page 279 and 280:
Wherever the slope parallels the ro
Page 281 and 282:
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
Page 291 and 292:
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
Page 307 and 308:
STANDARD CONSTRUCTION DETAIL #13-1
Page 309 and 310:
Page 311 and 312:
Page 313 and 314:
PA DEP FIGURE 13.1 Waterbar Install
Page 315 and 316:
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
Page 321 and 322:
PA Timber Harvesting Packet FIGURE
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CHAPTER 15 - STREAMBANK STABILIZATI
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Figure 15.1 Riprap Streambank Prote
Page 327 and 328:
GABIONS and Reno mattress have been
Page 329 and 330:
PA DEP FIGURE 15.4 Reno Mattress St
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Adapted from VA DSWC FIGURE 15.5 Gr
Page 333 and 334:
MISCELLANEOUS HARD ARMOR TECHNIQUES
Page 335 and 336:
Natural colonization by surrounding
Page 337 and 338:
INSTALLATION GUIDELINES Prepare the
Page 339 and 340:
Branchpacking is the alternating of
Page 341 and 342:
Fabric encapsulated soil is often u
Page 343 and 344:
Fiber rolls, or coir logs, are cyli
Page 345 and 346:
CHAPTER 16 - GRADING STANDARDS PA D
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CHAPTER 17 - AREAS OF SPECIAL CONCE
Page 349 and 350:
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
Page 355 and 356:
No RECOMMENDED PROCESS FOR SITES WI
Page 357 and 358:
Common Contaminants of Concern: Two
Page 359 and 360:
Structural (Stabilization) Erosion
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ii. The siting and function of any
Page 363 and 364:
SPECIAL PROTECTION WATERSHEDS Sourc
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impacts, including suitability of g
Page 367 and 368:
SLOPE FAILURES PA DEP The Problem I
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TABLE 17.1 PROCESSES LEADING TO LAN
Page 371 and 372:
GEOTHERMAL WELL DRILLING Source Unk
Page 373 and 374:
Well (or Total Well Field) Flows Gr
Page 375 and 376:
Project: COMPLETE PLAN CHECKLIST A.
Page 377 and 378:
STANDARD E&S CONTROL PLAN TECHNICAL
Page 379 and 380:
“A maintenance program, which pro
Page 381 and 382:
Complies Deficient N/A Hydric soils
Page 383 and 384:
Complies Deficient N/A Removal of t
Page 385 and 386:
Complies Deficient N/A Standard E&S
Page 387 and 388:
Sediment Traps (Chapter 8) Complies
Page 389 and 390:
Permanent Stabilization Topsoil rep
Page 391 and 392:
APPENDIX B - STANDARD E&S WORKSHEET
Page 393 and 394:
STANDARD E&S WORKSHEET #2 Compost F
Page 395 and 396:
STANDARD E&S WORKSHEET # 4 Reinforc
Page 397 and 398:
STANDARD E&S WORKSHEET # 6 Super Si
Page 399 and 400:
STANDARD E&S WORKSHEET # 8 Rock Fil
Page 401 and 402:
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
Page 417 and 418:
APPENDIX D - STANDARDS FOR MAPS AND
Page 419 and 420:
PLAN DRAWINGS Each bit of informati
Page 421 and 422:
e carefully preserved and stored fo
Page 423 and 424:
SOIL NAME CUTBANKS CAVE CORROSIVE T
Page 425 and 426:
Page 427 and 428:
Page 429 and 430:
Page 431 and 432:
ROUGHNESS ELEMENT DISSIPATER - This
Page 433 and 434:
2. Determine Discharge Velocity (VO
Page 435 and 436:
From Figure F.8, VA/VO = 1.05 VA =
Page 437 and 438:
Yo / D FIGURE F.4 Dimensionless Rat
Page 439 and 440:
USDOT, FHWA HEC 14 FIGURE F.6 Flow
Page 441 and 442:
FIGURE F.8 Average Velocity in Abru
Page 443 and 444:
FIGURE F.10 Average Depth for Abrup
Page 445 and 446:
FIGURE F.12 Riprap Size for Use Dow
Page 447 and 448:
EXAMPLE - Given: Circular Concrete
Page 449 and 450:
USDOT, FHWA HEC 14 FIGURE F.14 Impa
Page 451 and 452:
designed to discharge all anticipat
Page 453 and 454:
Figure G.1. Convex Contours and Slo
Page 455 and 456:
Figure G.2. Turf Reinforcement Mat
Page 457 and 458:
c. For subsurface discharge level s
Page 459 and 460:
asin/trap, it should be off-line du
Page 461 and 462:
Design to Avoid Downstream Erosion
Page 463 and 464:
Down Slope Ground Cover Table G.2.
