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Home My WebLink About421 Quarry Mine Engineering Report with CalculationsEROSION AND SEDIMENT CONTROL REPORT WINSTON-SALEM 421 QUARRY FORSYTH, NORTH CAROLINA Prepared For: VULCAN MATERIALS COMPANY Prepared By: CIVIL & ENVIRONMENTAL CONSULTANTS, INC. CHARLOTTE, NORTH CAROLINA CEC Project 314-511 OCTOBER 2021 NORTH CAROLINA BOARD OF EXAMINERS FOR ENGINEERS AND SURVEYORS LICENSE NO. C-3035 Civil & Environmental Z7AVIAL7AV F Consultants, Inc. Charlotte 1 3701 Arco Corporate Drive, Suite 400 1 Charlotte, NC 28273 1 p: 980-237-0373 f: 980-237-0372 1 www.cecinc.com TABLE OF CONTENTS 1.0 CONSTRUCTION NARRATIVE....................................................................................I 1.1 PROJECT DESCRIPTION..................................................................................... 1 1.2 SITE DESCRIPTION............................................................................................. 1 1.2.1 EXISTING SITE..........................................................................................1 1.2.2 PROPOSED SITE........................................................................................1 1.3 ADJACENT BOUNDARIES................................................................................. 1 1.4 SOILS..................................................................................................................... 1 2.0 SITE DRAINAGE..............................................................................................................2 3.0 EROSION AND SEDIMENTATION CONTROL PLAN.............................................2 3.1 PLANNED EROSION CONTROL PRACTICES ................................................. 2 3.1.1 TEMPORARY/PERMANENT BASINS....................................................2 3.1.2 SEDIMENT FENCE....................................................................................2 3.1.3 TEMPORARY DIVERSION......................................................................3 3.1.4 RIPRAP OUTLET PROTECTION.............................................................3 3.1.5 LAND GRADING.......................................................................................3 3.2 EROSION CONTROL SEQUENCE..................................................................... 3 3.3 MAINTENANCE PLAN........................................................................................ 3 APPENDICES APPENDIX A — TOPOGRAPHIC MAP, SOIL MAP, RAINFALL DATA APPENDIX B — EROSION & SEDIMENT CONTROL CALCULATIONS Civil & Environmental Consultants, Inc. Winston-Salem 421 Quarry October 2021 1.0 CONSTRUCTION NARRATIVE 1.1 PROJECT DESCRIPTION This project includes the dewatering and filling of an existing closed aggregate quarry located at 4900 Kester Mill Rd Winston-Salem, North Carolina 27103. This erosion control plan includes the dewatering, clearing/grubbing, installation of erosion/sediment measures and filling operations in the existing approximate 8 acre closed aggregate mine pit. 1.2 SITE DESCRIPTION 1.2.1 EXISTING SITE The existing site is located just off NC Highway 421 in Forsyth County, North Carolina. This site is an existing closed aggregate quarry which currently has been reclamated to a manmade lake with trees and open grassed areas. Slopes range from 2-15% on majority of the site. Steep slopes up to 50% are found near the buffer limit to the tributary on the north and west side of the site. A topographic map (Figure 1) in appendix A shows the general area of the project site and surrounding features. 1.2.2 PROPOSED SITE The proposed site will have a main entrance at latitude N36°4' 14.19" and longitude W80°20'59.09" along Kester Mill Road. The site will be used to de -water & fill in the existing quarry with fill material from other Vulcan Quarry's nearby. The fill material, consisting of naturally occurring materials, will only be imported from approved erosion control permitted quarries. 