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Home My WebLink About10153-AH-Permit_Drawings-090919SEA LEVEL NELSON BAY CORE S O U N D ATL A N TI C WHITE POINT MCOLF ATLANTIC MOR RI S M A RI N A R D CORE SOUND LOOP RD SEA S H O R E D R O L D C E D A R I S L A N D R D A T L A N T I C H A R B O R R E F U G E SITE ATLANTIC HARBOR MAINTENANCE DREDGING & LIVING SHORELINE CARTERET COUNTY, NORTH CAROLINA VICINITY MAP LOCATION MAP SITE ATLANTIC HARBOR MAINTENANCE DREDGING & LIVING SHORELINE MLLW MOFFATT & NICHOL CARTERET COUNTY NAVIGATION PROJECT SEPTEMBER 2019 10 COVER SHEET 1 NTS NTS INDEX OF DRAWINGS SHEET NO.SHEET TITLE 1 COVER SHEET 2 SITE PLAN 3 DREDGE PLAN 4 USACE AUTHORIZED NAVIGATION CHANNEL 5 MATERIAL DISPOSAL PLAN 6 LIVING SHORELINE PLAN 7 LIVING SHORELINE GRADING PLAN 8 TYPICAL DREDGE SECTIONS 9 GRANITE ROCK SILL DETAILS 10 DETAILS WHITE POINT DREDGE MATERIAL PLACEMENT SITE, SEE SHEET 5 15' BREAK FOR TIDAL FLUSHING AND FISH PASSAGE ENGINEERED WAVE ATTENUATORS, TYP (SEE DETAIL, SHT 9) APPROX LIMITS OF DREDGING INCLUDING SIDE SLOPE, TYP GRANITE ROCK SILL N:422,467 E:2,799,251 USACE SETBACK LINE N:424,107 E:2,799,831 N:424,411 E:2,799,201 N:423,925 E:2,800,003 N:423,880 E:2,800,024 N:423,583 E:2,799,981 CHANNEL BASE IMPACT AREA 6+008+0010+0012+0014+0016+0018+0020+0022+002 4 + 0 0 32 + 0 0 30 + 0 0 28 + 0 0 26 + 0 0 ATLANTIC HARBOR MAINTENANCE DREDGING & LIVING SHORELINE MLLW MOFFATT & NICHOL CARTERET COUNTY NAVIGATION PROJECT SEPTEMBER 2019 10 SITE PLAN 2 LEGEND DREDGE IMPACT LIMITS USACE SETBACK LINE MAINTENANCE CHANNEL BASELINE MAINTENANCE CHANNEL BASE IMPACT AREA MAINTENANCE CHANNEL SIDE SLOPE IMPACT AREA GRANITE ROCK SILL 150'0'150'300' SCALE: 1''=300' WAVE ATTENUATOR CONSTRUCTION NOTES: 1. 2. ATTENUATORS SHOULD BE CONSTRUCTED SIDE BY SIDE TO SPAN 25' IN TOTAL LENGTH PER STRUCTURE. ATTENTUATORS SHOULD BE CENTERED ON THE 15' TIDAL GAP TO ENSURE A 5' OVERLAP OF THE GRANITE ROCK SILL STRUCTURE PER SIDE. 3. ATTENUATOR STRUCTURE SHOULD BE POSITIONED 5' SEAWARD OF THE GRANITE ROCK SILL. WHITE POINT DREDGE MATERIAL PLACEMENT SITE, SEE SHEET 5 USACE SETBACK LINE 6+008+0010+0012+0014+0016+0018+0020+0022+002 4 + 0 0 32 + 0 0 30 + 0 0 28 + 0 0 26 + 0 0 N:422,467 E:2,799,251 N:424,411 E:2,799,201 APPROX LIMITS OF DREDGING INCLUDING SIDE SLOPE, TYP CHANNEL BASE IMPACT AREA N:424,107 E:2,799,831 N:423,925 E:2,800,003 N:423,880 E:2,800,024 N:423,583 E:2,799,981 Maintenance Dredge Control Table Station Azimuth (˚)Depth (MLLW)Width (FT)Side Slope (H':V')Dredge Density (cy/ft) Cummulative Volume (CY) 6+00 123.17 -6 MLLW +1 40 5:1 0.6 7+00 123.17 -6 MLLW +1 40 5:1 0.8 59 8+00 123.17 -6 MLLW +1 40 5:1 1.0 156 9+00 123.17 -6 MLLW +1 40 5:1 1.3 268 10+00 123.17 -6 MLLW +1 40 5:1 1.4 401 11+00 123.17 -6 MLLW +1 40 5:1 1.7 555 12+00 123.17 -6 MLLW +1 40 5:1 3.4 808 13+00 123.17 -6 MLLW +1 40 5:1 6.5 1,304 14+00 123.17 -6 MLLW +1 40 5:1 9.1 2,084 15+00 123.17 -6 MLLW +1 40 5:1 8.5 2,961 16+00 123.17 -6 MLLW +1 40 5:1 8.2 3,795 17+00 123.17 -6 MLLW +1 40 5:1 7.6 4,588 18+00 123.17 -6 MLLW +1 40 5:1 8.0 5,369 19+00 110.83 -6 MLLW +1 40 5:1 10.2 6,280 20+00 98.66 -6 MLLW +1 40 5:1 9.7 7,278 21+00 98.66 -6 MLLW +1 40 5:1 10.3 8,276 22+00 81.71 -6 MLLW +1 36.6 5:1 10.0 9,291 22+50 55.7 -6 MLLW +1 20.2 3:1 5.8 9,687 23+00 46.53 -5 MLLW +1 25 3:1 4.9 9,955 24+00 46.53 -5 MLLW +1 30 3:1 4.1 10,403 25+00 36.15 -5 MLLW +1 45.7 5:1 4.0 10,807 26+00 25.77 -5 MLLW +1 55 5:1 3.0 11,156 27+00 25.77 -5 MLLW +1 190 5:1 6.2 11,615 28+00 25.77 -5 MLLW +1 190 5:1 5.0 12,174 29+00 25.77 -5 MLLW +1 190 5:1 3.8 12,615 30+00 25.77 -5 MLLW +1 190 5:1 3.2 12,966 31+00 25.77 -5 MLLW +1 190 5:1 0.6 13,159 32+00 25.77 -5 MLLW +1 190 5:1 1.1 13,247 ATLANTIC HARBOR MAINTENANCE DREDGING & LIVING SHORELINE MLLW MOFFATT & NICHOL CARTERET COUNTY NAVIGATION PROJECT SEPTEMBER 2019 10 DREDGE PLAN 3 150'0'150'300' SCALE: 1''=300' NOTE: SEE SHEET 7 FOR TYPICAL SECTION VIEWS OF DREDGE CHANNEL. LEGEND DREDGE IMPACT LIMITS USACE SETBACK LINE MAINTENANCE CHANNEL BASELINE MAINTENANCE CHANNEL BASE IMPACT AREA MAINTENANCE CHANNEL SIDE SLOPE IMPACT AREA USACE AUTHORIZED NAVIGATION CHANNEL (BASE) USACE SETBACK LINE N:422,467 E:2,799,251 N:424,411 E:2,799,201 6+008+0010+0012+0014+0016+0018+0020+0022+002 4 + 0 0 32 + 0 0 30 + 0 0 28 + 0 0 26 + 0 0 MAINTENANCE CHANNEL BASE (IMPACT AREA) N:424,107 E:2,799,831 N:423,925 E:2,800,003 N:423,880 E:2,800,024 N:423,583 E:2,799,981 ATLANTIC HARBOR MAINTENANCE DREDGING & LIVING SHORELINE MLLW MOFFATT & NICHOL CARTERET COUNTY NAVIGATION PROJECT SEPTEMBER 2019 10 USACE AUTHORIZED NAVIGATION CHANNEL 4 150'0'150'300' SCALE: 1''=300' LEGEND USACE AUTHORIZED NAVIGATION CHANNEL (BASE) USACE SETBACK LINE MAINTENANCE CHANNEL BASELINE MAINTENANCE CHANNEL BASE (IMPACT AREA) APPROXIMATE MHW LINE OUTER LIMIT OF FILL PLACEMENT, 30' OFFSET FROM EXISTING MHW OR LANDWARD OF PLANTING LIMITS DREDGE MATERIAL PLACEMENT SITE APPROX LIMITS OF DREDGING INCLUDING SIDE SLOPE, TYP (3)(4) (2) (1) (0) (-4 ) (3 )(3) S F SFSFSFSFSFMHWMHWMHWMHWMHWMHW MHW MHWMHWMHWMHWMHWMHWMHWSF SF SFSFSFSFSFSFSFSF(-1) (-2) (-3)16"20"EXISTING GROUND OVERLAND FLOW WOVEN WIRE FENCE (14 1/2 GA MIN, MAX 6" MESH SPACING) WITH FILTER CLOTH OVER . EMBED