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VIII. OUTFALL DESIGN As previously
Page 467 and 468:
Figure G.10. Rill/Gully Repair Figu
Page 469 and 470:
X. SELECTED REFERENCES Pennsylvania
Page 471 and 472:
APPENDIX H - DUST CONTROL Descripti
Page 473 and 474:
Table H.2. Adhesives Used for Dust
Page 475 and 476:
Tree Health Preserving trees is not
Page 477 and 478:
can have blocky aggregates. They ha
Page 479 and 480:
Site Characteristics—Site charact
Page 481 and 482:
Identify trees in need of care In t
Page 483 and 484:
363-2134-008 / March 31, 2012 / Pag
Page 485 and 486:
Use accurate information. The plan
Page 487 and 488:
The transplanting process requires
Page 489 and 490:
Protecting Trees During Constructio
Page 491 and 492:
geotextile. The plastic core is mad
Page 493 and 494:
Retain a qualified arborist to perf
Page 495 and 496:
Repairing Construction Injury The m
Page 497 and 498:
Tree Techniques Tree injury Tree li
Page 499 and 500:
Improve the aeration and drainage o
Page 501 and 502:
1995. Tree-Pruning Guidelines. (Gui
Page 503 and 504:
APPENDIX J - Publication: “Unders
Page 505 and 506:
ions such as calcium, magnesium, an
Page 507 and 508:
Soil Structure Is Destroyed by Comp
Page 509 and 510:
compaction in decent, fertile soils
Page 511 and 512:
A Note on Organic Materials and Ame
Page 513 and 514:
Final Strategies for Dealing with C
Page 515 and 516:
This publication is available from
Page 517 and 518:
363-2134-008 / March 31, 2012 / Pag
Page 519 and 520:
Aeration -----Mixing water with air
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Aquiclude -----A geologic formation
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Bedrock----- The more or less solid
Page 525 and 526:
C-Horizon -----A layer of unconsoli
Page 527 and 528:
Clay -----A fine-grained cohesive s
Page 529 and 530:
Where: Q = Flow volume (cfs) V = Fl
Page 531 and 532:
Cut and Cover -----A method of tren
Page 533 and 534:
Diabase -----A rock of basaltic com
Page 535 and 536:
E&S Plan -----Erosion and Sediment
Page 537 and 538:
E&S Plan -----A site-specific plan
Page 539 and 540:
Filter Fabric Fence -----A sediment
Page 541 and 542:
Frost Action (Soils) -----The likel
Page 543 and 544:
Grade -----1. The slope of a road o
Page 545 and 546:
Holding Structure -----Any excavati
Page 547 and 548:
Inlet Protection -----Type of BMP u
Page 549 and 550:
Level Spreader -----An earthen or m
Page 551 and 552:
Mesic -----Refers to environmental
Page 553 and 554:
NOI -----Notice of Intent Nominal S
Page 555 and 556:
Organic Soil -----Soil composed pre
Page 557 and 558:
Percolation Test -----A measure of
Page 559 and 560:
Pollutant -----Any contaminant or o
Page 561 and 562:
Range -----The geographic region in
Page 563 and 564:
stabilization; cutting of existing
Page 565 and 566:
Section 404 ----The section of the
Page 567 and 568:
Slope Protection -----A layer or fa
Page 569 and 570:
Stable Channel Flow -----Channel fl
Page 571 and 572:
stabilization techniques that consi
Page 573 and 574:
Terrace -----An earthen embankment
Page 575 and 576:
Trench Plug -----A flow obstruction
Page 577 and 578:
Vernal Pool -----Wetlands that occu
Page 579 and 580:
Y Yellowboy -----Iron oxide deposit
Page 581 and 582:
26. Filtrexx, Standard Specificatio
Page 583:
86. USEPA, National Pollutant Disch
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