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Home My WebLink About20190495 Ver 1_Cowford Mitigation Site_20220630Mitigation Project Information Upload ID#* 20190495 Version* 1 Select Reviewer: * Erin Davis Initial Review Completed Date 06/30/2022 Mitigation Project Submittal - 6/30/2022 .................................................................................................................................................................................................................................................................. Is this a Prospectus, Technical Proposal or a New Site? * 0 Yes O No Type of Mitigation Project:* Stream Wetlands Buffer Nutrient Offset (Select all that apply) Project Contact Information Contact Name: * Bradley P Breslow Project Information ID#:* 20190495 Existing ID# Project Type: Project Name: County: • DMS Mitigation Bank Cowford Mitigation Site Onslow Document Information Mitigation Document Type:* Mitigation Plans File Upload: Signature ............................................ Print Name: * Signature: * Email Address:* bbreslow@res.us Version:* 1 Existing Version Cowford Mitigation Site.pdf 17.35MB Please upload only one PDF of the complete file that needs to be submitted... Bradley P Breslow FILE NAME:R:\Resgis\dropboxgis\projects\NC\Cowford\CAD\DWG\0675_SHT COVER.dwg SAVED BY: Sfasking 4' esa Jar mantcwn Haw Brzrrch Corner Huffrnai'town x z, a' P.ichands 1 25B z Gwar y Forks 1, PROJECT LOCATION • 41 Brac ks Ccrnforl u c V Gum eras' VICINITY MAP N TS PROJECT COORDINATES: 34.9233, -77.59 1 7 Know what's below. Call before you dig NOTICE TO CONTRACTOR PRIOR TO CONSTRUCTION, DIGGING, OR EXCAVATION THE CONTRACTOR IS RESPONSIBLE FOR LOCATING ALL UNDERGROUND UTILITIES (PUBLIC OR PRIVATE) THAT MAY EXIST AND CROSS THROUGH THE AREA(S) OF CONSTRUCTION, WHETHER INDICATED ON THE PLANS OR NOT. CALL "8 I I " A MINIMUM OF 72 HOURS PRIOR TO DIGGING OR EXCAVATING. REPAIRS TO ANY UTILITY DAMAGED RESULTING FROM CONSTRUCTION ACTIVITIES SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR. PROJECT DIRECTORY DESIGNED FOR: LINDSAY CROCKER NC DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF MITIGATION SERVICES 2 1 7 WEST JONES ST., SUITE 3000A RALEIGH, NC 27603 DESIGNED BY: RESOURCE ENVIRONMENTAL SOLUTIONS, LLC 3600 GLENWOOD AVE., SUITE 100 RALEIGH, NC 276 1 2 SURVEYED BY: WSP USA, INC. 1 28 TALBERT ROAD SUITE A MOORESVILLE, NC 281 1 7 DMS PROJECT #: 100095 CONTRACT #: 7746 USACE ACTION ID #: SAW-20 1 9-00487 RFP #: 16-007577 DWR #: 2019-0495 PROJECT TOPOGRAPHY AND EXISTING CONDITIONS PLANIMETRICS SURVEY WAS PROVIDED BY WSP USA, INC. (NC FIRM LICENSE NUMBER F-089 1 , J. BRANDON HICKS, NC PLS L-52 1 9), DATED SEPTEMBER 1 9, 2019 COWFORD MITIGATION SITE ONSLOW COUNTY WHITE OAK RIVER BASIN: HUC 03030001 AUGUST 2020 RESOURCE ENVIRONMENTAL SOLUTIONS, LLC REACH KJ I -C / / 3600 GLENWOOD AVE, SUITE 100 RALEIGH, NC 27612 WETLAND WA DITCH B oc REACH KJ I -A DITCH A SITE MAP NTS \a\ -c-,., -' .....‹.1t%--. ••-\, REACH KJ I -B „7_,..." Sheet List Table Sheet Number Sheet Title - COVER A I OVERALL AERIAL E I NOTES E2 EXISTING CONDITIONS S I REACH KJ 52 REACH KJ 53 REACH KJ 54 REACH KJ 55 REACH KJ 56 REACH KJ 57 SWALE A 58 SWALE B W I WETLAND PLAN P I PLANTING PLAN D I DETAILS D2 DETAILS D3 DETAILS D4 DETAILS D5 DETAILS DG DETAILS i res 3600 Glenwood Ave, Suite 100 Raleigh, NC 27612 Main: 919.829.9909 www.res.us Engineering Services Provided By: Angler Environmental LLC License: F-1428 SEAL 0 '.....d..'wo....l',e. rii 4 REVISIONS: PLOT DATE: 10/2/2020 RELEASED FOR: PRELIMINARY - NOT FOR CONSTRUCTION PROJECT NUMBER: PROJECT MANAGER: DESIGNED: DRAWN: CHECKED: 0675 MB BRC SCF AFM SHEET NUMBER: FILE NAME:R:\Resgis\dropboxgis\projects\NC\Cowford\CAD\DWG\0675_SHT ESC.dwg SAVED BY: Sfasking Cowford Project Credits Stream Components Reach Mitigation Type Proposed Length (LF) 1%lltigation Ratio SMUs KJ1-A KJ1-B KJ1-C Restoration (HWV Restoration Restoration 923 852 1,572 1 : 1.0 I:1.0 1:1.0 913 852 1,572 Total 3,347 3,337 *Restoration (HWV) SMUs arc bascd on proposed valley length, not proposcd stationing Wetland Components Wetland Mitigation Type Proposed Acreage Mitigation Ratio WMUs WA Re-establishment 2.991 1:1.0 2.991 Total 2.991 2.991 SN. \ \ .