FILTER CLOTH MIN 8" INTO GROUND 3'-0" MIN STEEL FENCE POST 10' MAX POST SPACING TYPICAL SILT FENCE 1.ALL MATERIAL EXCAVATED FROM CHANNEL SHALL BE TRANSPORTED TO PLACEMENT AREA. ANY MISPLACED MATERIALS SHALL BE IMMEDIATELY REGATHERED AND TRANSPORTED TO THE MATERIAL PLACEMENT AREA. 2.MATERIAL SHALL BE PLACED WITHIN THE LIMITS AND PLACEMENT LINES AS SHOWN IN THE PLANS AS PRACTICALLY AS POSSIBLE. PLACED MATERIAL SHALL BE GRADED TO PROHIBIT WATER PONDING. 3.ALL ELEVATIONS SHOWN ARE REFERENCED TO MEAN LOWER LOW WATER (MLLW). 4.THE TOPOGRAPHY PRESENTED ON THE MATERIAL PLACEMENT SITE AND SECTIONS IS BASED ON 2018 SURVEYS COMPLETED BY GEODYNAMICS LLC AND CAN ONLY BE CONSIDERED REPRESENTATIVE OF THAT TIME. 1.CONTRACTOR SHALL INSTALL TEMPORARY SILT FENCE AROUND LIMITS OF FILL AS SHOWN ON MATERIAL PLACEMENT AREA SECTION OF SHEET 10. APPROXIMATE ACREAGE FOR MATERIAL PLACEMENT WITHIN SILT FENCE IS 2.7 AC. 2.DREDGED MATERIAL SHALL BE PLACED AS FAR AWAY FROM SILT FENCE AS PRACTICLE AND SPREADING OPERATIONS CONDUCTED AS TO ENCOURAGE AS MUCH SETTLING OF SEDIMENTS AS REASONABLE. 3.CONTRACTOR SHALL INSPECT SILT FENCE DAILY AND ALERT ENGINEER OF ANY ISSUES WITH PERFORMANCE OR UNACCEPTABLE SEDIMENT DISCHARGES. 4.SILT FENCING MAY NOT BE REMOVED UNTIL ALL CONTRIBUTING UPGRADIENT AREAS ARE STABILIZED. 5.SILT FENCE SHALL BE PLACED NO CLOSER THAN 30' FROM MHW OR ALONG FUTURE PLANTING LIMITS. MHW LINE SHOWN ON DRAWINGS IS APPROXIMATE. CONTRACTOR SHALL HAVE EXISTING MHW LINE SURVEYED BEFORE CONSTRUCTION COMMENCES TO VERIFY ALLOWABLE SILT FENCE LOCATION. SEDIMENT & EROSION CONTROL NOTES: ATLANTIC HARBOR MAINTENANCE DREDGING & LIVING SHORELINE MLLW MOFFATT & NICHOL CARTERET COUNTY NAVIGATION PROJECT SEPTEMBER 2019 10 MATERIAL PLACEMENT SITE 5 50'0'50'100' SCALE: 1''=100' MATERIAL PLACEMENT AREA NOTES: LEGEND DREDGE IMPACT LIMITS APPROX. SILT FENCE INSTALLATION LOCATION MEAN HIGH WATER LINE (APPROX.) SF MHW USACE SETBACK LINE ENGINEERED WAVE ATTENUATORS (6 TOTAL), SEE SHEET 9 GRANITE ROCK SILL ATLANTIC HARBOR MAINTENANCE DREDGING & LIVING SHORELINE MLLW MOFFATT & NICHOL CARTERET COUNTY NAVIGATION PROJECT SEPTEMBER 2019 10 LIVING SHORELINE PLAN 6 60'0'60'120' SCALE: 1''=120' LEGEND GRANITE ROCK SILL CENTERLINE GRANITE ROCK PLACEMENT LIMITS USACE SETBACK LINE GRANITE ROCK SILL SLOPE FROM +2.0' TO 0.0 MLLWATLANTIC HARBOR MAINTENANCE DREDGING & LIVING SHORELINE MLLW MOFFATT & NICHOL CARTERET COUNTY NAVIGATION PROJECT SEPTEMBER 2019 10 PRE & POST CONSTRUCTION GRADING CONTOURS LIVING SHORELINE 7 EXISTING CONTOURS POST CONSTRUCTION GRADING SCALE: 1"=120'-0"SCALE: 1"=120'-0" 