1.3 ADJACENT BOUNDARIES The project site is bounded on the north by US Highway 421 & Silas Creek, to the west by Silas Creek, to the south by residential properties and commercial properties to the east. 1.4 SOILS See Appendix A for soil chart. Civil & Environmental Consultants, Inc. -1- Winston-Salem 421 Quarry October 2021 2.0 SITE DRAINAGE The Project natually drains to the north and west to Silas Creek. Based on NCDEQ surface water classification program, Silas Creek has a suface water classification C, Stream Index # 12-9410 and drains to the Yadkin Pee -Dee Basin. 3.0 EROSION AND SEDIMENTATION CONTROL PLAN 3.1 PLANNED EROSION CONTROL PRACTICES An Erosion and Sedimentation Control Plan was developed to meet the requirements set forth by the North Carolina Department of Environmental Quality (NCDEQ). All erosion and sedimentation control measures were designed based on a 25-year, 24-hour storm event in Winston-Salem, North Carolina. Temporary measures to be used on site include a temporary polishing settling basin, temporary sediment sump, seeding, diversion channels, temporary slope drains, silt (sediment) fencing, and inlet/outlet protection. Maintenance of these measures shall follow the requirements outlined in the NCDEQ Erosion Control Manual. Calculations and corresponding references are located in Appendix B, Erosion and Sediment Control Calculations. Relevant drawings are included with this narrative. 3.1.1 TEMPORARY BASINS One (1) temporary polishing/settling basin & one (1) sediment sump are proposed for this site, at designated natural drainage points that are located along the low points of the property. Refer to erosion control drawings C300-C305 for locations. Runoff from disturbed areas will be directed to these temporary basins using appropriate conveyance measures as shown on the plans. 3.1.2 SEDIMENT FENCE Sediment fence will be constructed as shown on the plans and as needed on the project. Contractor will install additional sediment fence as needed. Civil & Environmental Consultants, Inc. -2- Winston-Salem 421 Quarry October 2021 3.1.3 TEMPORARY DIVERSION Temporary diversions will be constructed to convey runoff and sediment to the temporary sediment sump. Temporary diversion ditches will be adjusted as pit fill operations progress. 3.1.4 RIPRAP OUTLET PROTECTION Riprap protections will be placed at temporary/permanent diversion ditches and slope drain outlets to prevent scouring and fast moving runoff. 3.1.5 LAND GRADING Perimeter sediment controls will be implemented prior to beginning any grading activities. Perimeter sediment controls are as follows but not limited to: temporary polishing/settling basin, temporary & permanent diversion ditches, temporary slope drain, and inlet/outlet protection. The excess top soil and cut material will be mixed within fill materials, temporary basins, perimeter sediment controls unless it can be shown no other alternatives are reasonably available and will be utilized to fill in temporary basins once its contributing drainage area is stabilized. Basin fill slopes will typically be graded at 2(horizontal): I (vertical). Fill will be placed in layers not to exceed 8 inches and compacted. Four to six inches (4"-6") of fill surface will be left in loose condition and groomed on the contour before seeding. Filling will be done as a continuous operation until final grade is reached. Temporary diversions and accompanying berms will be maintained daily throughout construction. 3.2 EROSION CONTROL SEQUENCE See plan sheets C300-C305 for written construction sequence for each phase. 3.3 MAINTENANCE PLAN 1. All erosion and sediment control practices will be checked for stability and operation following every runoff -producing rainfall but in no case less than once every week. Any needed repairs will be made immediately to maintain all practices as designed. 