20171291 Ver 1_Stream Mitigation Site Plans_20190612

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S17S20S14S13S18S19FILE NAME:S:\@RES GIS\Projects\NC\Little Sebastian\CAD\DWG\675700_SHT_COVER.dwg SAVED BY: Tswartzfager
SHEET NUMBER:DESCRIPTIONMARKDATE
REVISIONS:
RELEASED FOR:PLOT DATE:PROJECT NUMBER:PROJECT MANAGER:DESIGNED:DRAWN:CHECKED:SEAL302 Jefferson Street, Suite 110Raleigh, NC 27605Main: 919.829.9909Fax: [phone]www.res.usRESOURCE ENVIRONMENTAL SOLUTIONS, LLC302 JEFFERSON ST, SUITE 110RALEIGH, NC 27605VICINITY MAPNTS0FULL SCALE: 1"= 2" = FULL SCALE1" = HALF SCALEJUNE 2019YADKIN RIVER BASIN: HUC 03040101080020SURRY COUNTY, NORTH CAROLINAGIDEON STREAM MITIGATION SITEDPITRSAFMCSC0405-PRELIMINARY - NOT FOR CONSTRUCTION 05/24/2019REACH JN6REACH MC2REACH JN4REACH JN5Sheet List TableSheet NumberSheet Title-COVERA1OVERALL AERIAL VIEWE1GENERAL NOTES & LEGENDE2EXISTING CONDITIONSS14REACH JN4S15REACH JN5S16REACH JN6S17REACH JN6S18REACH JN6S19REACH MC2S20REACH MC2S21REACH MC2F1FENCING PLANP1PLANTING PLAND1DETAILSD2DETAILSD3DETAILSD4DETAILSD5DETAILSD6DETAILSD7DETAILS
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LCELCE LCELCELCELCE1503001500FULL SCALE: 1"= 2" = FULL SCALE1" = HALF SCALEFILE NAME:S:\@RES GIS\Projects\NC\Little Sebastian\CAD\DWG\675700_SHT_COVER.dwg SAVED BY: Tswartzfager
DRAWING TITLE:
PROJECT NAME:SHEET NUMBER:DESCRIPTIONMARKDATE
REVISIONS:
RELEASED FOR:PLOT DATE:PROJECT NUMBER:PROJECT MANAGER:DESIGNED:DRAWN:CHECKED:SEAL302 Jefferson Street, Suite 110Raleigh, NC 27605Main: 919.829.9909Fax: [phone]www.res.usSURRY COUNTY, NORTH CAROLINA
OVERALL AERIAL VIEW
GIDEON STREAM MITIGATION SITE
BRCTRSAFMBPB0405A1PRELIMINARY - NOT FOR CONSTRUCTION 05/28/2019 REACH JN2REACH MC1REACH JN3REACH MC3REACH BS1REACH MC2REACH JN6REACH JN4REACH JN5LCELIMITS OF CONSERVATION EASEMENT(LITTLE SEBASTIAN STREAM MITIGATION SITE)LCELIMITS OF CONSERVATION EASEMENT(GIDEON MITIGATION SITE)LEGENDReachMitigation TypeProposedLength (LF)MitigationRatioSMUsJN4-AEnhancement III2131 : 5.043JN4-BEnhancement I2491 : 1.5166JN5Enhancement I2441 : 1.5163JN6-APreservation5081 : 10.051JN6-BEnhancement III7071 : 5.0141JN6-CRestoration641 : 1.064Restoration7361 : 1.0736Restoration4391 : 1.0439MC2-ARestoration1,0441 : 1.01,044MC2-BEnhancement III3561 : 5.071Enhancement III2221 : 5.044Total4,7822,962
SCALE: AS SHOWNFILE NAME:S:\@RES GIS\Projects\NC\Little Sebastian\CAD\DWG\675700_SHT_SITE.dwg SAVED BY: Tswartzfager
DRAWING TITLE:
PROJECT NAME:SHEET NUMBER:DESCRIPTIONMARKDATE
REVISIONS:
RELEASED FOR:PLOT DATE:PROJECT NUMBER:PROJECT MANAGER:DESIGNED:DRAWN:CHECKED:SEAL302 Jefferson Street, Suite 110Raleigh, NC 27605Main: 919.829.9909Fax: [phone]www.res.us5/24/2019PRELIMINARY - NOT FOR CONSTRUCTIONE10405BPBAFMTRSBRCGIDEON STREAM MITIGATION SITE
GENERAL NOTES & LEGEND
SURRY COUNTY, NORTH CAROLINA STREAM CONSTRUCTION NOTES:1.ALL PROPOSED CHANNELS AND TEMPORARY AND PERMANENT CROSSINGS SHALL BE CONSTRUCTED INA DRY CONDITION VIA OFFLINE CONSTRUCTION WHERE POSSIBLE. PUMP AROUND OPERATIONSSHOULD BE LIMITED TO AREAS WHERE THE EXISTING AND PROPOSED CHANNEL ALIGNMENTS OVERLAP.2.ALL IMPERVIOUS DIKES AND PUMPING APPARATUS SHALL BE REMOVED FROM THE STREAM AT THE ENDOF EACH DAY TO RESTORE NORMAL FLOW BACK TO THE CHANNEL UNLESS OTHERWISE APPROVED BYTHE ENGINEER. WITH APPROVAL, A PUMP AROUND MAY BE ALLOWED TO RUN CONTINUOUSLY IF THEREIS NO FORECAST FOR RAIN OVERNIGHT, AND/OR THE PUMP APPARATUS IS MAINTAINED ANDMONITORED CONTINUOUSLY.3.CONSTRUCT UPSTREAM PORTION OF THE CHANNEL FIRST, WORKING IN AN UPSTREAM TODOWNSTREAM DIRECTION, UNLESS OTHERWISE APPROVED BY THE ENGINEER.4.REMOVE AND STOCKPILE TOPSOIL WITHIN AREAS THAT ARE TO BE CUT 9" OR MORE BELOW EXISTINGGRADE. STOCKPILED TOPSOIL IS TO BE PLACED ALONG THE FLOODPLAIN BENCHES.5.STRUCTURES ARE TO BE INSTALLED IN LOCATIONS SHOWN ON PLAN SHEETS (AS INDICATED ON THESTRUCTURE TABLES) USING METHODS DESCRIBED IN THE DETAIL SHEETS. PRIOR TO FINE GRADING,OBTAIN APPROVAL OF THE ENGINEER ON INSTALLATION OF STRUCTURES.6.NATIVE SUBSTRATE MATERIAL SHALL BE TAKEN FROM THE EXISTING CHANNEL AND INSTALLED ON THEPROPOSED BED OF SHALLOW/RIFFLE CHANNEL SECTIONS. IN AREAS WHERE THERE IS NOT ENOUGHNATIVE SUBSTRATE TO PLACE A MINIMUM 6" LAYER ALONG PROPOSED SHALLOW/RIFFLE SECTIONS,SUPPLEMENT THE NATIVE SUBSTRATE WITH A 5050 MIX OF #3 AND SURGE, OR RIVER ROCK WITH AD50=2.0".7.IN-STREAM STRUCTURES PROPOSED ALONG THE OUTSIDE OF MEANDER BENDS (BRUSH TOES, LOGVANES, AND LOG TOES) MAY BE USED INTERCHANGEABLY THROUGHOUT THE PROJECT PER APPROVALFROM DESIGNER.8.UPON COMPLETION OF FINE GRADING, INSTALL STREAM BANK STABILIZATION INCLUDING, EROSIONCONTROL MATTING OR SOD MATS ALONG CHANNEL BANKS.9.FILL AND STABILIZE ABANDONED SEGMENTS OF THE EXISTING CHANNEL PER DIRECTION OF THEENGINEER.LEGENDTBBBOHEEXISTING TREELINELCELIMITS OF PROPOSEDCONSERVATION EASEMENT50465042EXISTING OVERHEAD ELECTRIC UTILITY LINEPROPOSED TOP OF BANKEXISTING FENCELINEEXISTING BOTTOM OF BANKEXISTING TOP OF BANKPROPOSED CONTOUR MINORPROPOSED CONTOUR MAJOREXISTING CONTOUR MINOREXISTING CONTOUR MAJOREXISTING WETLANDPROPOSED CHANNEL PLUG(SEE DETAIL D3)LOG SILL(SEE DETAIL D5)LOG STRUCTURE(PROFILE)LOG CROSS VANE(SEE DETAIL D5)PROPERTY LINEPROPOSED CENTERLINE OF CHANNELEXISTING TREEEXISTING STREAMTBTBBBBBROCK CROSS VANE(SEE DETAIL D6)ROCK STRUCTURE(PROFILE)BRUSH TOE PROTECTION(SEE DETAIL D3)LOG VANE(SEE DETAIL D4)CONSTRUCTED RIFFLE(SEE DETAIL D7)ROCK SILL(SEE DETAIL D6)STEP POOL(SEE DETAIL D6)LOG TOE PROTECTION(SEE DETAIL D3)RIFFLE GRADE CONTROL(SEE DETAIL D5)DIFFUSE FLOW STRUCTURE(SEE DETAIL D6)
OHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEWOODBUILDINGWOODSHEDWOODBUILDINGWOODSHEDROCKROCKROCKROCKOHEOHEOHEOHEOHEBB BBBBBB TBTBTBTBTBTBTBTBTBTBTBTBTB
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1503001500FULL SCALE: 1"= 2" = FULL SCALE1" = HALF SCALEFILE NAME:S:\@RES GIS\Projects\NC\Little Sebastian\CAD\DWG\675700_SHT_SITE.dwg SAVED BY: Tswartzfager
DRAWING TITLE:
PROJECT NAME:SHEET NUMBER:DESCRIPTIONMARKDATE
REVISIONS:
RELEASED FOR:PLOT DATE:PROJECT NUMBER:PROJECT MANAGER:DESIGNED:DRAWN:CHECKED:SEAL302 Jefferson Street, Suite 110Raleigh, NC 27605Main: 919.829.9909Fax: [phone]www.res.usSURRY COUNTY, NORTH CAROLINA
EXISTING CONDITIONS
GIDEON STREAM MITIGATION SITE
BRCTRSAFMBPB0405E2PRELIMINARY - NOT FOR CONSTRUCTION 05/24/2019REACH MC2REACH JN4REACH JN5REACH JN6
GRAVEL ROADGRAVEL ROAD12" CPP(NOT IN USE)12" CPP(NOT IN USE)15" CMPBURIED15" CMP1143.37'24" CMPINV. IN = 1172.24'INV. OUT = 1169.72'48" CMPINV. IN = 1151.87'INV. OUT = 1149.72'BB
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LCELCELCELCE LCESCALE: HOR 1"=30'; VERT 1"=6'11401150116011701180114011501160117011800+000+501+001+502+002+503+003+504+004+505+005+506+00S37S38EXISTING GRADEALONG STREAMCENTERLINE(STA 2+13)
(STA 3+01)CONSERVATIONEASEMENTBREAKEXIST. 24 LFOF 48" CMP3060300FULL SCALE: 1"= 2" = FULL SCALE1" = HALF SCALEFILE NAME:S:\@RES GIS\Projects\NC\Little Sebastian\CAD\DWG\675700_SHT_JN4.dwg SAVED BY: Tswartzfager
DRAWING TITLE:
PROJECT NAME:SHEET NUMBER:DESCRIPTIONMARKDATE
REVISIONS:
RELEASED FOR:PLOT DATE:PROJECT NUMBER:PROJECT MANAGER:DESIGNED:DRAWN:CHECKED:SEAL302 Jefferson Street, Suite 110Raleigh, NC 27605Main: 919.829.9909Fax: [phone]www.res.us05/28/2019PRELIMINARY - NOT FOR CONSTRUCTIONS140405BPBAFMTRSBRCGIDEON STREAM MITIGATION SITE
REACH JN4
SURRY COUNTY, NORTH CAROLINA REACH JN4ENHANCEMENT IIISTA 0+00 TO 2+13EXISTING CHANNEL CROSSING ANDACCESS ROAD TO REMAINREACH JN4ENHANCEMENT ISTA 3+01 TO 5+50REACH JN5REACH MC2BENCH LEFT BANK ALONGENHANCEMENT REACHPER TYPICAL DETAILSEE SHEET D3REMOVING EXISTINGPIPES & DISPOSEOF OFF SITE
12" CPP(NOT IN USE)12" CPP(NOT IN USE)15" CMPBURIED15" CMP1143.37'BBBBBBBB BBBBBB
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LCESCALE: HOR 1"=30'; VERT 1"=3'11301135114011451150113011351140114511500+000+501+001+502+002+503+00EXISTING GRADEALONG STREAMCENTERLINEPROPOSEDCHANNEL BED3060300FULL SCALE: 1"= 2" = FULL SCALE1" = HALF SCALEFILE NAME:S:\@RES GIS\Projects\NC\Little Sebastian\CAD\DWG\675700_SHT_JN5.dwg SAVED BY: Tswartzfager