60'0'60'120' SCALE: 1''=120' NOTE: MATERIAL PLACEMENT FROM MAINTENANCE DREDGING NOT CONSIDERED IN POST CONSTRUCTION GRADING. ATLANTIC HARBOR MAINTENANCE DREDGING & LIVING SHORELINE MLLW MOFFATT & NICHOL CARTERET COUNTY NAVIGATION PROJECT SEPTEMBER 2019 10 8TYPICAL DREDGE SECTIONS NTS 5'-0" 2 MHW EL= 0.68 MLW 1 EL +2.0 1 2 8'-6"8'-6" 0+25 - 4+00 TYPICAL DESIGN FILTER CLOTH 6" NCDOT CLASS A RIPRAP BEDDING STONE EL -1.5, TYP EL -2.0, TYP ℄ 2 1 120,1$//%*5$1,7(7<3 10:1 SLO P E EL +2.0 BACKFILL EXISTING GROUND (VARIES) NTS LANDWARD EXISTING GRADE (VARIES) EL 0.0 MARSH RESTORATION AREA (REF. NOTES) 6'-0" 2MHW EL= 0.68 MLW 1 EL +2.0 12'-0"12'-0" 120,1$//%*5$1,7(7<3 4+50 - 17+45 TYPICAL DESIGN FILTER CLOTH 6" NCDOT CLASS A RIPRAP BEDDING STONE 1 2 EL -3.0, TYP ℄ 9 1 EL +2.0 20:1 SLOPE LANDWARD BACKFILL EL 0.0 EXISTING GROUND (VARIES) NTS EXISTING GRADE (VARIES) MARSH RESTORATION AREA (REF. NOTES) 15'-0" 2MHW EL= 0.68 MLW 1 EL +2.0 (TYP) 120,1$//% GRANITE STONE, TYP 15' BREAK TYPICAL DESIGN FILTER CLOTH 6" NCDOT CLASS A RIPRAP BEDDING STONE 1 2 ℄ NTS ENGINEERED WAVE ATTENUATOR TOP CLAMP TO BE DETERMINED AT TIME OF INSTALLATION 12" PLASTIC PILING CAP 12" HEAVY DUTY FIBERGLASS PILE@ 4' O.C. BOTTOM CONTOUR BASE CLAMP PILING DEPTH VARIES BASED ON SOIL BEARING CAPACITY MWH EL: 0.68 MLLW EL: 0.0 NTS WATER FLUSHING EL -4.06'EL +2.0 EXISTING GRADE (VARIES) ATLANTIC HARBOR MAINTENANCE DREDGING & LIVING SHORELINE MLLW MOFFATT & NICHOL CARTERET COUNTY NAVIGATION PROJECT SEPTEMBER 2019 10 GRANITE ROCK SILL DETAILS NTS 9 1.MARSH RESTORATION AREA TO BE BACKFILLED AS SHOWN ON DRAWINGS UP TO THE EXISTING +2.0 MLLW CONTOUR. 2.MARSH VEGETATION TO BE PLANTED IN ACCORDANCE WITH THE NORTH CAROLINA COASTAL FEDERATION RECOMMENDATIONS. EXPECTATIONS SUGGEST SPARTINA TYPE VEGETATION AT 9-INCH CENTERS WITHIN BACKFILL AREA. MARSH RESTORATION AREA: 3:1 3:1 FILL DREDGE MATERIAL, NOT TO EXCEED 3.5' ABOVE EXISTING GRADE (MAX ELEV +7.5' MLLW) MATERIAL PLACEMENT AREA SCALE: 1"=10'-0" 5'-0" EL +2.0 8'-6"8'-6" EL -1.5 EL -2.0 ℄ 10:1 SLOP E BACKFILL 6'-0" 12'-0"12'-0" ℄ EL +2.0 20:1 SLOPE BACKFILL MHW EL= 0.68 MLLW EL +2.0 EL -1.5 EL -2.0 MHW EL= 0.68 MLLW SILT FENCE 30' FROM MHW OR LANDWARD PLANTING LIMITS MARSH VEGETATION TO BE PLANTED IN ACCORDANCE WITH THE NORTH CAROLINA COASTAL FEDERATION RECOMMENDATIONS (EXPECTATIONS SUGGEST SPARTINA VEGETATION AT 9-INCH CENTERS.) HARBOR SIDE STA 0+25- 4+00 SOUND SIDE STA 4+50- 17+35 ATLANTIC HARBOR MAINTENANCE DREDGING & LIVING SHORELINE MLLW MOFFATT & NICHOL CARTERET COUNTY NAVIGATION PROJECT SEPTEMBER 2019 10 DETAILS 10 5'0'5'10' SCALE: 1''=10'