2. The temporary sediment basins will be cleaned out when the level of sediment reaches one- half the height of the first baffle or rock dam. Civil & Environmental Consultants, Inc. -3- Winston-Salem421 Quarry October 2021 3 M Sediment will be removed behind the silt fence when it becomes about 6 inches deep at the fence. The silt fence will be repaired as necessary to maintain a barrier. All seeded areas will be fertilized, reseeded as necessary, and mulched according to specifications in the vegetative plan to maintain a vigorous, dense, vegetative c Civil & Environmental Consultants, Inc. -4- Winston-Salem421 Quarry October 2021 APPENDIX A U.S.G.S. MAP 0 g o � o o HE RTHSIDE DR o TRY- I CAVALIER EOVF_y/RyA ,NORTH' AL'AMO DR rSq TI FANYAVE pgRKR/DGE'LN n LUKON-LN lgJ E Rp GJ1lX_ O 0 9?i HEATHCL%Fk �y \ j a QJ y14 7�py gym, v HORN HEATH U ERTOV IIy Y RYANDAL'RD <<UB,RD W a SYLVI � �R C�O C DALL:3T SW asp l,/ 1 YARD RD NGS CTi - s g�, FAN �ell'O "$ c�yMERCI REGENTS V/ 850 J LLAGF Y DR O I� KESTER ILL RD O O HANES.MALL.BLVD ESTCHESTER RD CREEKSHIRE WAY ER RD 750 O TOA'/NGTON RD SW � � �,y� Q INCA LN n A L FLINTFIELD OR BRIDGEPORT--DR Io RO o 0 ATWOOD,RD o mo O� _ A SARA N n BURLWOOD DR 11 V� � C LTEiVHAM Q �O} FARMBROOK RD Q� A moo TILMARK'DR� v o O} s61,, � p Jonestown ��0 4pYC{'4TF �, o� o44Ns�o �T ��P °p A C 4 USGS MAP SCALE IN FEET U.S.G.S. 7.5 MIN. TOPOGRAPHIC MAP, KINGS CREEK, NC QUADRANGLE, DATED: 2019 0 2000 4000 t VULCAN MATERIALS COMPANY s WINSTON SALEM 421 QUARRY WINSTON-SALEM, NORTH CAROLINA 3701 Arco Corporate Drive • Suite 400 • Charlotte, NC 28273 Ph: 980.237.0373 • Fax: 980.237.0372 U.S.G.S. TOPO MAP www.cecinc.com DRAWN BY: MR,1 I CHECKED BY: ERR APPROVED BY: SWW FIGURE NO.: DATE: OCTOBER 20211 DWG SCALE: 1 20001 PROJECT NO: 314-51 1 1 SOILS MAP 3 0 $N W 558280 36° 4' 23" N i Hydrologic Soil Group —Forsyth County, North Carolina (Property Lines) 558340 558400 558460 558520 55M 558640 360 4' 11" N 558280 558340 558400 558460 558520 558580 3 0 Map Scale: 1:2,570 if printed on A landscape (11" x 8.5") sheet Meters N 0 35 70 140 210 Feet 0 100 200 400 600 Map projection: Web Mercator Comer coordinates: WGS84 Edge tics: UTM Zone 17N WG.S84 USDA Natural Resources Web Soil Survey Conservation Service National Cooperative Soil Survey 558700 558760 558640 558700 1 36° 4' 11" N 558760 558820 3 i v N m 10/15/2021 Page 1 of 4 Hydrologic Soil Group —Forsyth County, North Carolina (Property Lines) MAP LEGEND Area of Interest (AOI) 0 Area of Interest (AOI) Soils Soil Rating Polygons A A/D 71 B Q B/D C C/D 0 D Not rated or not available Soil Rating Lines r r A r r A/D rV B B/D r .r C rwr CID D r r Not rated or not available Soil Rating Points ■ A ■ A/D ■ B ■ B/D MAP INFORMATION p C The soil surveys that comprise your AOI were mapped at 1:15,800. 0 CID ■ D Warning: Soil Map may not be valid at this scale. 0 Not rated or not available Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil Water Features line placement. The maps do not show the small areas of Streams and Canals contrasting soils that could have been shown at a more detailed scale. Transportation Fi-F Rails Please rely on the bar scale on each map sheet for map r Interstate Highways measurements. rrr US Routes Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Major Roads Coordinate System: Web Mercator (EPSG:3857) Local Roads Maps from the Web Soil Survey are based on the Web Mercator Background projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Aerial Photography Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Forsyth County, North Carolina Survey Area Data: Version 22, Sep 1, 2021 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Oct 17, 2020—Nov 3, 2020 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. USDA Natural Resources Web Soil Survey 10/15/2021 Conservation Service National Cooperative Soil Survey Page 2 of 4 Hydrologic Soil Group —Forsyth County, North Carolina Property Lines Hydrologic Soil Group Map unit symbol Map unit name Rating Acres in AOI Percent of AOI CoA Codorus loam, 0 to 2 B/D 0.1 0.6% percent slopes, frequently flooded 0.6 FaC Fairview fine sandy B 2.8% loam, 6 to 10 percent slopes FaD Fairview fine sandy B 0.3 1.5% loam, 10 to 15 percent slopes FaF Fairview fine sandy B 3.1 15.7% loam, 15 to 45 percent slopes FcC2 Fairview clay loam, 6 to C 0.1 0.7% 10 percent slopes, moderately