DRAWING TITLE:
PROJECT NAME:SHEET NUMBER:DESCRIPTIONMARKDATE
REVISIONS:
RELEASED FOR:PLOT DATE:PROJECT NUMBER:PROJECT MANAGER:DESIGNED:DRAWN:CHECKED:SEAL302 Jefferson Street, Suite 110Raleigh, NC 27605Main: 919.829.9909Fax: [phone]www.res.us05/24/2019PRELIMINARY - NOT FOR CONSTRUCTIONS150405BPBAFMTRSBRCGIDEON STREAM MITIGATION SITE
REACH JN5
SURRY COUNTY, NORTH CAROLINA LAY BACK LEFT BANK, INSTALLCOIR MATTING & LIVE STAKESSTA 0+30 TO 0+70REACH JN4REACH MC2REACH JN5ENHANCEMENT ISTA 0+00 TO 2+44BENCH LEFT BANKPER TYPICAL DETAILSTA 1+19 TO 1+82SEE SHEET D3
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ROAD15" CPPINV. IN = 1186.37'INV. OUT = 1185.72'BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBTBTBTBTBTBTBTBTBTBTBTBTBTBTBTBTBTB TBTBTBTBTBTBTBTBTBTBTBTBTBTBTBTBTBTBTBTBTBTB
TBTBTB
TBTBTBTBXXXLCELCELCELCELCELCELCE LCE LCELCELCELCELCELCELCELCELCELCELCE
LCELCE0+000+501+001+502+002+50
3+003+504+004+505+005+506+006+5015" CPPINV. IN = 1186.37'INV. OUT = 1185.72'BBBBBBBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBBBBBB
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TBTBXXLCELCELCELCELCELCELCELCELCELCELCELCELCELCELCE LCELCELCELCELCELCE5+005+506+006+507+007+508+008+509+009+5010+0010+5011+0011+5012+0012+50S12S133060300FULL SCALE: 1"= 2" = FULL SCALE1" = HALF SCALEFILE NAME:S:\@RES GIS\Projects\NC\Little Sebastian\CAD\DWG\675700_SHT_JN6.dwg SAVED BY: Tswartzfager
DRAWING TITLE:
PROJECT NAME:SHEET NUMBER:DESCRIPTIONMARKDATE
REVISIONS:
RELEASED FOR:PLOT DATE:PROJECT NUMBER:PROJECT MANAGER:DESIGNED:DRAWN:CHECKED:SEAL302 Jefferson Street, Suite 110Raleigh, NC 27605Main: 919.829.9909Fax: [phone]www.res.us05/28/2019PRELIMINARY - NOT FOR CONSTRUCTIONS160405BPBAFMTRSBRCGIDEON STREAM MITIGATION SITE
REACH JN6
SURRY COUNTY, NORTH CAROLINA REACH JN6PRESERVATIONSTA 0+00 TO 5+08REACH JN6ENHANCEMENT IIISTA 5+38 TO 12+45REACH JN6ENHANCEMENT IIISTA 5+38 TO 12+45MATCH LINE 6+00
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GRAVEL ROAD12" CPPINV. IN = 1154.95'INV. OUT = 1154.89'WOODBUILDINGWOODBUILDINGBBBBBBBBBBBBBBBBBBBBBBTBTBTBTBTBTBTBTBTBTBTB
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
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0S12S13S14S15S16S17S18S19S20S21PROP 24 LFOF 30" RCPSCALE: HOR 1"=30'; VERT 1"=3'114511501155116011651145115011551160116512+0012+5013+0013+5014+0014+5015+0015+5016+0016+5017+0017+5018+0018+50S15S12S18S17S19S20S13S14S16-3.00%-1.30%-5.48%-4.10%-3.54%-4.28%PROPOSEDCHANNEL BEDEXISTING GRADEALONG STREAMCENTERLINEPROPOSED TOPOF BANK(STA 13+09)(STA 13+42)CONSERVATIONEASEMENTBREAK
3060300FULL SCALE: 1"= 2" = FULL SCALE1" = HALF SCALEFILE NAME:S:\@RES GIS\Projects\NC\Little Sebastian\CAD\DWG\675700_SHT_JN6.dwg SAVED BY: Tswartzfager
DRAWING TITLE:
PROJECT NAME:SHEET NUMBER:DESCRIPTIONMARKDATE
REVISIONS:
RELEASED FOR:PLOT DATE:PROJECT NUMBER:PROJECT MANAGER:DESIGNED:DRAWN:CHECKED:SEAL302 Jefferson Street, Suite 110Raleigh, NC 27605Main: 919.829.9909Fax: [phone]www.res.us05/28/2019PRELIMINARY - NOT FOR CONSTRUCTIONS170405BPBAFMTRSBRCGIDEON STREAM MITIGATION SITE
REACH JN6
SURRY COUNTY, NORTH CAROLINA REACH JN6RESTORATIONSTA 13+42 TO 20+78TYPICAL RIGHT MEANDER CROSS SECTION℄℄TYPICAL SHALLOW CROSS SECTION℄TYPICAL LEFT MEANDER CROSS SECTION1.5'1.6'6.2'1.0'3.8'1.7'6.7'1.5'1.5'1.7'3.8'6.7'BANKFULL STAGEBANKFULL STAGEBANKFULL STAGEREACH JN6 STA 13+42 TO STA 20+78S16MATCH LINE 12+00
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LCELCELCE18+0018+5019+0019+5020+0020+5021+0021+5022+0022+5023+0023+5024+0024+502
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25+38S20S21S22S23S53SCALE: HOR 1"=30'; VERT 1"=3'113011351140114511501130113511401145115018+5019+0019+5020+0020+5021+0021+5022+0022+5023+0023+5024+0024+5025+00S21S22S23S53PROPOSEDCHANNEL BEDEXISTING GRADEALONG STREAMCENTERLINEPROPOSED TOPOF BANK3060300FULL SCALE: 1"= 2" = FULL SCALE1" = HALF SCALEFILE NAME:S:\@RES GIS\Projects\NC\Little Sebastian\CAD\DWG\675700_SHT_JN6.dwg SAVED BY: Tswartzfager
DRAWING TITLE:
PROJECT NAME:SHEET NUMBER:DESCRIPTIONMARKDATE
REVISIONS:
RELEASED FOR:PLOT DATE:PROJECT NUMBER:PROJECT MANAGER:DESIGNED:DRAWN:CHECKED:SEAL302 Jefferson Street, Suite 110Raleigh, NC 27605Main: 919.829.9909Fax: [phone]www.res.us05/24/2019PRELIMINARY - NOT FOR CONSTRUCTIONS180405BPBAFMTRSBRCGIDEON STREAM MITIGATION SITE
REACH JN6
SURRY COUNTY, NORTH CAROLINA REACH JN6RESTORATIONSTA 13+42 TO 20+78TYPICAL RIGHT MEANDER CROSS SECTION℄℄TYPICAL SHALLOW CROSS SECTION℄TYPICAL LEFT MEANDER CROSS SECTION1.5'1.6'6.2'1.0'3.8'1.7'6.7'1.5'1.5'1.7'3.8'6.7'BANKFULL STAGEBANKFULL STAGEBANKFULL STAGEREACH JN6 STA 13+42 TO STA 20+78REACH MC2S17MATCH LINE 18+50
REACH JN6RESTORATIONSTA 20+78 TO 25+17TIE RESTORATION INTORELIC CHANNEL FEATUREAT STA 20+78BEGIN TRANSITION FROMJN6 TO MILL CREEK ATDROP STRUCTURE
GRAVEL ROADED NIXON ROAD50' RIGHT OF WAY
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TBTBTBTBTBTBTBTBTBTBTBTBTBXXXX XXXXXXXX X X X19+50 20+0020+50 21+00 21+50 22+0022+5023+0023+5024+0024+5025+00
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27+5028+00S19S27S28S29S30S31S28.5S30.5LCE LCELCELCE
LCELCELCELCE
LCELCELCELCELCELCELCELCELCELCELCELCESCALE: HOR 1"=30'; VERT 1"=3'113511401145115011551135114011451150115520+5021+0021+5022+0022+5023+0023+5024+0024+5025+0025+5026+0026+5027+00S28S29S30S31-0.85%-0.85%S28(STA 20+72)(STA 21+23)CONSERVATIONEASEMENTBREAKPROPOSEDCHANNEL BEDEXISTING GRADEALONG STREAMCENTERLINEPROPOSED TOPOF BANK3060300FULL SCALE: 1"= 2" = FULL SCALE1" = HALF SCALEFILE NAME:S:\@RES GIS\Projects\NC\Little Sebastian\CAD\DWG\675700_SHT_MC2.dwg SAVED BY: Tswartzfager
DRAWING TITLE:
PROJECT NAME:SHEET NUMBER:DESCRIPTIONMARKDATE
REVISIONS:
RELEASED FOR:PLOT DATE:PROJECT NUMBER:PROJECT MANAGER:DESIGNED:DRAWN:CHECKED:SEAL302 Jefferson Street, Suite 110Raleigh, NC 27605Main: 919.829.9909Fax: [phone]www.res.us05/24/2019PRELIMINARY - NOT FOR CONSTRUCTIONS190405BPBAFMTRSBRCGIDEON STREAM MITIGATION SITE
REACH MC2
SURRY COUNTY, NORTH CAROLINA REACH MC2RESTORATIONSTA 21+23 TO STA 31+67LITTLE SEBASTIANSTREAM MITIGATION SITETYPICAL RIGHT MEANDER CROSS SECTION℄℄TYPICAL SHALLOW CROSS SECTION℄TYPICAL LEFT MEANDER CROSS SECTION4.2'7.3'23.0'2.6'10.8'7.9'23.0'4.7'4.7'7.9'10.8'23.0'BANKFULL STAGEBANKFULL STAGEBANKFULL STAGEREACH MC2 STA 20+72 TO STA 31+673.1'
MATCH LIN
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2
7
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0
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XXXXXXXXXX26+50 27+00 27+5028+0028+5029+00 29+5030+0030+50
31+0031+5032+0032+5033
+
0
0
3
3
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5
0
3
4
+
0
0
34+
5
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6
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DRAWING TITLE:
PROJECT NAME:SHEET NUMBER:DESCRIPTIONMARKDATE
REVISIONS:
RELEASED FOR:PLOT DATE:PROJECT NUMBER:PROJECT MANAGER:DESIGNED:DRAWN:CHECKED:SEAL302 Jefferson Street, Suite 110Raleigh, NC 27605Main: 919.829.9909Fax: [phone]www.res.us05/24/2019PRELIMINARY - NOT FOR CONSTRUCTIONS200405BPBAFMTRSBRCGIDEON STREAM MITIGATION SITE
REACH MC2
SURRY COUNTY, NORTH CAROLINA REACH MC2RESTORATIONSTA 21+23 TO 31+67S19MATCH LINE 27+00
S21MATCH LINE 34+00TYPICAL RIGHT MEANDER CROSS SECTION℄℄TYPICAL SHALLOW CROSS SECTION℄TYPICAL LEFT MEANDER CROSS SECTION4.2'7.3'23.0'2.6'10.8'7.9'23.0'4.7'4.7'7.9'10.8'23.0'BANKFULL STAGEBANKFULL STAGEBANKFULL STAGEREACH MC2 STA 20+72 TO STA 31+673.1'REACH MC2ENHANCEMENT IIISTA 31+67 TO 35+24
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BBBBBBBBBBXXXXXXX33+0033+5034+0034+5035+0035+5036+0036+5037+0037+503
8
+
0
0
38+5039+0039+5040+0040+5041+00S53LCELCELCELCELCELCELCELCELCELCELCELCELCELCELCE######0FULL SCALE: 1"= 2" = FULL SCALE1" = HALF SCALEFILE NAME:S:\@RES GIS\Projects\NC\Little Sebastian\CAD\DWG\675700_SHT_MC2.dwg SAVED BY: Tswartzfager
DRAWING TITLE:
PROJECT NAME:SHEET NUMBER:DESCRIPTIONMARKDATE
REVISIONS:
RELEASED FOR:PLOT DATE:PROJECT NUMBER:PROJECT MANAGER:DESIGNED:DRAWN:CHECKED:SEAL302 Jefferson Street, Suite 110Raleigh, NC 27605Main: 919.829.9909Fax: [phone]www.res.us05/24/2019PRELIMINARY - NOT FOR CONSTRUCTIONS210405BPBAFMTRSBRCGIDEON STREAM MITIGATION SITE