eroded FcD2 Fairview clay loam, 10 C 0.2 0.9% to 15 percent slopes, moderately eroded Pt Pits, quarry 9.9 49.9% W Water 5.5 27.8% Totals for Area of Interest 19.9 100.0% usDA Natural Resources Web Soil Survey 10/15/2021 Conservation Service National Cooperative Soil Survey Page 3 of 4 Hydrologic Soil Group —Forsyth County, North Carolina Property Lines Description Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long -duration storms. The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink -swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. Rating Options Aggregation Method: Dominant Condition Component Percent Cutoff. None Specified Tie -break Rule: Higher USDA Natural Resources Web Soil Survey 10/15/2021 Conservation Service National Cooperative Soil Survey Page 4 of 4 RAINFALL DATA NOAA Atlas 14, Volume 2, Version 3 Location name: Winston Salem, North Carolina,• USA* Latitude: 36.0713°, Longitude:-80.3497° Elevation: 763.51 ft** source: ESRI Maps ** source: USGS POINT PRECIPITATION FREQUENCY ESTIMATES G.M. Bonnin, D. Martin, B. Lin, T. Parzybok, M.Yekta, and D. Riley NOAA, National Weather Service, Silver Spring, Maryland PF tabular I PF graphical I Maps & aerials PF tabular PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches/hour)1 Average recurrence interval (years) Duration �� 0 1 2 5 10 P 50 100 200 500 1000 5-min 4.48 5.32 6.24 6.86 8.098.528.909.32 9.61 (4.13-4.86) (4.91-5.78) (5.75-6.78) (6.31-7.45)(7.36-8.77) (7.70-9.26) (7.99-9.71) (8.28-10.2) (8.45-10.5) 3.58 4.25 4.99 5.50 6.44 6.77 7.06 7.37(3.30-3.88) (3.93-4.63) (4.60-5.43) (5.05-5.96) (5.(5.86-6.98) (6.12-7.36) (6.34-7.69) (6.55-8.07) (6.65-8.31) 15-min 2.98 3.56 4.21 4.63 5.12 5.43 5.70 5.94 6.19 6.33 (2.75-3.23) (3.29-3.88) (3.88-4.58) (4.26-5.03) (4.68-5.55) 1 (4.94-5.90) (5.16-6.20) (5.33-6.47) (5.50-6.77) (5.57-6.95) 30-min 2.04 2.46 2.99 3.36 (1.88-2.22) 1 (2.27-2.68) 1 (2.76-3.25) 1 (3.09-3.64) 60-min 1.27 1.54 1.92 2.19 (1.18-1.38) 1 (1.43-1.68) 1 (1.77-2.09) 1 (2.01-2.37) 3.79 4.09 4.37 4.62 4.93 5.13 (3.47-4.11) 1 (3.72-4.44) 1 (3.95-4.75) 1 (4.15-5.04) 1 (4.37-5.39) 1 (4.51-5.63) 2.52 2.77 3.01 3.24 3.53 3.74 (2.31-2.74) 1 (2.72-3.27) 1 (2.91-3.53) 1 (3.14-3.86) 1 (3.29-4.11) 2-hr 0.742 0.901 1.13 1.30 1.52 1.69 1.86 2.02 2.24 2.40 (0.686-0.807) (0.831-0.982) (1.04-1.23) 1 (1.19-1.41) 1 (1.39-1.65) 1 (1.53-1.83) 1 (1.67-2.02) 1 (1.80-2.20) 1 (1.97-2.44) 1 (2.09-2.63) 3-hr 0.529 0.642 0.807 0.930 1.09 F 1.34 1.47 1.64 1.76 (0.489-0.576) (0.594-0.701) (0.745-0.878) (0.854-1.01) (0.997-1.19) 1 (1.21-1.46) 1 (1.31-1.60) 1 (1.44-1.79) 1 (1.53-1.93) 6-hr 0.324 0.392 0.492 0.569 0.673 0.755 0.839 0.923 1.04 1.13 (0.299-0.354) (0.362-0.428) (0.453-0.537) (0.522-0.619) (0.613-0.731) (0.683-0.820) (0.751-0.909) (0.818-1.00) (0.905-1.13) (0.971-1.23) 12-hr 0.192 0.232 0.292 0.340 0.405 0.457 0.512 0.568 0.647 0.709 (0.177-0.210) (0.214-0.254) (0.269-0.319) (0.311-0.370) (0.368-0.440) (0.412-0.495) (0.457-0.554) (0.501-0.614) (0.560-0.700) (0.604-0.767) 24-hr 0.117 0.141 0.177 0.205 (0.108-0.126) (0.131-0.152) (0.164-0.191) (0.189-0.222) 2-day 0.068 0.082 0.102 0.117 (0.063-0.073) (0.076-0.088) (0.094-0.109) (0.109-0.126) 0.244 0.275 0.308 0.341 0.387 0.424 (0.225-0.264) (0.252-0.298) (0.281-0.333) (0.310-0.369) (0.350-0.420) (0.381-0.461) 0.138 0.155 07-0. 09-0. (0.128-0.148) (0.142-0.166) (0.157-0.185) 73-0. (0.173-0.204) 93-02 (0.193-0.229) (0.209-0.250) 3-day 0.048 0.058 0.072 0.082 0.097 0.109 0.120 F 0.133 F 0.149 0.162 (0.045-0.052) (0.054-0.062) (0.067-0.077) (0.077-0.088) (0.090-0.104) (0.100-0.117) (0.111-0.130) (0.121-0.143) (0.136-0.161) (0.147-0.176) 4-day 0.038 0.046 0.057 0.065 0.076 0.086 0.095 0.105 0.118 0.128 (0.036-0.041) (0.043-0.049) (0.053-0.061) (0.061-0.070) (0.071-0.082) (0.079-0.092) (0.087-0.102) (0.096-0.113) (0.107-0.127) (0.116-0.139) 7-day 0.025 0.030 0.036 0.041 0.048 0.054 0.059 0.065 0.073 0.079 (0.023-0.027) (0.028-0.032) (0.034-0.039) (0.039-0.044) (0.045-0.051) (0.050-0.057) (0.055-0.063) (0.060-0.070) (0.067-0.078) (0.072-0.085) 10-day 0.020 0.024 0.028 0.032 0.037 0.041 0.045 