REACH MC2
SURRY COUNTY, NORTH CAROLINA MC2ENHANCEMENT IIISTA 38+20 TO 40+42LITTLE SEBASTIAN STREAMMITIGATION SITES20MATCH LINE 34+00 MC2ENHANCEMENT IIISTA 31+67 TO 35+23REACH JN6
OHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEWOODBUILDINGWOODSHEDWOODBUILDINGWOODSHEDROCKROCKROCKROCKOHEOHEOHEOHEOHEBB BBBBBB TBTBTBTBTBTBTBTBTBTBTBTBTB
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B
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B
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B
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TB
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LCE LCE
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1503001500FULL SCALE: 1"= 2" = FULL SCALE1" = HALF SCALEFILE NAME:S:\@RES GIS\Projects\NC\Little Sebastian\CAD\DWG\675700_SHT_SITE.dwg SAVED BY: Tswartzfager
DRAWING TITLE:
PROJECT NAME:SHEET NUMBER:DESCRIPTIONMARKDATE
REVISIONS:
RELEASED FOR:PLOT DATE:PROJECT NUMBER:PROJECT MANAGER:DESIGNED:DRAWN:CHECKED:SEAL302 Jefferson Street, Suite 110Raleigh, NC 27605Main: 919.829.9909Fax: [phone]www.res.usSURRY COUNTY, NORTH CAROLINA
FENCING PLAN
GIDEON STREAM MITIGATION SITE
BRCTRSAFMBPB0405F1PRELIMINARY - NOT FOR CONSTRUCTION 05/24/2019REACH MC2REACH JN4REACH JN5REACH JN6FENCING LEGENDLIMITS OF CONSERVATIONEASEMENTLCEEXISTING FENCELINEPROPOSED FENCELINEFENCING NOTES:1.CONTRACTOR TO TIE PROPOSED FENCEINTO EXISTING FENCE WHERE APPLICABLETO MAINTAIN CATTLE EXCLUSION.2.CONTRACTOR SHALL REMOVE ALL FENCINGLOCATED WITHIN LIMITS OF CONSERVATIONEASEMENT.INSTALL 1700 LF OFWOVEN WIRE FENCESEE DETAIL SHT D3INSTALL 4600 LF OFWOVEN WIRE FENCESEE DETAIL SHT D3
OHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEWOODBUILDINGWOODSHEDWOODBUILDINGWOODSHEDROCKROCKROCKROCKOHEOHEOHEOHEOHEBB BBBBBB TBTBTBTBTBTBTBTBTBTBTBTBTB
TBTB
TB
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B TBTB TB
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B
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B
TBTB
TB
TB
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1503001500FULL SCALE: 1"= 2" = FULL SCALE1" = HALF SCALEFILE NAME:S:\@RES GIS\Projects\NC\Little Sebastian\CAD\DWG\675700_SHT_SITE.dwg SAVED BY: Tswartzfager
DRAWING TITLE:
PROJECT NAME:SHEET NUMBER:DESCRIPTIONMARKDATE
REVISIONS:
RELEASED FOR:PLOT DATE:PROJECT NUMBER:PROJECT MANAGER:DESIGNED:DRAWN:CHECKED:SEAL302 Jefferson Street, Suite 110Raleigh, NC 27605Main: 919.829.9909Fax: [phone]www.res.us5/24/2019PRELIMINARY - NOT FOR CONSTRUCTIONP10405BPBAFMTRSBRCGIDEON STREAM MITIGATION SITE
PLANTING PLAN
SURRY COUNTY, NORTH CAROLINAPLANTING NOTESALL PLANTING AREAS1.EROSION CONTROL MEASURES SHALL BE PROPERLY MAINTAINED UNTIL PERMANENT VEGETATIONIS ESTABLISHED AND FINAL APPROVAL HAS BEEN ISSUED. THE CONTRACTOR SHALL INSPECTEROSION CONTROL MEASURES AT THE END OF EACH WORKING DAY TO ENSURE MEASURES AREFUNCTIONING PROPERLY.2.DISTURBED AREAS NOT AT FINAL GRADE SHALL BE TEMPORARILY VEGETATED WITHIN 10WORKING DAYS. UPON COMPLETION OF FINAL GRADING, PERMANENT VEGETATION SHALL BEESTABLISHED FOR ALL DISTURBED AREAS WITHIN 10 WORKING DAYS. SEEDING SHALL BE INACCORDANCE WITH EROSION CONTROL PLAN.3.ALL DISTURBED AREAS SHALL BE PREPARED PRIOR TO PLANTING BY DISC OR SPRING-TOOTHCHISEL PLOW TO MINIMUM DEPTH OF 12 INCHES. MULTIPLE PASSES SHALL BE MADE ACROSSPLANTING AREAS WITH THE IMPLEMENT AND THE FINAL PASS SHALL FOLLOW TOPOGRAPHICCONTOURS.4.BARE ROOT PLANTINGS SHALL BE PLANTED ACCORDING TO DETAIL SHOWN ON SHEET D2. LIVESTAKES SHALL BE PLANTED ACCORDING TO DETAIL SHOWN ON SHEET D2.5.TREATMENT/REMOVAL OF INVASIVE SPECIES, PINES AND SWEET GUMS LESS THAN 6" DBH SHALLBE PERFORMED THROUGHOUT THE PLANTED AREA.6.SPECIES SHALL BE DISTRIBUTED SUCH THAT 3 TO 6 PLANTS OF THE SAME SPECIES AREGROUPED TOGETHER.7.BARE ROOT PLANTING DENSITY IS APPROXIMATELY 800 STEMS PER ACRE (IN SUPPLEMENTALPLANTING AREAS 400 STEMS PER ACRE).8.LIVE STAKES ARE PROPOSED ALONG THE OUTSIDE OF MEANDER BENDS AND ALONG BOTHBANKS OF STRAIGHT REACHES ADJACENT TO POOLS.9.TEMPORARY SEED MIX SHALL BE APPLIED AT A RATE OF 150 LBS/ACRE TO ALL DISTURBED AREASWITH SLOPES EQUAL TO OR STEEPER THAN 3:1.10.PERMANENT RIPARIAN SEED MIX SHALL BE APPLIED TO ALL DISTURBED AREAS WITHIN THECONSERVATION EASEMENT AT A RATE OF 15 LBS/ACRE.11.PERMANENT HERB SEED MIX SHALL BE APPLIED TO ALL DISTURBED AREAS WITHIN THECONSERVATION EASEMENT BREAKS AT A RATE OF 15 LBS/ACRE. PLANTING LEGENDLive Staking and Live Cuttings Bundle Tree SpeciesCommon NameScientific NamePercentCompositionSilky dogwoodCornus amomum40%Black willowSalix nigra60%PLANTING TABLEPermanent Riparian Seed MixCommon NameScientific NamePercentCompositionVirginia WildryeElymus virginicus25%Indian GrassSorghastrum nutans25%Little Blue StemSchi]achyrium scoparium10%Soft RushJuncus effusus10%Blackeyed susanRudbeckia hirta10%DeertongueDichanthelium clandestinum10%Common MilkweedAsclepias syriaca5%Showy GoldenrodSolidago erecta5%LIMITS OF CONSERVATIONEASEMENTLCEREACH JN6REACH JN5REACH JN4REACH MC2Bare Root Planting Tree SpeciesCommon NameScientific NamePercentCompositionWater OakQuercus nigra15%Willow OakQuercus phellos15%River BirchBetula nigra15%American SycamorePlatanas occidentalis10%Northern Red OakQuercus rubra10%Green AshFraxinus pennsylvanica10%Yellow PoplarLiriodendron tulipifera10%PersimmonDiospyros virginiana5%ElderberrySambucus canadensis5%Black GumNyssa biflora5%EXISTING TREELINERIPARIAN PLANTING(TOTAL AREA: 4.3 AC)
WHEN AND WHERE TO USE ITSILT FENCE IS APPLICABLE IN AREAS:WHERE THE MAXIMUM SHEET OR OVERLAND FLOW PATH LENGTH TO THE FENCE IS 100-FEET.WHERE THE MAXIMUM SLOPE STEEPNESS (NORMAL [PERPENDICULAR] TO FENCE LINE) IS 2H:1V.THAT DO NOT RECEIVE CONCENTRATED FLOWS GREATER THAN 0.5 CFS.DO NOT PLACE SILT FENCE ACROSS CHANNELS OR USE IT AS A VELOCITY CONTROL BMP.CONSTRUCTION SPECIFICATIONS:1.USE A SYNTHETIC FILTER FABRIC OF AT LEAST 95% BY WEIGHT OF POLYOLEFINS OR POLYESTER, WHICH ISCERTIFIED BY THE MANUFACTURER OR SUPPLIER AS CONFORMING TO THE REQUIREMENTS IN ASTM D 6461.SYNTHETIC FILTER FABRIC SHOULD CONTAIN ULTRAVIOLET RAY INHIBITORS AND STABILIZERS TO PROVIDE AMINIMUM OF 6 MONTHS OF EXPECTED USABLE CONSTRUCTION LIFE AT A TEMPERATURE RANGE OF 0° TO 120°F.2.ENSURE THAT POSTS FOR SEDIMENT FENCES ARE 1.33 LB/LINEAR FT STEEL WITH A MINIMUM LENGTH OF 5 FEET.MAKE SURE THAT STEEL POSTS HAVE PROJECTIONS TO FACILITATE FASTENING THE FABRIC.CONSTRUCTION:1.CONSTRUCT THE SEDIMENT BARRIER OF EXTRA STRENGTH SYNTHETIC FILTER FABRICS.2.ENSURE THAT THE HEIGHT OF THE SEDIMENT FENCE DOES NOT EXCEED 24 INCHES ABOVE THE GROUNDSURFACE. (HIGHER FENCES MAY IMPOUND VOLUMES OF WATER SUFFICIENT TO CAUSE FAILURE OF THESTRUCTURE.)3.CONSTRUCT THE FILTER FABRIC FROM A CONTINUOUS ROLL CUT TO THE LENGTH OF THE BARRIER TO AVOIDJOINTS. WHEN JOINTS ARE NECESSARY, SECURELY FASTEN THE FILTER CLOTH ONLY AT A SUPPORT POST WITH 4FEET MINIMUM OVERLAP TO THE NEXT POST.4.EXTRA STRENGTH FILTER FABRIC WITH 6 FEET POST SPACING DOES NOT REQUIRE WIRE MESH SUPPORT FENCE.SECURELY FASTEN THE FILTER FABRIC DIRECTLY TO POSTS. WIRE OR PLASTIC ZIP TIES SHOULD HAVE MINIMUM50 POUND TENSILE STRENGTH.5.EXCAVATE A TRENCH APPROXIMATELY 4 INCHES WIDE AND 8 INCHES DEEP ALONG THE PROPOSED LINE OFPOSTS AND UPSLOPE FROM THE BARRIER.6.PLACE 12 INCHES OF THE FABRIC ALONG THE BOTTOM AND SIDE OF THE TRENCH.7.BACKFILL THE TRENCH WITH SOIL PLACED OVER THE FILTER FABRIC AND COMPACT. THOROUGH COMPACTIONOF THE BACKFILL IS CRITICAL TO SILT FENCE PERFORMANCE.8.DO NOT ATTACH FILTER FABRIC TO EXISTING TREES.MAINTENANCE:INSPECT SEDIMENT FENCES AT LEAST ONCE A WEEK AND AFTER EACH RAINFALL. MAKE ANY REQUIRED REPAIRSIMMEDIATELY.SHOULD THE FABRIC OF A SEDIMENT FENCE COLLAPSE, TEAR, DECOMPOSE OR BECOME INEFFECTIVE, REPLACE ITPROMPTLY.REMOVE SEDIMENT DEPOSITS AS NECESSARY TO PROVIDE ADEQUATE STORAGE VOLUME FOR THE NEXT RAIN AND TOREDUCE PRESSURE ON THE FENCE. TAKE CARE TO AVOID UNDERMINING THE FENCE DURING CLEANOUT.REMOVE ALL FENCING MATERIALS AND UNSTABLE SEDIMENT DEPOSITS AND BRING THE AREA TO GRADE AND STABILIZEIT AFTER THE CONTRIBUTING DRAINAGE AREA HAS BEEN PROPERLY STABILIZED.8"4"24" MIN