0.049 0.055 0.059 (0.019-0.021) (0.022-0.025) (0.027-0.030) (0.030-0.034) (0.035-0.040) (0.038-0.044) (0.042-0.048) (0.046-0.053) (0.051-0.059) (0.054-0.064) 20-day 0.013 0.016 0.019 0.021 0.024 0.027 0.029 0.031 0.035 0.037 (0.013-0.014) (0.015-0.017) (0.018-0.020) (0.020-0.022) (0.023-0.025) (0.025-0.028) (0.027-0.031) (0.029-0.033) (0.032-0.037) (0.034-0.040) 30-day 0.011 0.013 T 0.015 T 0.017 T 0.019 T 0.020 T 6.022 T 6.024 T 6.026 T 6.027 (0.010-0.012) (0.012-0.014) (0.014-0.016) (0.016-0.017) (0.018-0.020) (0.019-0.021) (0.021-0.023) (0.022-0.025) (0.024-0.027) (0.025-0.029) 45-day 0.009 0.011 0.012 0.014 0.015 0.016 0.017 0.019 0.020 0.021 (0.009-0.010) (0.010-0.011) (0.012-0.013) (0.013-0.014) (0.014-0.016) (0.016-0.017) (0.017-0.018) (0.018-0.020) (0.019-0.021) (0.020-0.022) 60-day 0.008 11 0.010 0.011 0.012 0.013 0.014 0.015 0.016 0.017 0.018 (0.008-0.009) (0.009-0.010) (0.010-0.011) (0.011-0.012) (0.013-0.014) (0.013-0.015) (0.014-0.016) (0.015-0.016) (0.016-0.018) (0.017-0.01 1 Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS). umbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates (for a ven duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%. Estimates at upper bounds are not iecked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PIMP values. refer to NOAA Atlas 14 document for more information. Back to Top PF graphical 10-000 1-000 41 c 311016R. e O 'a U 0-010 a 0 001 PDS-based intensity -duration -frequency (IDF) curves Latitude: 36.07131, Longitude:-8D.34971 -- -- - -- --- -- c c 6- L L L L L mo m -fog N fR -fog -fog m ry hl f�5 O W r-q N f�1 1� O O O U' O � � rn ID r-q N rn v 4n Du ration 1t7iaVOa e 1-coo 41 c 3110OR c O a 0-010 a 0.001 1 1 1 1 1 1 1 L 1 2 5 10 25 50 100 200 500 1000 Average recurrence interval (years) NOAA Atlas 14, Volume 2, Version 3 Created (GMT): Tue Aug 10 18:50:53 2021 Back to Top Maps & aerials Small scale terrain Average recurrence inlenral {years) — 1 2 — 5 25 50 100 200 500 1000 Duration — "kn — 2-day 1Q-min — 3-day 15-min — 4-day — 30�-min — 7-day - 6Q-rnm — 1 d-eay — 2-nr — 20-clay — 3-hr — 30-clay — 6-1hr — 45-day — 12-hr — 6o-clay 24-hr Lewisville 3km I I 2mi Larga scale terrain Lynchburg Roanoke rr - Bristol Duiliam • k1l: r1itdlell Ireensboro Raleigh NORTH C A R 0 L I N A �-h a ri otte 100km Fayettey i I I 60mi Large scale map Blacksburg Roanoke inston _IeM Greensboro :10hinson q�ty !Raleigh jAshev�He North Carolina art Otte Fa We 100km 60mi Large scale aerial Back to Top US Department of Commerce National Oceanic and Atmospheric Administration National Weather Service National Water Center 1325 East West Highway Silver Spring, MD 20910 Questions?: HDSC.Questions@noaa.gov Disclaimer APPENDIX B Frepared By: mrjohnson Date: 10/14/2021 Software Utilized: Excel, NA Green Website & Hydraflow Express Prepared By: Date: Method mrjohnson 10/14/2021 Assumptions mrjohnson 10/14/2021 Input mrjohnson 10/14/2021 Output mrjohnson 10/14/2021 I Checked By: ereichenbach I Date: 11/2/2021 I Reviewed By: I Date: ereichenbach 1 11/2/2021 I ereichenbach 1 11/2/2021 1 ereichenbach 111/2/2021 I ereichenbach 11/2/2021 EROSION CONTROL CALCULATIONS DRAINAGE AREA MAP NORTH I � a i REFERENCE 1. EXISTING SITE BOUNDARY AND TOPOGRAPHICAL INFORMATION PROVIDED BY VULCAN MATERIALS COMPANY, INC. ON AUGUST 2, 2021. //o PC Lit 780 /GRADING STAGES 1-4 SOUTH EAST TEMP. DITCH DA 3.5 ACRES 1 ' 120 GRADING STAGES 1-4 SOUTH WEST TEMP. DITCH i ( ' DA - 5.6 ACRES >10 \ I 1 11 I l l l l j Illj�j j ST/�ES 1-4 SEDIMENT SUMP DA - 10.75 ACRES II I ^ 800/ _ \ r I I ; GAR Sic E 3 = NORTH CAROLINA BOARD OF EXAMINERS FOR ENGINEERS AND SURVEYORS LICENSE NO. C-3035 VULCAN MATERIALS COMPANY WINSTON-SALEM 421 QUARRY ` PIT DEWATERING 3701 Arco Corporate Drive Suite 400 Charlotte, NC 28273 WINSTON-SALEM, NORTH CAROLINA SCALE IN FEET Ph: 980.237.0373 • Fax: 980.237.0372 GRADING STAGES 1-4 www.cecinc.com DRAINAGE AREAS 0 100 200 DRAWN BY: MRJ CHECKED BY: ERR APPROVED BY: SWW I FIGURE NO.: DATE: OCTOBER 20211 DWG SCALE: 1 "=100 PROJECT NO: 314-51 1 1 NORTH I I / \ / 1 61 r. I REFERENCE 1. EXISTING