24" MIN
8"RUNOFFRUNOFF18" TO 24"FLAT-BOTTOM TRENCH DETAILV-SHAPED TRENCH DETAILSILT FENCE INSTALLATION18" TO 24"TEMPORARY SILT FENCENTSSEE S
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LAN EXIST
ING
ROAD50' MIN.VARIES COARSE AGGREGATE -STONE SIZE = 2"-3"PURPOSE:STABILIZED CONSTRUCTION ENTRANCES SHOULD BE USED AT ALL POINTS WHERE TRAFFIC WILL BE LEAVING ACONSTRUCTION SITE AND MOVING DIRECTLY ONTO A PUBLIC ROAD.CONSTRUCTION SPECIFICATIONS:1.CLEAR THE ENTRANCE AND EXIT AREA OF ALL VEGETATION, ROOTS, AND OTHER OBJECTIONABLE MATERIAL ANDPROPERLY GRADE IT.2.PLACE THE GRAVEL TO THE SPECIFIC GRADE AND DIMENSIONS SHOWN ON THE DETAIL, AND SMOOTH IT.3.PROVIDE DRAINAGE TO CARRY WATER TO A SEDIMENT TRAP OR OTHER SUITABLE OUTLET.4.USE GEOTEXTILE FABRICS BECAUSE THEY IMPROVE STABILITY OF THE FOUNDATION IN LOCATIONS SUBJECT TOSEEPAGE OR HIGH WATER TABLE.MAINTENANCE:MAINTAIN THE GRAVEL PAD IN A CONDITION TO PREVENT MUD OR SEDIMENT FROM LEAVING THE CONSTRUCTION SITE.THIS MAY REQUIRE PERIODIC TOP DRESSING WITH 2-INCH STONE. AFTER EACH RAINFALL, INSPECT ANY STRUCTUREUSED TO TRAP SEDIMENT AND CLEAN IT OUT AS NECESSARY. IMMEDIATELY REMOVE ALL OBJECTIONABLE MATERIALSSPILLED, WASHED, OR TRACKED ONTO PUBLIC ROADWAYS, OR AIRFIELD PAVEMENTS.TEMPORARY GRAVEL CONSTRUCTION ENTRANCENTSNOTE: HOSE SHOULD BEKEPT OUTSIDE OF WORKAREANOTES:1.EXCAVATION SHALL BE PERFORMED ONLY IN DRY AND/OR ISOLATED SECTIONS OFCHANNEL.2.IMPERVIOUS DIKES SHOULD BE USED TO ISOLATE WORK AREAS FROM STREAMFLOW.3.THE CONTRACTOR SHALL NOT DISTURB MORE AREA THAN CAN BE STABILIZED INONE WORKING DAY. A MAXIMUM OF 200 FEET MAY BE DISTURBED AT ANY ONETIME.4.THE CONTRACTOR SHALL BE RESPONSIBLE FOR DETERMINING PUMP SIZESUFFICIENT TO PUMP BASE FLOW.5.DIKE MUST BE CONSTRUCTED OF NON-ERODIBLE MATERIALS SUCH AS SANDBAGS.SEQUENCE OF CONSTRUCTION:1.INSTALL STILLING BASIN AND STABILIZED OUTFALL USING CLASS A RIP RAP AT THEDOWNSTREAM END OF THE DESIGNATED PROJECT WORKING AREA.2.THE CONTRACTOR SHALL INSTALL THE PUMP AROUND PUMP AND THE TEMPORARYPIPING THAT WILL CONVEY THE BASE FLOW FROM UPSTREAM OF THE WORK AREATO THE STABILIZED OUTFALL.3.INSTALL UPSTREAM IMPERVIOUS DIKE AND BEGIN PUMPING OPERATIONS FORSTREAM DIVERSION.4.INSTALL THE DOWNSTREAM IMPERVIOUS DIKE AND DEWATERING PUMPINGAPPARATUS IF NEEDED TO DEWATER THE ENTRAPPED AREA. THE PUMP AND HOSEFOR THIS PURPOSE SHALL BE OF SUFFICIENT SIZE TO DEWATER THE WORK AREA.THIS WATER WILL ALSO BE PUMPED TO AN OUTFALL STABILIZED WITH CLASS A RIPRAP.5.THE CONTRACTOR SHALL EXCAVATE ANY ACCUMULATED SILT AND DEWATER BEFOREREMOVAL OF THE IMPERVIOUS DIKE. WHEN DEWATERING AREA, ALL DIRTY WATERMUST BE PUMPED THROUGH A SILT BAG. REMOVE IMPERVIOUS DIKES, PUMPS,AND TEMPORARY FLEXIBLE HOSE/PIPING STARTING WITH THE DOWNSTREAM DIKEFIRST.6.ONCE THE WORKING AREA IS COMPLETED, REMOVE ALL RIP RAP AND IMPERVIOUSDIKES AND STABILIZE DISTURBED AREAS WITH SEED AND MULCH.7.ALL WORK IN CHANNEL MUST BE COMPLETED BEFORE REMOVING IMPERVIOUS DIKE.SILT BAG PROFILE15' TO 20'FLOWINTAKE HOSEPUMP AROUNDPUMPCLASS ASTONEWORKAREADE-WATERINGPUMPIMPERVIOUSDIKESILT BAGLOCATIONSTABILIZED OUTFALLCLASS A STONEFILTER FABRICEXISTINGGROUNDDISCHARGEHOSE8" OF CLASS ASTONEFILTER FABRICSTABILIZEDOUTFALL CLASS ASTONEEXISTINGCHANNELDISCHARGE HOSEIMPERVIOUS DIKECLASS ASTONEPUMP AROUND & DEWATERING DETAILNTSSECTION B-BFLOWSECTION A-APLANFLOWCLASS I AND II RIPRAPSPILLWAY CREST1' MIN OF # 5WASHED STONECLASS I AND IIRIP RAPFILTER FABRICGENERAL NOTES:1.CONSTRUCT DAM ACCORDING TO NCDENR EROSION CONTROLMANUAL.2.ROCK DAM RIPRAP SHALL BE 50/50 MIX OF CLASS I AND II.3.PLACE ROCK DAM AS SHOWN ON PLANS. EXTEND CLASS B RIPRAP ROCK APRON 5 FEET DOWNSTREAM FROM TOE OF ROCKDAM.1.5' THICK CLASSB ROCK APRON1.5' THICK CLASSB ROCK APRONCUTOFF TRENCHFILTERFABRIC# 5 WASHED STONETEMPORARY ROCK CHECK DAMNTSFLOWSECTION A-ANOTE: END OF DIKE AT GROUND LEVEL TO BEHIGHER THAN THE LOWEST POINT OF FLOW CHECK.SUFFICIENT SANDBAGS ARE TO BE PLACED TOPREVENT SCOURING.SECTION B-BBBAAPLAN VIEWSANDBAG BARRIERS SHALL BE CONSTRUCTED OF THREE LAYERS OF SANDBAGS.THE BOTTOM LAYER SHALL CONSIST OF 3 ROWS OF BAGS, THE MIDDLE LAYERSHALL CONSIST OF 2 ROWS OF BAGS AND THE TOP LAYER SHALL CONSIST OF 1ROW OF BAGS. THE RECOMMENDED DIMENSION OF A FILLED SANDBAG SHALL BEAPPROXIMATELY 0.5 FT X 0.5 FT X 1.5 FT.SANDBAG IMPERVIOUS DIKENTSEROSION CONTROL WATTLENTSEXISTINGGRADEMINIMUM 9" EROSIONCONTROL STRAW WATTLEOR COIR WATTLE/LOGNOTE:EROSION CONTROL WATTLES OR COIR LOGS/WATTLES MAY BE USED IN PLACE OFSILT FENCE.SLOPEINSTALL WATTLE IN 3" TO5" TRENCH2" x 1" OR 2" x 2"WOODEN STAKEBACKFILL TRENCH WITHCOMPACTED EARTH1.25 LB./LINEAR FT. STEEL POSTSEXTRA STRENGTHFILTER FABRICUSE EITHER FLAT-BOTTOMOR V-BOTTOM TRENCHSHOWN BELOWBURY FABRICHEAVY DUTY PLASTIC TIEFOR STEEL POSTS6' MAX WITH STANDARD FABRICFILTER FABRICCOMPACTEDEARTHFILTER FABRICFILTER FABRICCOMPACTEDEARTHRUNOFFFILTERFABRICBBAA3:
1
2:12'5' MIN.W (SPILLWAY)MIN. 23 STREAM WIDTH6" MIN.MIDDLE LAYERBOTTOM LAYERTOP LAYEREARTH SURFACETRENCH 0.25' DEEPONLY WHENPLACED ON EARTHSURFACEENDS OF BAGS INADJACENT ROWSBUTTED SLIGHTLYTOGETHERSEE NOTELOWEST POINTGROUND LEVELEARTH SURFACE2'2' MIN. BELOWLOWEST BANKLEVELSCALE: AS SHOWNFILE NAME:S:\@RES GIS\Projects\NC\Little Sebastian\CAD\DWG\675700_SHT_DETAILS.dwg SAVED BY: Tswartzfager
DRAWING TITLE:
PROJECT NAME:SHEET NUMBER:DESCRIPTIONMARKDATE
REVISIONS:
RELEASED FOR:PLOT DATE:PROJECT NUMBER:PROJECT MANAGER:DESIGNED:DRAWN:CHECKED:SEAL302 Jefferson Street, Suite 110Raleigh, NC 27605Main: 919.829.9909Fax: [phone]www.res.us5/24/2019PRELIMINARY - NOT FOR CONSTRUCTIOND10405BPBAFMTRSBRCGIDEON STREAM MITIGATION SITE
DETAILS
SURRY COUNTY, NORTH CAROLINACOIR MATTINGNTSINSTALLATION NOTES:SITE PREPARATION1.GRADE AND COMPACT AREA.2.REMOVE ALL ROCKS, CLODS, VEGETATION, AND OBSTRUCTIONS SO THAT MATTING WILLHAVE DIRECT CONTACT WITH THE SOIL.3.PREPARE SEEDBED BY LOOSENING 3 TO 4 INCHES OF TOPSOIL ABOVE FINAL GRADE.4.TEST SOILS FOR ANY NUTRIENT DEFICIENCIES AND SUBMIT SOIL TEST RESULTS TO THEENGINEER. APPLY ANY TREATMENT SUCH AS LIME OR FERTILIZERS TO THE SOIL IF NEEDED.SEEDING1.SEE PLANTING SHEETS FOR SEEDING REQUIREMENTS.2.APPLY SEED TO SOIL BEFORE PLACING MATTING.INSTALLATION - STREAM BANK1.SEE GRADING NOTES ON PLAN AND PROFILE SHEETS AND DETAIL SHEETS FORINFORMATION REGARDING WHAT AREAS ARE TO RECEIVE COIR MATTING.2.OVERLAP ADJACENT MATS 3" (IN DIRECTION PARALLEL TO FLOW) AND ANCHOR EVERY 12"ACROSS THE OVERLAP. THE UPSTREAM MAT SHOULD BE PLACED OVER THE DOWNSTREAMMAT.3.EDGES SHOULD BE SHINGLED AWAY FROM THE FLOW OF WATER.4.LAY MAT LOOSE TO ALLOW CONTACT WITH SOIL. DO NOT STRETCH TIGHT.5.ANCHOR MAT USING BIODEGRADABLE STAKES OR PINS.6.CUT 8" x 8" TRENCH ALONG TOP OF BANK FOR MAT TERMINATION AS SHOWN IN FIGURES 1& 2. EXTEND MAT 2 TO 3 FEET PAST TOP OF BANK.7.PLACE ADJACENT ROLLS IN THE ANCHOR TRENCH WITH A MINIMUM OF 4" OVERLAP.SECURE WITH BIODEGRADABLE STAKES OR PINES, BACKFILL ANCHOR TRENCH, ANDCOMPACT SOIL.8.STAPLE AT 12" INTERVALS ALONG OVERLAP.9.STREAM BANK MATTING TO BE INSTALLED FROM TOE OF BANK TO A MINIMUM OF 2.0'PAST TOP OF BANK. SEE FIGURE 3 FOR TERMINATION AT TOP OF BANK.10.IF MORE THAN ROLL IS REQUIRED TO COVER THE CHANNEL FROM THE TOP OF BANK DOWNTO THE TOE, THEN OVERLAP MATTING BY A MINIMUM OF 1'.EROSION CONTROL MATTING MUST MEET OR EXCEED THEFOLLOWING REQUIREMENTS:·100 % COCONUT FIBER (COIR) TWINE WOVEN INTO AHIGH STRENGTH MATRIX.·THICKNESS - 0.35 IN. MINIMUM.·SHEAR STRESS – 5 LBS/SQFT·FLOW VELOCITY- OBSERVED 16 FT/SEC·WEIGHT - 29 OZ/SY·OPEN AREA - 38%·SLOPES – UP TO A MAXIMUM OF 1:1FLOW18"FLOWSTEP 1STEP 2FLOWSTEP 1STEP 2FLOW1 ROW OFBIODEGRADABLESTAPLES OR STAKES,MIN. OF 24" O.C1 ROW OFBIODEGRADABLESTAPLES OR STAKES,MIN. OF 24" O.C1 ROW OFBIODEGRADABLESTAPLES OR STAKES,MIN. OF 24" O.CFIGURE 1FIGURE 2SOIL PILEFROM TRENCHTRENCH APPROX.8" WIDE X 8" DEEP1 ROW OFBIODEGRADABLESTAPLES OR STAKES,MIN. OF 24" O.CTRENCH APPROX.8" WIDE x 8" DEEPSOIL PILEFROM TRENCHSOIL FILLEDFROM SOIL PILE,COMPACT WITH FOOTSOIL FILLEDFROM SOIL PILE,COMPACT WITH FOOT1
.