SITE BOUNDARY AND TOPOGRAPHICAL INFORMATION PROVIDED BY VULCAN MATERIALS COMPANY, INC. ON AUGUST 2, 2021. _1 �r;1IIl% o GRADING STAGES 5 TEMPORARY DITCH DA = 9.5 ACRES ` GRADING STAGES 5 SEDIMENT SUMP DA = 1.5 ACRES 1,790 Ij r 1 I r CA Sic E - 3 = NORTH CAROLINA BOARD OF EXAMINERS FOR ENGINEERS AND SURVEYORS LICENSE NO. C-3035 VULCAN MATERIALS COMPANY WINSTON-SALEM 421 QUARRY ` PIT DEWATERING 3701 Arco Corporate Drive Suite 400 Charlotte, NC 28273 WINSTON-SALEM, NORTH CAROLINA SCALE IN FEET Ph: 980.237.0373 • Fax: 980.237.0372 GRADING STAGE 5 www.cecinc.com DRAINAGE AREAS 0 100 200 DRAWN BY: MRJ CHECKED BY: ERR APPROVED BY: SWW I FIGURE NO.: DATE: OCTOBER 20211 DWG SCALE: 1 "=100 1 PROJECT NO: 314-51 1 2 NORTH - -I II II III II / l I K%N\� ��,�`,_�, - ___ ---- __--.780 -\�-- WWI, r REFERENCE 1. EXISTING SITE BOUNDARY AND TOPOGRAPHICAL INFORMATION PROVIDED BY VULCAN MATERIALS COMPANY, INC. ON AUGUST 2, 2021. _ r---------- 760------------- "I 759 — _=— 760 ----—770 Teo— \ \ \� -0 - ��/)��+� ol %i FINAL GRADING �r - i IIII/ l l/ i �> �iti • / I r %�' ` PERMANENT DRCH , / / / f � I I i � �. • �— � \ � r �� j DA = 10.75 ACRES / / r r I I r NORTH CAROLINA BOARD OF EXAMINERS FOR ENGINEERS AND SURVEYORS LICENSE NO. C-3035 VULCAN MATERIALS COMPANY WINSTON-SALEM 421 QUARRY ` PIT DEWATERING 3701 Arco Corporate Drive Suite 400 Charlotte, NC 28273 WINSTON-SALEM, NORTH CAROLINA SCALE �N FEET Ph: 980.237.0373 • Fax: 980.237.0372 FINAL GRADING www.cecinc.com DRAINAGE AREAS 0 100 200 DRAWN BY: MRJ CHECKED BY: ERR APPROVED BY: SWW I FIGURE NO.: DATE: OCTOBER 20211 DWG SCALE: 1 "=100 PROJECT NO: 314-51 1 3 1 "oo,—Boo % � I I I \ � ✓�v� CHANNEL CALCULATIONS Hydrology Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Grading Stages 1-4 SE Temporary Ditch Hydrograph type = Rational Peak discharge (cfs) Storm frequency (yrs) = 25 Time interval (min) Drainage area (ac) = 3.500 Runoff coeff. (C) Rainfall Inten (in/hr) = 7.593 Tc by User (min) OF Curve = Winston Salem, NC (2021),IDF Rec limb factor Q (cfs) 18.00 15.00 12.00 •M .M 3.00 0.00 -9 0 Runoff Hyd - Qp = 15.95 (cfs) Runoff Hydrograph 25-yr frequency 5 Friday, Oct 15 2021 = 15.95 = 1 = 0.6 = 5 = 1.00 Hydrograph Volume = 4,784 (cuft); 0.110 (acft) Q (cfs) 18.00 15.00 12.00 M 3.00 N- 0.00 10 Time (min) Channel Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Grading Stages 1-4 SE Temporary Ditch Triangular Side Slopes (z:1) = 2.00, 2.00 Total Depth (ft) = 2.00 Invert Elev (ft) = 100.00 Slope (%) = 2.00 N-Value = 0.030 Calculations Compute by: Known Q Known Q (cfs) = 15.95 Highlighted Depth (ft) Q (cfs) Area (sqft) Velocity (ft/s) Wetted Perim (ft) Crit Depth, Yc (ft) Top Width (ft) EGL (ft) Friday, Oct 15 2021 = 1.29 = 15.95 = 3.33 = 4.79 = 5.77 = 1.32 = 5.16 = 1.65 Elev (ft) Section Depth (ft) 103.00 3.00 102.50 2.50 102.00 2.00 101.50 101.00 1.50 1.00 100.50 0.50 100.00 00 rf) —1 0.00 0 50 1 2 3 4 5 6 7 Reach (ft) 8 9 10 Hydrology Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Grading Stages 1-4 SW Temporary Ditch Hydrograph type = Rational Peak discharge (cfs) Storm frequency (yrs) = 25 Time interval (min) Drainage area (ac) = 5.600 Runoff coeff. (C) Rainfall Inten (in/hr) = 7.593 Tc by User (min) OF Curve = Winston Salem, NC (2021),IDF Rec limb factor Q (cfs) 28.00 24.00 20.00 16.00 12.00 MiZ1l 0.00 it 0 Runoff Hyd - Qp = 25.51 (cfs) Runoff Hydrograph 25-yr frequency 5 Friday, Oct 15 2021 = 25.51 = 1 = 0.6 = 5 = 1.00 Hydrograph Volume = 7,654 (cuft); 0.176 (acft) Q (cfs) 28.00 24.00 20.00 16.00 12.00 M 4.00 N- 0.00 10 Time (min) Channel Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Grading Stages 1-4 SW Temporary Ditch Triangular Side Slopes (z:1) = 2.00, 2.00 Total Depth (ft) = 2.00 Invert Elev (ft) = 100.00 Slope (%) = 2.00 N-Value = 0.030 Calculations Compute by: Known Q Known Q (cfs) = 25.51 Highlighted Depth (ft) Q (cfs) Area (sqft) Velocity (ft/s) Wetted Perim (ft) Crit Depth, Yc (ft) Top Width (ft) EGL (ft) Friday, Oct 15 2021 = 1.54 = 25.51 = 4.74 = 5.38 = 6.89 = 1.59 = 6.16 = 1.99 Elev (ft) Section Depth (ft) 103.00 3.00 102.50 2.50 102.00 