0
'MI
N
.KEY-IN MATTING PERFIG. 1 OR FIG. 2STAKE MATTING JUSTABOVE CHANNEL TOEAND BACKFILL W/RIFFLE MATERIAL2.0'MIN.6" RIFFLEMATERIAL
NOTES:1.LOGS SHOULD BE AT LEAST 12 INCHES IN DIAMETER, 6-9 FEET LONG, RELATIVELY STRAIGHT, ANDHARDWOOD.2.CABLE ANCHORS SHOULD BE PLACED 1' TO 3' FROM EACH END OF LOG. REBAR (5/8" MINIMUM DIAMETER3' MIN. LENGTH TYPICAL) MAY BE USED AS A SUBSTITUTION FOR CABLE ANCHORS PER DIRECTION OFENGINEER.3.IF REBAR IS USED, PRE-DRILL HOLES WITH 5/8" DRILL BIT.FINISHED GRADE30'FLOWTYPICAL SECTIONLOG TOE PROTECTIONNTSCHANNEL PLUGNTSNOTES1.INSTALL STAKES ON 3' CENTERS ON EACH SIDE OF ROLL. TOP OF STAKE SHOULDNOT EXTEND ABOVE ROLL.2.EXCAVATE A SMALL TRENCH (DEPTH APPROX 1/2 TO 2/3 OF LOG DIAM) FORPLACEMENT OF ROLL.3.COIR LOGS SHALL BE 10 FT LONG AND HAVE A DIAMETER OF 12 IN.COIR LOG (TOE PROTECTION)NTSWOODSTAKESNOTE:1.ACCEPTABLE SPECIES INCLUDE BLACK WILLOW (SALIX NIGRA), SILKY WILLOW(SALIX SERICEA) AND SILKY DOGWOOD (CORNUS AMMOMUM).2.LIVE STAKES SHALL BE PLANTED IN AN AREA EXTENDING 3 FEET OUT FROM TOPOF BANK TO JUST BELOW BANKFULL.3.LIVE STAKES SHALL BE SPACED 3 FEET APART, ALTERNATE SPACING.41DETAILLIVE STAKES SHOULD BE LONG ENOUGHTO REACH BELOW THE GROUNDWATERTABLE. (GENERALLY, A LENGTH OF 2 TO 3FEET IS SUFFICIENT.) ADDITIONALLY, THESTAKES SHOULD HAVE A DIAMETER INTHE RANGE OF 0.75 TO 2 INCHES.WATER TABLELIVE STAKENTSDIBBLE PLANTING METHODUSING THE KBC PLANTING BAR1. INSERTPLANTING BAR ASSHOWN AND PULLHANDLE TOWARDPLANTER.4. PULL HANDLE OFBAR TOWARDPLANTER, FIRMINGSOIL AT BOTTOM.2. REMOVEPLANTING BARAND PLACESEEDING ATCORRECT DEPTH.3. INSERTPLANTING BAR 2INCHES TOWARDPLANTER FROMSEEDING.5. PUSHHANDLEFORWARDFIRMING SOILAT TOP.6. LEAVECOMPACTIONHOLE OPEN.WATERTHOROUGHLY.PLANTING NOTES:PLANTING BAGDURING PLANTING, SEEDLINGS SHALLBE KEPT IN A MOIST CANVAS BAG ORSIMILAR CONTAINER TO PREVENT THEROOT SYSTEMS FROM DRYING.KBC PLANTING BARPLANTING BAR SHALL HAVE A BLADEWITH A TRIANGULAR CROSS SECTION,AND SHALL BE 12 INCHES LONG, 4INCHES WIDE AND 1 INCH THICK ATCENTER.ROOT PRUNINGALL SEEDLINGS SHALL BE ROOTPRUNED, IF NECESSARY, SO THAT NOROOTS EXTEND MORE THAN 10INCHES BELOW THE ROOT COLLAR.NOTES:BARE ROOTS SHALL BE PLANTED 6FT. TO 10 FT. ON CENTER,RANDOM SPACING, AVERAGING 8FT. ON CENTER, APPROXIMATELY680 PLANTS PER ACRE.BARE ROOT PLANTINGNTSMAX. 75'EXISTINGCHANNELMIN. 25'FILL TO TOP OFBANKFILL AT LEAST70% OF CHANNELMAX. 75'MIN. 25'NOTES:1.FILL EXISTING CHANNEL TO BANKFULL ELEVATION WHEN POSSIBLE.2.CHANNEL MUST BE FILLED IN 12" TO 18" LIFTS,3.IF CHANNEL CANNOT BE COMPLETELY FILLED TO TOP OF BANK, FILL TO TOP OFBANK FOR 25' OUT OF EVERY 100' SEGMENT.CHANNEL BACKFILLNTSOLD CHANNEL TO BEDIVERTED ORABANDONEDNEW CHANNEL TO BECONSTRUCTEDCOMPACTED BACKFILL(12" LIFTS)IMPERVIOUS SELECT MATERIAL(PER DIRECTION OF ENGINEER)10' MINUNCOMPACTED BACKFILL1.5' MINIMUM1111BANKFULL ELEVATION1/4 TO 1/3 OF LOGDIAMETER CAN BE EXPOSEDPRIOR TO FINAL GRADINGPROPOSED BEDMINIMUM OF 2/3 OF LOGDIAMETER BEDDED BELOWEXISTING CHANNEL INVERT12" MINIMUM LOG DIAMETER (TYP.)INSTALL CABLE ANCHOR AS SHOWN. DRILL (ORSAW CUT) PILOT HOLE THROUGH LOG 1/3 TO1/4 OF THE WAY DOWN SO THAT ANCHORCABLE IS NOT EXPOSED.BANKFULL ELEVATION1/4 TO 1/3 OF LOGDIAMETER CAN BE EXPOSEDPRIOR TO FINAL GRADINGPROPOSED BEDMINIMUM OF 1/2 TO 2/3 OFLOG DIAMETER BEDDEDBELOW CHANNEL INVERT12" LOG DIAMETER (TYP.)CHANNEL PLUG30' MIN.BANKFULL ELEVATIONNEW CHANNEL BANK SHALLBE TREATED AS SPECIFIEDIN PLANSPROPOSEDCHANNEL INVERTLOG TOE OR COIR LOGEXISTINGCHANNELBOTTOMTOP OF BANKCOMPACTED BACKFILL(12" TO 18" LIFTS)COIR FIBERMATTINGFLAT TOP ENDLATERAL BUDSIDE BRANCHREMOVED ATSLIGHT ANGLE45 DEGREETAPERED BUTTEND0.5' TO 1.5'18" MIN.0.75" TO 2"3' MIN.COIR FIBERMATTING2"PLAN VIEWSCALE: AS SHOWNFILE NAME:S:\@RES GIS\Projects\NC\Little Sebastian\CAD\DWG\675700_SHT_DETAILS.dwg SAVED BY: Tswartzfager
DRAWING TITLE:
PROJECT NAME:SHEET NUMBER:DESCRIPTIONMARKDATE
REVISIONS:
RELEASED FOR:PLOT DATE:PROJECT NUMBER:PROJECT MANAGER:DESIGNED:DRAWN:CHECKED:SEAL302 Jefferson Street, Suite 110Raleigh, NC 27605Main: 919.829.9909Fax: [phone]www.res.us5/24/2019PRELIMINARY - NOT FOR CONSTRUCTIOND20405BPBAFMTRSBRCGIDEON STREAM MITIGATION SITE
DETAILS
SURRY COUNTY, NORTH CAROLINA XBCATZWZOUTLET ELEV: EPOOL ELEV: DPLAN VIEW6" #57 STONE ONGEOTEXTILE FABRICEVEN MIX OF NCDOT CLASS 1AND CLASS 2 RIPRAP 30" DEEPUNDISTURBED SOILSECTION A-A' YTYPICAL DRY DISSIPATER BASINNTSNOTE:BASINS WILL BE SIZED BASED ONCONTRIBUTING DRAINAGE AREATO THE EXTENT PRACTICABLE.AA'FLOW
LOG VANENTSFOOTER LOGLEFT OR RIGHT VANE ARM BANK INTERCEPTCONTROL POINTBALLAST BOULDEROR DUCKBILL ANCHORSPOOLHEADER LOGBANKFULLVARIES
0' TO 0.8'3% TO 6%BANKFULLHEADER LOGFOOTER LOGSTREAM BEDIN POOLVARIES0' TO 12 WIDTHFLOWSTREAM BANKTOE OF BANKBALLAST BOULDEROR DUCK BILL ANCHORSFLOWLOG VANENON-WOVEN GEOTEXTILEFABRIC (NCDOT TYPE II)STREAM BANKTOE OF BANKBANKFULL1/2 WIDTHFLOWCOARSE AGGREGATEBACKFILL (1" TO 5")COARSE AGGREGATEBACKFILL (1" TO 5")MIN 4.0'LEFT OR RIGHT VANEARM BANK INTERCEPTCONTROL POINT1.LOG VANES SHALL BE CONSTRUCTED OF ONE OR MORE LOGS HELD IN PLACE BY EITHER BALLAST BOULDERS, DUCKBILLANCHORS, OR REBAR. LOGS SHALL BE A MIN. LENGTH OF 30' AND DIAMETER OF 12" AND BE RELATIVELY STRAIGHT HARDWOOD,RECENTLY HARVESTED. THE LENGTH SHALL BE SUCH THAT THE LOG IS BURIED INTO THE SOIL OF THE STREAM BANK (ON ONEEND) AND STREAM BED (ON THE OTHER END) A MINIMUM DISTANCE OF 4.0'. FLAT-SIDED BALLAST BOULDERS SHALL BE OF SIZE2' X 2' X 1.5' OR AS SPECIFIED BY THE DESIGNER.2.THE VANE SHALL INTERCEPT THE STREAM BANK AT A HEIGHT EQUAL TO BETWEEN ½ BANKFULL STAGE AND BANKFULL STAGE. ANELEVATION CONTROL POINT MAY BE ESTABLISHED AT THE LEFT OR RIGHT STREAM BANK/VANE INTERCEPT POINT. THE VANEINTERCEPT LOCATION MAY BE OTHERWISE DESCRIBED BY ITS RELATIONSHIP TO BANKFULL STAGE OR BY THE LENGTH AND SLOPEOF THE VANE ARM. BANKFULL IS NOT NECESSARILY THE TOP OF THE STREAM BANK SLOPE.3.FILTER FABRIC SHALL BE USED TO SEAL THE GAPS BETWEEN THE LOGS AND UNDER THE COARSE BACKFILL MATERIAL OF THEVANE. THERE SHALL BE NO FILTER FABRIC VISIBLE IN THE FINISHED WORK; EDGES SHALL BE FOLDED TUCKED, OR TRIMMED ASNEEDED.4.LOG VANES SHALL BE BUILT TYPICALLY AS FOLLOWS:A.OVER-EXCAVATE STREAM BED TO A DEPTH EQUAL TO THE TOTAL THICKNESS OF THE HEADER (AND FOOTER IF SPECIFIED)LOGS.B.PLACE FOOTER LOG OF THE VANE ARM IF SPECIFIED. THE SLOPE OF THE VANE ARM IS MEASURED ALONG THE VANE ARMWHICH IS INSTALLED AT AN ANGLE TO THE STREAM BANK AND PROFILE.C.INSTALL HEADER LOG OF THE VANE ARM ON TOP OF AND SLIGHTLY FORWARD OR BACK FROM THE FOOTER LOG.D.NAIL FILTER FABRIC TO THE HEADER LOG USING A GALVANIZED NAIL WITH A PLASTIC CAP. THE SIZE AND GAGE OF NAILAND NAIL SPACING SHALL BE SPECIFIED BY THE DESIGNER.E.PLACE BALLAST BOULDERS OR DUCKBILL ANCHOR ON THE VANE.F.PLACE COARSE BACKFILL BEHIND LOGS ENSURING THAT ANY VOIDS BETWEEN THE LOGS ARE FILLED.G.BACKFILL REMAINDER OF VANE WITH PREVIOUSLY EXCAVATED MATERIAL.5.IF ANY EROSION CONTROL MATTING IS SPECIFIED FOR USE IN THE VICINITY OF THE STREAM BANK/VANE INTERCEPT POINT THEMATTING EDGES SHALL BE NEATLY SECURED AROUND THE LOGS.SECTION A-A PLAN VIEWPROFILE VIEW20° TO 30°NOTES:1.TREES NOT INDICATED TO BE REMOVED SHALL BEPROTECTED DURING CONSTRUCTION INACCORDANCE WITH PLANS.2.SEED AND MULCH ALL BANKS PRIOR TO INSTALLINGCOIR MATTING.INSTALL COIR MATTING PER DETAILSEE DETAIL D1EXCAVATE / GRADE UPPER BANKINSTALL LIVE STAKES (SEE PLANTING PLAN)EXISTING CHANNEL BANKTIE TO EXISTING GRADEMIN SLOPE 2.5H:1VEXISTINGCHANNEL BEDTYPICAL BANK GRADINGNTSVARIES(DESIGNER TO MARK IN FIELDPRIOR TO CONSTRUCTION)10' TO 15'BENCHNON-WOVEN GEOTEXTILEFABRIC (NCDOT TYPE II)3' MAXIMUMBANK HEIGHTSTREAM CHANNELSURFACE FLOWDIVERSIONNOTES:1.CONSTRUCT STREAM CROSSING WHEN FLOW IS LOW.2.HAVE ALL NECESSARY MATERIALS AND EQUIPMENT ON-SITE BEFORE WORK BEGINS.3.MINIMIZE CLEARING AND EXCAVATION OF STREAMBANKS. DO NOT EXCAVATECHANNEL BOTTOM. COMPLETE ONE SIDE BEFORE STARTING ON THE OTHER SIDE.4.INSTALL STREAM CROSSING PERPENDICULAR TO FLOW.5.GRADE SLOPES TO A MINIMUM OF 2:1 SLOPE, MAXIMUM6.MAINTAIN CROSSING SO THAT RUNOFF IN THE CONSTRUCTION ROAD DOES NOTENTER EXISTING CHANNEL.7.A STABILIZED PAD OF NATURAL CLASS A STONE, 6 TO 9 INCHES THICK, LINED WITHFILTER FABRIC SHALL BE USED OVER THE BERM AND ACCESS SLOPES.8.FILTER FABRIC USED SHALL BE NCDOT TYPE 2 ENGINEERING FABRIC OR EQUIVALENT.9.WIDTH OF THE CROSSING SHALL BE SUFFICIENT (8' MIN.) TO ACCOMMODATE THELARGEST VEHICLE CROSSING THE CHANNEL.10.CONTRACTOR SHALL DETERMINE AN APPROPRIATE RAMP ANGLE ACCORDING TOEQUIPMENT UTILIZED.11.TEMPORARY CROSSINGS ARE TO BE ABANDONED IN PLACE.CLASS A STONE OVERFILTER FABRICSTONE APPROACHSECTION: 2:1 MIN., 5:1MAX. SLOPE ON ROADSURFACE FLOWDIVERSIONFORD CROSSINGNTSCLASS A STONEEXISTING STREAMBANKFILTER FABRICAASCALE: AS SHOWNFILE NAME:S:\@RES GIS\Projects\NC\Little Sebastian\CAD\DWG\675700_SHT_DETAILS.dwg SAVED BY: Tswartzfager
DRAWING TITLE:
PROJECT NAME:SHEET NUMBER:DESCRIPTIONMARKDATE
REVISIONS:
RELEASED FOR:PLOT DATE:PROJECT NUMBER:PROJECT MANAGER:DESIGNED:DRAWN:CHECKED:SEAL302 Jefferson Street, Suite 110Raleigh, NC 27605Main: 919.829.9909Fax: [phone]www.res.us5/24/2019PRELIMINARY - NOT FOR CONSTRUCTIOND30405BPBAFMTRSBRCGIDEON STREAM MITIGATION SITE
DETAILS
SURRY COUNTY, NORTH CAROLINATYPICAL PLAN VIEWCHANNEL TOPOF BANKCHANNEL BOTTOMOF BANKCOIR MATTINGF
LOWBRUSH TOENTS1.OVER EXCAVATE THE OUTSIDE BEND OF THE CHANNEL. PLACE LARGERBRANCHES AND LOGS IN A CRISS-CROSS PATTERN. LOCK IN PLACE WITHFILL COVERING 6 IN TO 12 IN OF THE LARGER BRANCHES/SMALL LOGS.2.PLACE SMALLER BRANCHES AND BRUSH OVER THE LARGERBRANCHES/SMALL LOGS (HARDWOOD SPECIES ONLY) AND COMPACTLIGHTLY TOGETHER. BACKFILL AND COMPACT TO LOCK IN PLACE.3.PLACE LIVE CUTTINGS OVER THE SMALL BRANCHES AND BRUSH.ACCEPTABLE LIVE CUTTINGS SPECIES INCLUDE BLACK WILLOW (SALIX NIGRA)AND SILKY WILLOW (SALIX SERICEA). WILLOW CUTTINGS SHOULD BE RINSEDAT CUTTING POINT TO ALLOW BETTER ROOTING.4.INSTALL EROSION CONTROL (COIR) MATTING OVER COMPACTED SOIL PERDIRECTION OF ENGINEER. COIR MATTING SHOULD BE KEYED INTO TOP OFBANK.5.INSTALL 1 TO 3 ROWS OF LIVE STAKES ABOVE THE LIVE CUTTINGS LAYERPER DIRECTION OF ENGINEER.6.LIVE CUTTINGS SHOULD NOT EXTEND PAST 13 OF CHANNEL BOTTOM WIDTH.AASECTION A-ASMALL LOGS AND/ORLARGE BRANCHES WITH AMIN DIAMETER OF 4"SMALL BRANCHESAND BRUSHCOMPACTED SOIL LIFTTOP OF BANKLIVE STAKES1/4 MAX POOL DEPTH1/4 MAX POOL DEPTHLIVE CUTTINGSINSTALL COIR MATTING PER DETAILSEE DWG D1MIN 2.0'6"TOE PROTECTION(LARGER CHANNELS)KEY COIR MATTINGINTO BANK
A'APLAN VIEWSECTIONAL VIEW A - A'NOTES:REBAR (1/2" MINIMUM DIAMETER 3' MIN. LENGTHTYPICAL) SHOULD BE PLACED 1' TO 3' FROM END OFLOG. ADDITIONAL REBAR TO BE PLACED AT 6'OFFSETS. LAST REBAR SHOULD BE PLACED 1' TO 3'FROM END OF LOG. DUCK BILL ANCHORS MAY BEUSED AS A SUBSTITUTION FOR REBAR, 2 PER LOG.FLOODPLAIN SILLNTSDIFFUSE FLOW STRUCTURENTSSECTION A-A0.5% SLOPE(MAX)AAFLOW
VARIES (TYPICALLY 20' TO 40')VARIES (TYPICALLY 20' TO 40')NOTES:1.NO FLOODPLAIN GRADING IS ALLOWED WITHIN 10 FT OFTHE PROPOSED CHANNEL TOP OF BANK.2.LOGS SHOULD BE AT LEAST 10'-20' LONG AND AT LEAST 8INCHES IN DIAMETER, AND HARDWOOD.PLAN VIEWFLOWLOG STRUCTURE(SEE DETAIL)PROPOSEDLIMITSOF GRADINGGRADE AREA SUCH THATMAX SLOPE BELOW LOGSTRUCTURE IS 1%FILL DITCH SUCH THATTHE DOWNSTREAMELEVATION TIES INTOEXISTING GRADE OF THEFLOODPLAINPROPOSED CONSERVATIONEASEMENT LIMITSEXISTING DITCHBANKEXISTING DITCHTOP OF BANKEXISTINGDITCH INVERTLOG SILL(SEE DETAIL)PROPOSED GRADEEXISTING GRADETIE-IN TOEXISTINGFLOODPLAINELEVATIONFILL DITCH ANDINSTALL COIRMATTINGSECTION B-BEXISTINGGROUND3:1 MAX SLOPE3:1 MAXSLOPEFILL DITCHCUTBBCONSTRUCTPOOLINSTALL COIR MATTING PERMANUFACTURER'SINSTRUCTIONSMINIMUMDIAMETER12"6'REBARLOGS5'LENGTH VARIESDOWNVALLEY5/8" REBARPROPOSEDFLOODPLAINSURFACE5'6" (TYP.)BANKFULL LIMITS OFPROPOSED CHANNELSCALE: AS SHOWNFILE NAME:S:\@RES GIS\Projects\NC\Little Sebastian\CAD\DWG\675700_SHT_DETAILS.dwg SAVED BY: Tswartzfager
DRAWING TITLE:
PROJECT NAME:SHEET NUMBER:DESCRIPTIONMARKDATE
REVISIONS:
RELEASED FOR:PLOT DATE:PROJECT NUMBER:PROJECT MANAGER:DESIGNED:DRAWN:CHECKED:SEAL302 Jefferson Street, Suite 110Raleigh, NC 27605Main: 919.829.9909Fax: [phone]www.res.us5/24/2019PRELIMINARY - NOT FOR CONSTRUCTIOND40405BPBAFMTRSBRCGIDEON STREAM MITIGATION SITE
DETAILS
SURRY COUNTY, NORTH CAROLINANTSLOG SILLSECTION A-A (OPT 1)SECTION B-BFLOWTYPICAL PLAN VIEWAABBFLOWMIN. 5.0'5.0'MINHIGHLOWHIGHLOWNOTES:1.LOGS SHOULD BE RELATIVELY STRAIGHT HARDWOODAND RECENTLY HARVESTED2.HIGH SIDE OF LOG SHALL BE APPROX. 0.2' HIGHERTHAN LOW END3.LOG DIMENSIONS:MIN DIAM. = 12", MIN LENGTH = 18'NAIL FILTER FABRIC USING 3" 10D GALVANIZEDCOMMON NAIL EVERY 1.5' ALONG THE LOG4.DUCKBILL ANCHORS MAY BE USED IN PLACE OF REBARMIN. 4.0'CHANNEL TOPOF BANKCOARSE BACKFILLCHANNEL BOTTOMOF BANKREBAR OR DUCKBILLANCHORREBAR (5/8" MIN. DIAMETER, 4' MIN. LENGTH) ORDUCKBILL ANCHORS INSTALLED PERMANUFACTURERS INSTRUCTIONS (TYP.)COIR MATTINGPROPOSEDSTREAM BEDTACK FABRICTO LOGHEADER LOGFOOTER LOGBACKFILL WITH COARSEAGGREGATE (1" TO 5" DIA.)POOLBACKFILL WITH COARSEAGGREGATE (1" TO 5" DIA.)NON-WOVENGEOTEXTILE FABRIC(NCDOT TYPE II)NON-WOVENGEOTEXTILE FABRIC(NCDOT TYPE II)TOE PROTECTIONSECTION A-A (OPT 2)FLOWMIN. 5.0'REBAR OR DUCKBILLANCHORPROPOSEDSTREAM BEDTACK FABRICTO LOGBACKFILL WITH COARSEAGGREGATE (1" TO 5" DIA.)SEE PROFILE FORPOOL DEPTHSCOUR POOLNON-WOVENGEOTEXTILE FABRIC(NCDOT TYPE II)SEE PROFILE FORPOOL DEPTH
LINE PANELWOVEN WIRE:ASTM CLASS 3 GALVANIZED.TOP AND BOTTOM WIRES MIN. 12 GAUGE.INTERMEDIATE AND STAY WIRES MIN.12 1/2 GAUGE.NOTES:1.LINE POSTS (WOODEN): MIN. 4 IN. DIAM. OR 4 IN. SQUARE.2.LINE POSTS (STEEL): STUDDED OR PUNCHED T, U, OR Y SHAPED, WITH ANCHOR PLATES.3.MIN. WEIGHT 1.3 LBS./FT. (EXCLUDING ANCHOR PLATE). POSTS SHALL BE DRIVEN A MINIMUMOF 18" DEEP AND MUST BE AT LEAST 5.5 FT IN LENGTH4.SPECIES AND TREATMENT FOR ALL WOOD: USE UNTREATED DURABLE POSTS OF SPECIESSUCH AS RED CEDAR, BLACK LOCUST OR OSAGE-ORANGE WITH BARK REMOVED, ORNON-DURABLE WOOD THAT IS PRESERVATIVE PRESSURE TREATED (0.40 LBS./CUBIC FOOTCCA, OR EQUIVALENT NON-CCA TREATMENT). DO NOT USE RED PINE.WOVEN WIRE FENCE (NRCS DETAIL 382A)NTSWOVEN WIRE WITH ONE BARB DETAILTIMBER MAT CROSSINGTIMBER MAT APPROACHTOP OF BANKCLASS B RIP RAPTIMBER MAT INSTALLEDPERPENDICULARTIMBER MAT INSTALLEDPARALLELTIMBER MAT(TYP)CARRIAGE BOLTFLOWTOE OF BANK(TYP)TIMBER MAT INSTALLEDPERPENDICULARTOP OF BANKCLASS B RIP RAPCARRIAGE BOLT(TYP)FILTER FABRICAPPROXIMATE BASE FLOWWATER SURFACE(5' MIN)RIP RAP APPROACHTIMBER MATINSTALLED PARALLELTOE OF BANKPLAN VIEWSECTION VIEWTIMBER MAT TEMPORARY CROSSINGNTSNOTES:1.TIMBER MATS SHALL BE USED FOR TEMPORARYCONSTRUCTION ACCESS TO TRAVERSE WET AND/OR MUDDYARES ADJACENT TO THE STREAM AND TO CROSS THESTREAM AND OTHER CONCENTRATED FLOW AREAS.2.THE STREAM CROSSING SHALL BE INSTALLED WHEN FLOW ISLOW. THERE SHALL BE MINIMAL TO NO DISTURBANCE OF THECHANNEL BED AND BANKS AS A RESULT OF INSTALLING THEAPPROACHES OR CROSSING.3.THE LENGTH OF TIMBER MAT REQUIRED TO CROSS THESTREAM OR CONCENTRATED FLOW AREAS SHALL BE SUCHTHAT THE TIMBER MAT EXTENDS PAST THE TOP OF BANK ONEACH SIDE OF THE CROSSING A SUFFICIENT DISTANCE TOSUPPORT THE MAXIMUM EQUIPMENT SIZE USING THECROSSING.4.STREAM CROSSINGS SHALL BE INSTALLED WITH THE TIMBERMAT LENGTHS ORIENTED PERPENDICULAR TO THE TOPS OFTHE STREAM BANKS. TIMBER MAT STREAM APPROACHESSHALL BE INSTALLED WITH THE TIMBER MAT LENGTHSORIENTED PARALLEL TO THE TOPS OF THE STREAM BANKS.5.STREAM CROSSING APPROACHES FROM DRY AREAS SHALLBE CONSTRUCTED USING CLASS B RIP RAP PLACED OVERFILTER FABRIC.6.ALL TIMBER MATS, FILTER FABRIC, AND RIP RAP SHALL BECOMPLETELY REMOVED FROM THE SITE WHEN THE CROSSINGIS REMOVED.NOTES:1.CONSTRUCT STREAM CROSSING WHEN FLOW IS LOW.2.INSTALL STREAM CROSSING PERPENDICULAR TO FLOW.3.CONTRACTOR TO COORDINATE APPROPRIATE BEDDING MATERIAL WITH MANUFACTURER.4.FILTER FABRIC USED SHALL BE NCDOT TYPE 2 ENGINEERING FABRIC OR EQUIVALENT.5.WIDTH OF TYPICAL FARM CROSSINGS SHALL BE PER PLAN OR A MINIMUM OF 12'.6.WHEN REQUIRED, CONTRACTOR TO ENSURE PIPE MATERIAL AND COVER MEET H-20 LOADINGREQUIREMENTS.PROPOSED CULVERT CROSSINGNTSSTREAM CHANNELFLOW MIN 3'MIN 3'PLAN VIEWSECTION VIEW2" - 3"LINE POSTWOVEN WIREBARBED ORELECTRIC WIRELINE POST16' MAX.BARBED ORELECTRICWIREWOVEN WIREGROUND LINE4" TO 6"LINE POST3" MIN.32" TO 42"6"6' MIN.2' MIN.MIN. 18"FILTER FABRICCOARSE AGGREGATE(#5 WASHED STONE) 6"DEEPEARTH FILL COVERED BYLARGE ANGULAR ROCKPIPE SIZE PER PLANINVERT PER PLAN BURYCULVERT 0.6' UNLESSNOTED OTHERWISE BYENGINEERINSTALL CLAY PLUG 2FEET BELOW CULVERTINVERTCOARSE AGGREGATEEARTH FILL COVEREDBY LARGE ANGULARROCKLOG OR ROCK SILL SET TOPOF LOG 1FOOT ABOVECULVERT INVERTTOP OF BANKLOG OR ROCK SILL;SET TOP A MINIMUM OF0.6' ABOVE CULVERTINVERT10' MIN.10' MIN.SCALE: AS SHOWNFILE NAME:S:\@RES GIS\Projects\NC\Little Sebastian\CAD\DWG\675700_SHT_DETAILS.dwg SAVED BY: Tswartzfager