101.50 2.00 1.50 101.00 1.00 100.50 0.50 100.00 00 FA- 0.00 0 50 1 2 3 4 5 6 7 Reach (ft) 8 9 10 Hydrology Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Grading Stage 5 Temporary Ditch Friday, Oct 15 2021 Hydrograph type = Rational Peak discharge (cfs) = 43.28 Storm frequency (yrs) = 25 Time interval (min) = 1 Drainage area (ac) = 9.500 Runoff coeff. (C) = 0.6 Rainfall Inten (in/hr) = 7.593 Tc by User (min) = 5 OF Curve = Winston Salem, NC (2021),IDF Rec limb factor = 1.00 Q (cfs) 50.00 40.00 O e Il 20.00 10.00 0.00 � 0 Runoff Hyd - Qp = 43.28 (cfs) Runoff Hydrograph 25-yr frequency 5 Hydrograph Volume = 12,984 (cuft); 0.298 (acft) Q (cfs) 50.00 40.00 30.00 20.00 10.00 N- 0.00 10 Time (min) Channel Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Grading Stage 5 Temporary Ditch Triangular Side Slopes (z:1) = 2.00, 2.00 Total Depth (ft) = 2.00 Invert Elev (ft) = 100.00 Slope (%) = 4.50 N-Value = 0.030 Calculations Compute by: Known Q Known Q (cfs) = 43.28 Highlighted Depth (ft) Q (cfs) Area (sqft) Velocity (ft/s) Wetted Perim (ft) Crit Depth, Yc (ft) Top Width (ft) EGL (ft) Friday, Oct 15 2021 = 1.61 = 43.28 = 5.18 = 8.35 = 7.20 = 1.97 = 6.44 = 2.69 Elev (ft) Section Depth (ft) 103.00 3.00 102.50 2.50 102.00 2.00 101.50 101.00 1.50 1.00 100.50 0.50 100.00 00 FA- 0.00 0 50 1 2 3 4 5 6 7 Reach (ft) 8 9 10 Hydrology Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Friday, Oct 15 2021 Final Grading Permanent Ditch Hydrograph type = Rational Peak discharge (cfs) = 20.41 Storm frequency (yrs) = 25 Time interval (min) = 1 Drainage area (ac) = 10.750 Runoff coeff. (C) = 0.25 Rainfall Inten (in/hr) = 7.593 Tc by User (min) = 5 OF Curve = Winston Salem, NC (2021),IDF Rec limb factor = 1.00 Q (cfs) 21.00 18.00 15.00 12.00 •M .M M1111l 0.00 0 Runoff Hyd - Qp = 20.41 (cfs) Runoff Hydrograph 25-yr frequency 5 Hydrograph Volume = 6,122 (cuft); 0.141 (acft) Q (cfs) 21.00 18.00 15.00 12.00 9.00 6.00 3.00 0.00 10 Time (min) Channel Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Final Grading Permanent Ditch Triangular Side Slopes (z:1) = 2.00, 2.00 Total Depth (ft) = 2.00 Invert Elev (ft) = 100.00 Slope (%) = 2.00 N-Value = 0.030 Calculations Compute by: Known Q Known Q (cfs) = 20.41 Highlighted Depth (ft) Q (cfs) Area (sqft) Velocity (ft/s) Wetted Perim (ft) Crit Depth, Yc (ft) Top Width (ft) EGL (ft) Friday, Oct 15 2021 = 1.41 = 20.41 = 3.98 = 5.13 = 6.31 = 1.46 = 5.64 = 1.82 Elev (ft) Section Depth (ft) 103.00 3.00 102.50 2.50 102.00 2.00 101.50 101.00 1.50 1.00 100.50 0.50 100.00 00 r1f) 0.00 0 50 1 2 3 4 5 6 7 Reach (ft) 8 9 10 10/15/21, 9:22 AM NORTH AMERICAN GREEN' CHANNEL ANALYSIS > > > Final Grading Permanent Ditch Name Final Grading Permanent Ditch Discharge 20.41 Channel Slope 0.02 Channel Bottom Width 0 Left Side Slope 2 Right Side Slope 2 Low Flow Liner Retardence Class C 6-12 in Vegetation Type Mix (Sod and Bunch) Vegetation Density Good 65-79% Soil Type Sandy Loam (GM) SC250 ECMDS 7.0 North American Green 5401 St. Wendel-Cynthiana Rd. Poseyville, Indiana 47633 Tel. 800.772.2040 >Fax 812.867.0247 www.nagreen.com ECMDS v7.0 Normal Permissible Calculated Safety Staple Phase Reach Discharge Velocity Mannings N Remarks Depth Shear Stress I Shear Stress Factor Pattern SC250 Straight 20.41 cfs 4.56 ft/s 1.49 ft 0.035 3 Ibs/ft2 1.87 Ibs/ft2 1.61 STABLE E Unvegetated Underlying Straight 20.41 cfs 4.56 ft/s 1.49 ft 0.035 2.84 Ibs/ft2 0.83 Ibs/ft2 3.41 STABLE E Substrate SC250 Straight 20.41 cfs 3.61 ft/s 1.68 ft 0.048 10 Ibs/ft2 2.1 Ibs/ft2 4.77 STABLE E Reinforced Vegetation Underlying Straight 20.41 cfs 3.61 ft/s 1.68 ft 0.048 5.06 Ibs/ft2 0.94 Ibs/ft2 5.39 STABLE E Substrate SC150 Normal Permissible Calculated Safety Remarks Staple Phase Reach Discharge Velocity Depth Mannings N Shear Stress Shear Stress Factor Pattern SC150 Straight 20.41 cfs 4.42 ft/s 1.52 ft 0.037 2 Ibs/ft2 1.89 Ibs/ft2 1.06 STABLE D Unvegetated Underlying Straight 20.41 cfs 4.42 ft/s 1.52 ft 0.037 1.89 Ibs/ft2 0.85 Ibs/ft2 2.24 STABLE D Substrate S150 Normal Permissible Calculated Safety Staple Phase Reach Discharge