DRAWING TITLE:
PROJECT NAME:SHEET NUMBER:DESCRIPTIONMARKDATE
REVISIONS:
RELEASED FOR:PLOT DATE:PROJECT NUMBER:PROJECT MANAGER:DESIGNED:DRAWN:CHECKED:SEAL302 Jefferson Street, Suite 110Raleigh, NC 27605Main: 919.829.9909Fax: [phone]www.res.us5/24/2019PRELIMINARY - NOT FOR CONSTRUCTIOND50405BPBAFMTRSBRCGIDEON STREAM MITIGATION SITE
DETAILS
SURRY COUNTY, NORTH CAROLINALOG OR ROCK SILLPOOLFLOWA'ASTREAM BED13 W13 W20°-30
°13 WPLAN VIEWLOG CROSS VANENTSNOTES:1.LOGS SHALL BE OF A MINIMUM OF 12' IN LENGTH AND 10" IN DIAMETER AND RELATIVELY STRAIGHT HARDWOOD,RECENTLY HARVESTED.2.FILTER FABRIC SHALL BE USED TO SEAL THE GAPS BETWEEN THE LOG(S) AND THE STREAM BED, UNDER THE COARSEBACKFILL MATERIAL. THERE SHALL BE NO FILTER FABRIC VISIBLE IN THE FINISHED WORK; EDGES SHALL BE FOLDED,TUCKED, OR TRIMMED AS NEEDED.3.COARSE BACKFILL SHALL BE PLACED TO A THICKNESS EQUAL TO THE DEPTH OF THE LOGS AND SHALL EXTEND OUTFROM THE VANE ARMS TO THE STREAM BANK AND UPSTREAM.4.AS AN OPTION, FLAT-SIDED BOULDERS MAY BE PLACED AS BALLAST ON TOP OF THE STREAM BANK SIDE OF THEEMBEDDED VANE ARMS. REBAR OR DUCK BILL ANCHORS MAY BE USED IN LIEU OF BALLAST BOULDERS.5.REBAR OR DUCKBILL ANCHORS WITH GALVANIZED CABLE ATTACHED MAY BE USED TO SECURE LOGS INTO THESTREAM BED AND/OR BANKS. FLAT SIDED BOULDERS CAN BE USED IN LIEU OF THE LOG INVERT/DUCKBILL ANCHORSYSTEM.4'FILTER FABRICSTREAM BANKS,TYPICALPOINT REFERENCEDIN PROFILECROSS LOGBANKFULLTOE OF BANK, TYPICALCOARSE AGGREGATEBACKFILL (2" TO 6")VANE ARM HEADER LOGOPTIONAL BALLAST BOULDERREBAR AND/ORCABLING, TYP.SEE NOTECUT LOGS TO MAKE FLUSHCONNECTION. REBAR END OFLOGS TOGETHER. OVERLAPWITH FILTER FABRICKEY STRUCTURE INTO BANK.ELEVATION VARIES BASEDON ARM SLOPE3% TO 8%SECTION B-B'COARSE AGGREGATEBACKFILL (1.5" TO 5")INVERT LOGVANE ARM LOGFLOW4'0.8' MAX.FILTER FABRICBB'PROFILE VIEWBANKFULLBANKFULLSTREAM BANKCOARSE AGGREGATEBACKFILL (2" TO 6")CROSS LOGVANE ARMHEADER LOGREBAR AND/ORCABLING, TYP.SEE NOTEEXCAVATED POOL. SEETYPICAL CROSS SECTIONSFOR DEPTHNAIL ALL UPSTREAMFACES OF LOGSWITH FILTER FABRICPOINT REFERENCEDIN PROFILEMIN4'4'SECTION A-A'BANKFULLVANE ARMHEADER LOGVANE ARMFOOTER LOGSTREAM BED IN POOLFILTER FABRICSTREAM BANKCOARSE AGGREGATEBACKFILL (2" TO 6")VANE ARMFOOTER LOGVANE ARM FOOTER LOG
PLAN VIEWPROFILECROSS SECTION A-A'FLOWVARIESEND RIFFLE CONTROL POINTPROPOSED TOPOF BANKBEGIN RIFFLECONTROL POINTVARIES CHANNELBOTTOM WIDTHBEGIN RIFFLEEND RIFFLERIFFLE MATERIALFLOWTOP OF BANKTOE OF BANK4' MIN 4' MIN4'MIN4'MINRIFFLERUNGLIDESMALL POOLLARGE COBBLE/SMALL BOULDERSLOGS/WOODYDEBRISLOGS/WOODYDEBRISTOP OF BANK4.0' (TYP)RIFFLE MATERIAL1.25' MIN0.75' MINTOP OF BANKPROPOSED TOE OF BANKGRADE CONTROL ROCK50/50 MIX OF CLASS A ANDB RIPRAPLOGS/WOODY DEBRISSMALL POOL, TYP4.0'TYPLARGE COBBLE/SMALLBOULDERS, TYPRIFFLE MATERIAL;EQUAL MIX OF SURGESTONE AND NATIVESUBSTRATE MATERIALFLOWTHALWEGTHALWEGCHANNELBOTTOM WIDTH4.0' (TYP)4.0'TYPNOTES:1.CONSTRUCTED RIFFLES SHALL BE INSTALLED IN NEWLY GRADED CHANNEL SECTIONS, AS SPECIFIED BY THE DESIGNER.2.ELEVATION CONTROL POINTS SHALL BE DESIGNATED AT THE BEGINNING AND END OF RIFFLE POINTS TO ESTABLISH PART OF THE PROFILE OF THE CHANNEL. SURVEY OF CONTROL POINTS SHALL BEREQUIRED TO ESTABLISH ACCURATE RIFFLE INSTALLATION WITHIN A TOLERANCE OF ±0.2'.3.GRADE CONTROL ROCK SHALL BE COMPRISED OF A 50/50 MIX OF CLASS A AND B RIPRAP. GRADE CONTROL ROCK SHALL BE PLACED SUCH THAT THE ADDITION OF THE SPECIFIED THICKNESS OF RIFFLEMATERIAL SHALL ACHIEVE THE DESIGNATED GRADES.4.RIFFLE MATERIAL SHALL BE COMPRISED OF ROCKS AND WOOD. THE ROCK MATERIAL SHALL CONSIST OF AN EQUAL MIX OF SURGE STONE AND NATIVE SUBSTRATE MATERIAL. RIFFLE MATERIAL SHALL BEEXCAVATED, STOCKPILED, AND RE-USED FROM ABANDONED CHANNEL SECTIONS. OTHERWISE ROCK RIFFLE MATERIAL SHALL BE SLIGHTLY ROUNDED, “RIVER-TYPE” ROCK, UNLESS OTHER ROCKCHARACTERISTICS ARE APPROPRIATE FOR THE CHANNEL. IN ADDITION, LOGS AND WOODY DEBRIS SHALL BE INCLUDED WITH THE ROCK MATERIAL AS SPECIFIED BY THE DESIGNER.5.THE PLACEMENT OF GRADE CONTROL ROCK AND/OR RIFFLE MATERIAL SHALL BE DONE IN A MANNER TO CREATE A SMOOTH PROFILE, WITH NO ABRUPT “JUMP” (TRANSITION) BETWEEN THE UPSTREAMPOOL-GLIDE AND THE RIFFLE, AND LIKEWISE NO ABRUPT “DROP” (TRANSITION) BETWEEN THE RIFFLE AND THE DOWNSTREAM RUN-POOL. THE FINISHED CROSS SECTION OF THE RIFFLE MATERIAL SHALLGENERALLY MATCH THE SHAPE AND DIMENSIONS SHOWN ON THE RIFFLE TYPICAL SECTION WITH SOME VARIABILITY OF THE THALWEG LOCATION AS A RESULT OF THE SMALL POOLS AND LOGS.6.THE END OF RIFFLE CONTROL POINT MAY TIE IN TO ANOTHER IN-STREAM STRUCTURE (LOG SILL OR J-HOOK).7.THE CONSTRUCTED RIFFLE SHALL BE KEYED IN TO THE STREAM BANKS AND/OR BED AS DESIGNATED BY THE DESIGNER. THE "KEY" SHALL EXTEND BEYOND THE TOP OF BANK AT THE BEGINNING (CREST) OFTHE RIFFLE. WHERE PRESERVATION OF EXISTING STREAM BANK VEGETATION IS A PRIORITY A "KEY" MAY NOT BE USED (OR THE DIMENSIONS MAY BE ADJUSTED) TO LIMIT DISTURBANCE.RIFFLE MATERIAL;EQUAL MIX OF SURGESTONE AND NATIVESUBSTRATE MATERIALGRADE CONTROL ROCK50/50 MIX OF CLASS A ANDB RIPRAPRIFFLE GRADE CONTROLNTSAASCALE: AS SHOWNFILE NAME:S:\@RES GIS\Projects\NC\Little Sebastian\CAD\DWG\675700_SHT_DETAILS.dwg SAVED BY: Tswartzfager
DRAWING TITLE:
PROJECT NAME:SHEET NUMBER:DESCRIPTIONMARKDATE
REVISIONS:
RELEASED FOR:PLOT DATE:PROJECT NUMBER:PROJECT MANAGER:DESIGNED:DRAWN:CHECKED:SEAL302 Jefferson Street, Suite 110Raleigh, NC 27605Main: 919.829.9909Fax: [phone]www.res.us5/24/2019PRELIMINARY - NOT FOR CONSTRUCTIOND60405BPBAFMTRSBRCGIDEON STREAM MITIGATION SITE
DETAILS
SURRY COUNTY, NORTH CAROLINA POOLPOOLFLOWTOP OF BANKSTEP ELEVATIONCONTROL POINTPOOLPOOLPOOLBALLAST BOULDERPOOL ELEVATIONCONTROL POINTTIE-IN TO STREAMBANK (TYP.)FLOWHEADER LOGTIE-IN TO STREAMBED (TYP.)A'ASTREAM BANKPROTECTIONANGLED LOG STEP POOLNTSTOP OF BANKBALLAST BOULDERFOOTER LOGHEADER LOGSTEP ELEVATIONCONTROL POINTUPSTREAM POOL ELEVATIONCONTROL POINTCOARSE AGGREGATEBACKFILL (1" TO 5")STEP ELEVATIONCONTROL POINTPOOL ELEVATIONCONTROL POINTBANKFULLHEADER LOGFOOTER LOGFILTER FABRICNOTES:1.LOGS SHALL BE OF A MINIMUM OF 15' IN LENGTH AND 10" IN DIAMETER AND RELATIVELYSTRAIGHT HARDWOOD, RECENTLY HARVESTED.2.A SINGLE LOG MAY BE USED IN LIEU OF A HEADER/FOOTER LOG COMBINATION, PERDIRECTION OF DESIGNER.3.FILTER FABRIC SHALL BE USED TO SEAL THE GAPS BETWEEN THE LOG(S) AND THE STREAMBED, UNDER THE COARSE BACKFILL MATERIAL. THERE SHALL BE NO FILTER FABRIC VISIBLEIN THE FINISHED WORK; EDGES SHALL BE FOLDED, TUCKED, OR TRIMMED AS NEEDED.4.COARSE BACKFILL SHALL BE PLACED TO A THICKNESS EQUAL TO THE DEPTH OF THEHEADER (AND ANY FOOTER) LOGS AND SHALL EXTEND OUT FROM THE VANE ARMS TO THESTREAM BANK AND UPSTREAM.5.AS AN OPTION, FLAT-SIDED BOULDERS MAY BE PLACED AS BALLAST ON TOP OF THESTREAM BANK SIDE OF THE EMBEDDED VANE ARMS. DUCK BILL ANCHORS MAY BE USED INLIEU OF BALLAST BOULDERS.6.DUCKBILL ANCHORS WITH GALVANIZED CABLE ATTACHED MAY BE USED TO SECURE LOGSINTO THE STREAM BED AND/OR BANKS. FLAT SIDED BOULDERS CAN BE USED IN LIEU OFTHE LOG INVERT/DUCKBILL ANCHOR SYSTEM.PLAN VIEWPROFILESECTION VIEW