Velocity Mannings N Remarks Depth Shear Stress I Shear Stress Factor Pattern S150 Straight 20.41 cfs 4.42 ft/s 1.52 ft 0.037 1.8 Ibs/ft2 1.89 Ibs/ft2 0.95 UNSTABLE D Unvegetated Underlying Straight 20.41 cfs 4.42 ft/s 1.52 ft 0.037 1.7 Ibs/ft2 0.85 Ibs/ft2 2.01 STABLE D Substrate Unreinforced Vegetation Normal Permissible Calculated Safety Remarks Staple Phase Reach Discharge Velocity Depth Mannings N Shear Stress Shear Stress Factor Pattern lnreinforced Straight 20.41 cfs 3.61 ft/s 1.68 ft Vegetation Underlying Straight 20.41 cfs 3.61 ft/s 1.68 ft Substrate 0.048 4lbs/ft2 2.1lbs/ft2 1.91 STABLE 0.048 3.61lbs/ft2 0.941bs/ft2 3.85 STABLE https://ecmds.com/project/l49917/channel-analysis/212391 /show 1/2 SLOPE DRAIN CALCULATIONS Channel Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Friday, Oct 15 2021 Slope Drain (Flow From East & West Ditches, Stages 1-4) Circular Highlighted Diameter (ft) = 1.50 Depth (ft) = 0.69 Q (cfs) = 41.46 Area (sqft) = 0.80 Invert Elev (ft) = 100.00 Velocity (ft/s) = 51.92 Slope (%) = 50.00 Wetted Perim (ft) = 2.24 N-Value = 0.010 Crit Depth, Yc (ft) = 1.50 Top Width (ft) = 1.50 Calculations EGL (ft) = 42.61 Compute by: Known Q Known Q (cfs) = 41.46 Elev (ft) Section 102.00 101.50 101.00 100.50 100.00 99.50 0 1 2 3 Reach (ft) 18" Slope Drain Rip -Rap Dissipator By: MRJ Date: 9 27 2021 Checked By: ERR Date: 10/15/2021 3 0 Runoff Discharge Information Outlet W + L;: po a 90 Q10 = 41.46 ct's Pipe diameter (Do) JET, Il Pipe Dia. = 18 in. faT 80 ,. • . i water 0.5Do :I A ron Sizingdal rr� 7 I ". I Length = 26 ft. pr P 60 . .:... �L : Width = 27.5 ft. et'g j I:I� ., i 3Do @Pipe = 4.5 ft. 50 r�tnV�� t I•- 'I O D . Ri ra Stone Sizing(d50) 4 I 1-s s + pp 4 _ I Ty d50 Size (Avg) = 16.8 in. Using D50 Size= l8m 3 Is I - I-. Z a d50 Size (Max.)* 25.2 in. Min. Depth = 38" .. i 1+ I Min. Depth** = 37.8 in. 20 * equal to 1.5*d50 average stone size TI, i - • , 3 ** min. depth no less than 15"— NOTES: D f � -; rb N 1.0 Riprap aprons to be sized for 10-year discharge rate from each storm pipe discharge location, I I } 2 including sediment basins. } j k 4€p' a I n Cd a 2.0 Min. depth shall be equal to 1.5 *d50 maximum riprap stone size, but in no case shall be less than i . I ' V , aC 15" in depth. v 1 `n 15 a' I; , _'is - I 3.0 Abbreviations: v 10 d I La = Length of riprap apron in feet (determined from chart)(10' min.) - Do = Size of outlet pipe (discharge pipe from storm drainage system in feet or inches) W = Width of riprap apron in feet (at end furthest from outlet pipe discharge) 0 3Do =Width of riprap apron in feet at outlet pipe) 3 5 10 20 50 100 200 500 1000 p P ( pP ) d50 = Size of stone in feet Discharge (f13/Sec) CULVERT CALCULATIONS Channel Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. RCP Culvert (Pump Flow 100 GPM) Circular Diameter (ft) = 1.50 Invert Elev (ft) = 752.00 Slope (%) = 8.90 N-Value = 0.130 Calculations Compute by: Known Q Known Q (cfs) = 0.25 Elev (ft) 754.00 753.50 753.00 752.50 752.00 751.50 Highlighted Depth (ft) Q (cfs) Area (sqft) Velocity (ft/s) Wetted Perim (ft) Crit Depth, Yc (ft) Top Width (ft) EGL (ft) Section Friday, Oct 15 2021 = 0.29 = 0.250 = 0.24 = 1.03 = 1.37 = 0.19 = 1.19 = 0.31 0 1 2 3 Reach (ft) POLISHING BASIN CALCULATIONS CIVIL & ENVIRONMENTAL CONSULTANTS, INC. Project Name: Vulcan 421 Quarry CEC Project No.: 314-511 Description: Polishing Basin Provided Volume Sizine By: MRJ Date: 9 27 2021 Checked By: ERR Date: 10/15/2021 PROVIDED VOLUME Elevation Area Inc. Vol. Acc Vol. 752.00 1,200 0 0 Bottom of Basin 754.00 2,272 3,415 3,415 756.00 3,568 5,791 9,207 Top of Basin Total PROVIDED Sediment Basin Volume (cubic feet) Tntml PRnvinFn iPrilmPnt Rmcin Aram /cmjmra faatl 9,207 3.569 SKIMMER ORIFICE SIZE 9,206.91 Provided Volume (cfs) 3.30 Dewatering Time (days) 285,120.00 Dewatering Time (sec) 0.03 Q = Flow (cfs) 2.00 Skimmer Size (In) 2.o h = Head on Skimmer (in) 2.41 A = Area of Orifice (in) 0.88 r = Orifice radius (in) 1.75 d = Orifice Diameter (in) Orifice Equation: Q = CdA(2gh)1/2 Cd= 0.59 g = 32.2 Jsing 2" Skimmer with 1.75" Orifice 1 OF 1