SCALE: AS SHOWNFILE NAME:S:\@RES GIS\Projects\NC\Little Sebastian\CAD\DWG\675700_SHT_DETAILS.dwg SAVED BY: Tswartzfager
DRAWING TITLE:
PROJECT NAME:SHEET NUMBER:DESCRIPTIONMARKDATE
REVISIONS:
RELEASED FOR:PLOT DATE:PROJECT NUMBER:PROJECT MANAGER:DESIGNED:DRAWN:CHECKED:SEAL302 Jefferson Street, Suite 110Raleigh, NC 27605Main: 919.829.9909Fax: [phone]www.res.us5/24/2019PRELIMINARY - NOT FOR CONSTRUCTIOND70405BPBAFMTRSBRCGIDEON STREAM MITIGATION SITE
DETAILS
SURRY COUNTY, NORTH CAROLINA HEADER AND FOOTERBOULDERSPOOLFLOWCROSS VANE INVERTCONTROL POINTFILTER FABRICSTREAM BANKTOE OF BANKBANKFULLFOOTER ROCKLEFT OR RIGHT VANE ARMBANK INTERCEPTCONTROL POINTPOOLHEADER ROCKBANKFULLVARIES0' TO 0.8'3% TO 5%BANKFULLHEADER BOULDERFOOTER BOULDERSTREAM BEDIN POOLFILTER FABRICVARIES0' TO 13 WIDTHFLOWSTREAM BANKTOE OF BANKFLOWCOARSE AGGREGATEBACKFILL (1" TO 5")SECTION A-A'PROFILE VIEWCOARSE AGGREGATEBACKFILL (1" TO 5")MIN5.0'COARSE AGGREGATEBACKFILL (1" TO 5")RIGHT VANE ARMBANK INTERCEPTCONTROL POINTLEFT VANE ARMBANK INTERCEPTCONTROL POINT13 CHANNELWIDTH13 CHANNELWIDTH13 CHANNELWIDTHMIN5.0'20° TO 30°PLAN VIEWFILTERFABRICFOOTER BOULDERHEADER BOULDER13 CHANNELWIDTH13 CHANNELWIDTH13 CHANNELWIDTHVANE ARM BANKINTERCEPT CONTROLPOINTVANE ARM BANKINTERCEPT CONTROLPOINTSECTION B-B'BBAAROCK CROSS VANENTSHEADER AND FOOTERBOULDERSPOOLFLOWCROSS VANE INVERTCONTROL POINTFILTER FABRICSTREAM BANK, TYPICALTOE OF BANK, TYPICALBANKFULL, TYPICALFOOTER ROCKSLEFT OR RIGHT VANE ARMBANK INTERCEPTCONTROL POINTPOOLHEADER ROCKSBANKFULLVARIES0' TO 0.8'2% TO 5%BANKFULLHEADER BOULDERFOOTER BOULDERSTREAM BEDIN POOLFILTER FABRICVARIES0' TO 13 WIDTHFLOWSTREAM BANKTOE OF BANKFLOWCOARSE AGGREGATEBACKFILL (1" TO 5")SECTION A-A'PROFILE VIEWCOARSE AGGREGATEBACKFILL (1" TO 5")MIN5.0'COARSE AGGREGATEBACKFILL (1" TO 5")RIGHT VANE ARMBANK INTERCEPTCONTROL POINTLEFT VANE ARMBANK INTERCEPTCONTROL POINT13 CHANNELWIDTH13 CHANNELWIDTH13 CHANNELWIDTHMIN5.0'20° TO 30°PLAN VIEWFILTERFABRICFOOTER BOULDERHEADER BOULDER13 CHANNELWIDTH13 CHANNELWIDTH13 CHANNELWIDTHVANE ARM BANKINTERCEPT CONTROLPOINTVANE ARM BANKINTERCEPT CONTROLPOINTSECTION B-B'BBAAROCK A-VANENTSPOOLFILTER FABRICPOOLSTEP INVERTCONTROL POINTSTEP POOLNTSFLOWPROFILE VIEW STREAM INVERTCONTROL POINTBANKFULLBACKFILL EXISTINGCHANNEL WITH NATIVEMATERIAL AS NEEDEDFOOTER ROCKHEADER ROCKWOODYDEBRISSECTION A-A'FOOTER ROCKWELL GRADED MIX OF#57 STONE, CLASS AAND B RIPRAPFILTER FABRICSTREAM BED0.8' MAX (TYP.)1.5x RIFFLEDEPTH (TYP.)HEADER ROCKBANKFULLNTSROCK SILLSECTION A-ASECTION B-BFLOWCOARSE BACKFILLCHANNEL TOPOF BANKCHANNEL BOTTOMOF BANKTYPICAL PLAN VIEWAABBFLOWPROPOSEDSTREAM BEDMIN. 5.0'5.0'MINNOTES:1.BOULDERS DIMENSIONS SHALL BE AT LEAST:REACH TC1-A: 3.0' X 2.0' X 2.0'REACH TC2, TC3, & TC6: 2.0' X 2.0' X 1.5'2.COARSE AGGREGATE BACKFILL SHALL CONSIST OF A MIX OF GRAVEL, BALLAST STONE,AND CLASS A RIPRAP.3.THE BOULDER SILL IS GENERALLY CONSTRUCTED AS FOLLOWS:A.PLACE FOOTER BOULDERS. A LAYER OF BEDDING MATERIAL UNDER THE FOOTERBOULDERS MAY BE SPECIFIED BY THE DESIGNER. THERE SHALL BE NO GAPSBETWEEN BOULDERS.B.INSTALL FILTER FABRIC.C.PLACE COURSE BACKFILL BEHIND THE FOOTER BOULDERS.D.INSTALL HEADER BOULDERS ON TOP OF AND SET SLIGHTLY BACK FROM THE FOOTERBOULDERS (SUCH THAT PART OF THE HEADER BOULDER IS RESTING ON THE COARSEBACKFILL). HEADER BOULDERS SHALL SPAN THE SEAMS OF THE FOOTERBOULDERS. THERE SHALL NOT BE A SEAM IN THE CENTER OF THE STREAM BED (ATTHE THALWEG). THERE SHALL BE NO GAPS BETWEEN BOULDERS.E.PLACE COARSE BACKFILL BEHIND HEADER BOULDERS ENSURING THAT ANY VOIDSBETWEEN THE BOULDERS ARE FILLED.4.BACKFILL SHALL BE COMPACTED IN 12" LIFTS.PROPOSED STREAMBANKSTREAM BEDFOOTER BOULDER, TYPICALSILL CONTROL POINT ELEVATIONHEADER BOULDERFOOTER BOULDERSILL CONTROL POINTELEVATIONTOP OF BANKHEADER BOULDER, TYPICALCOARSE AGGREGATEBACKFILL (1" TO 4")FILTER FABRIC(804.2.11 CLASS 2)BANKFULL
BANKFULL
STREAM INVERTCONTROL POINTFLOWAANOTES:1.SEE STRUCTURE BOULDER SIZE TABLE FOR APPROXIMATE DIMENSIONS OFBOULDERS. THE UPPER LIMIT FOR BOULDERS SHALL BE APPROVED BY THEENGINEER PRIOR TO INSTALLATION OF THE STRUCTURE.2.CROSS VANES SHALL BE CONSTRUCTED SO THAT ADJOINING BOULDERS TAPER INAN UPSTREAM DIRECTION, FROM THE BANKFULL ELEVATION TO THE STREAMINVERT. THE UPSTREAM END OF THE CROSS VANE IS SET AT AN ANGLE OF 20 TO30 DEGREES TANGENT TO THE PROJECTED STREAM BANK DIRECTION. THE TOPELEVATION OF BOTH VANES WILL DECREASE TOWARD THE CENTER OF THECHANNEL.3.THE DOWNSTREAM END OF THE CROSS VANE SHALL BE KEYED INTO THESTREAMBANK AT THE BANKFULL ELEVATION. THE CROSS VANE SHALL BE KEYED AMINIMUM OF FIVE FEET INTO THE STREAMBANK. THE UPSTREAM END OF CROSSVANE SHALL BE KEYED INTO THE STREAMBANK AT THE DESIGNED STREAMBEDINVERT ELEVATION.4.VANE BOULDERS SHALL BE PLACED IN A LINEAR FASHION SO AS TO PRODUCE THESLOPING CROSS VANE, AND SHALL BE PLACED WITH TIGHT, CONTINUOUS SURFACECONTACT BETWEEN ADJOINING BOULDER. BOULDER SHALL BE PLACE SO AS TOHAVE NO SIGNIFICANT GAPS BETWEEN ADJOINING BOULDER.5.VANE BOULDERS SHALL BE PLACED SO AS TO HAVE A FINAL SMOOTH SURFACEALONG THE TOP PLANE OF THE CROSS VANE. NO VANE BOULDER SHALL PROTRUDEHIGHER THAN THE OTHER BOULDER IN THE BOULDER VANE. A COMPLETED CROSSVANE HAS A SMOOTH, CONTINUOUS FINISH GRADE FROM THE BANKFULLELEVATION TO THE STREAMBED.6.AS THE CROSS VANE IS CONSTRUCTED, THE CONTRACTOR SHALL CHINK ALL VOIDSBETWEEN THE FOOTER BOULDERS, AND BETWEEN THE FOOTER BOULDERS ANDVANE BOULDERS. VOIDS SHALL BE CHINKED WITH SMALLER ROCK SUCH THAT NOVOIDS GREATER THAN FOUR INCHES IN SIZE WILL BE PRESENT.XZY3 PRIMARY ROCK DIMENSIONS:X.LONGEST DIMENSIONY.SHORTEST DIMENSIONZ.INTERMEDIATE DIMENSIONNOTES:1.STEP POOL ROCKS MUST HAVE AN INTERMEDIATE DIAMETER OF 12" TO 14" FOR HEADERS AND 14" TO 18" FOR FOOTERS.2.BACKFILL MATERIAL, IF NEEDED TO ESTABLISH A STEP-POOL SUBPAVEMENT AND/OR TO RAISE THE CHANNEL BED DUE TO SCOUR/INCISION, SHALL BE OF A TYPE, SIZE, AND GRADATION ASSPECIFIED BY THE DESIGNER. BACKFILL SHALL BE PLACED SUCH THAT THE ADDITION OF THE SPECIFIED THICKNESS OF STEP-POOL MATERIAL SHALL ACHIEVE THE DESIGNATED GRADES.3.STEP-POOL BED MATERIAL SHALL BE OF A TYPE, SIZE, AND GRADATION AS SPECIFIED BY THE DESIGNER TO BE MOBILE OR NON-MOBILE AS THE CONDITIONS IN THE CHANNEL WARRANT (I.E. –CLEAN-WATER DISCHARGE ENVIRONMENT, HIGH BEDLOAD SYSTEM, ETC.) BED MATERIAL SHALL BE EXCAVATED, STOCKPILED, AND RE-USED FROM ABANDONED CHANNEL SECTIONS WHEREVERPRACTICAL. OTHERWISE BED MATERIAL SHALL BE SLIGHTLY ROUNDED, “RIVER-TYPE” ROCK, UNLESS OTHER ROCK CHARACTERISTICS ARE APPROPRIATE FOR THE CHANNEL. LOGS AND OTHERWOODY DEBRIS MAY BE INCORPORATED INTO THE STEP-POOL BED MATERIALS.4.STEP-POOL INVERTS SHALL CONSIST OF BOULDERS OF AN INTERMEDIATE DIAMETER OF 12" TO 14" AND FOOTERS SHALL HAVE AN INTERMEDIATE DIAMETER OF 14" TO 18". INVERTS SHALLBE SET AT A DROP/RISE FROM THE ADJACENT UPSTREAM/DOWNSTREAM INVERT TO ACCOMMODATE THE PASSAGE OF FISH. THE INVERTS SHALL FORM THE THALWEG OF THE STEP POOLSTRUCTURE. POOLS SHALL BE FORMED BETWEEN THE INVERTS TO THE DIMENSIONS SPECIFIED BY THE DESIGNER.5.THE BENCH OF THE STEP-POOL STRUCTURE SHALL BE FORMED BESIDE THE POOL AT THE DIMENSIONS SPECIFIED BY THE DESIGNER. THE BENCH SHALL BE FORMED OF STEP-POOLMATERIALS PLACED TO A DEPTH SUCH THAT THEIR SURFACE MATCHES THE STEP-POOL INVERT IMMEDIATELY UPSTREAM.6.USE CLASS A AND B RIPRAP TO FILL GAPS ON UPSTREAM SIDE OF STEP POOL ROCKS.7.AFTER ALL STONE HAS BEEN PLACED, FILL IN THE UPSTREAM SIDE OF THE STRUCTURE WITH CLASS A AND B RIPRAP TO THE ELEVATION OF THE TOP OF THE HEADER ROCK.8.FILTER FABRIC SHALL MEET SPECIFICATIONS FOR NCDOT WOVEN FILTER FABRIC.