\ 0 \�\ `TB % \\ \ I \ .;..M ,,i xioStwe�.m*it:'');$ DITCh B cc />76\ LCE gal LCE DITCh A TB� TB 7 91 . TB _ J res 3600 Glenwood Ave, Suite 100 Raleigh, NC 27612 Main: 919.829.9909 www.res.us Engineering Services Provided By: Angler Environmental, LLC License: F-1428 SEAL 0 '' '' ..'' ' ' . . °° . .... i 1'14.0°,0 lt '''.'>40 "... 7.00 00 1 "=100 200 FULL SCALE: 100 2" = FULL SCALE 1" = HALF SCALE REVISIONS: PLOT DATE: 10/2/2020 RELEASED FOR: PRELIMINARY - NOT FOR CONSTRUCTION PROJECT NAME: COWFORD MITIGATION SITE ONSLOW COUNTY DRAWING TITLE: OVERALL AERIAL PROJECT NUMBER: PROJECT MANAGER: DESIGNED: DRAWN: CHECKED: 0675 MB BRC SCF AFM SHEET NUMBER: Al .. J FILE NAME:R:\Resgis\dropboxgis\projects\NC\Cowford\CAD\DWG\0675_SHT_SITE.dwg SAVED BY: Sfasking STREAM CONSTRUCTION NOTES: I . ALL PROPOSED CHANNELS AND TEMPORARY AND PERMANENT CROSSINGS SHALL BE CONSTRUCTED IN A DRY CONDITION VIA OFFLINE CONSTRUCTION WHERE POSSIBLE. PUMP AROUND OPERATIONS SHOULD 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 END OF EACH DAY TO RESTORE NORMAL FLOW BACK TO THE CHANNEL UNLESS OTHERWISE APPROVED BY THE ENGINEER. WITH APPROVAL, A PUMP AROUND MAY BE ALLOWED TO RUN CONTINUOUSLY IF THERE IS NO FORECAST FOR RAIN OVERNIGHT, AND/OR THE PUMP APPARATUS IS MAINTAINED AND MONITORED CONTINUOUSLY. 3. CONSTRUCT UPSTREAM PORTION OF THE CHANNEL FIRST, WORKING IN AN UPSTREAM TO DOWNSTREAM DIRECTION, UNLESS OTHERWISE APPROVED BY THE ENGINEER. 4. REMOVE AND STOCKPILE TOPSOIL WITHIN AREAS THAT ARE TO BE CUT 9" OR MORE BELOW EXISTING GRADE. 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 THE STRUCTURE TABLES) USING METHODS DESCRIBED IN THE DETAIL SHEETS. PRIOR TO FINE GRADING, OBTAIN APPROVAL OF THE ENGINEER ON INSTALLATION OF STRUCTURES. 6. UPON COMPLETION OF FINE GRADING, INSTALL STREAM BANK STABILIZATION INCLUDING, EROSION CONTROL MATTING OR SOD MATS ALONG CHANNEL BANKS. 7. FILL AND STABILIZE ABANDONED SEGMENTS OF THE EXISTING CHANNEL PER DIRECTION OF THE ENGINEER. LEGEND EXISTING CONTOUR MAJOR EXISTING CONTOUR MINOR PROPOSED CONTOUR MAJOR PROPOSED CONTOUR MINOR EXISTING STREAM EXISTING TOP OF BANK EXISTING BOTTOM OF BANK EXISTING OVERHEAD ELECTRIC UTILITY LINE PROPERTY LINE EXISTING DRAIN TILE EXISTING TREELINE EXISTING TREE 50 —46— (50) 42) — — — — BB — 99 — — — — a 1 — — OHE PROPOSED TOP OF BANK — PROPOSED CENTERLINE OF CHANNEL LIMITS OF PROPOSED CONSERVATION EASEMENT PROPOSED WETLAND PROPOSED CHANNEL PLUG (SEE DETAIL D3) BRUSH TOE PROTECTION (SEE DETAIL D3) HAY BALE TOE PROTECTION (SEE DETAIL D3) ENGINEERED SEDIMENT PACK (SEE DETAIL D2) LOG SILL (SEE DETAIL D4) RIFFLE GRADE CONTROL (SEE DETAIL D5) BRUSH BED SILL (SEE DETAIL D4) LOG STRUCTURE (PROFI LE) TB BB LC E y y -V jjjj A 0 0 0 0 1 000 ooo( 000000� o0 0 8 i 1 res 3600 Glenwood Ave, Suite 100 Raleigh, NC 27612 Main: 919.829.9909 www.res.us Engineering Services Provided By: Angler Environmental, LLC License: F-1428 SEAL REVISIONS: PLOT DATE: 10/2/2020 RELEASED FOR: PRELIMINARY - NOT FOR CONSTRUCTION PROJECT NAME: COWFORD MITIGATION SITE ONSLOW COUNTY DRAWING TITLE: NOTES PROJECT NUMBER: PROJECT MANAGER: DESIGNED: DRAWN: CHECKED: 0675 MB BRC SCF AFM SHEET NUMBER: I El FILE NAME:R:\Resgis\dropboxgis\projects\NC\Cowford\CAD\DWG\0675_SHT SITE.dwg SAVED BY: Sfasking \ 7 0 7 \\\ 7 0 1 � 7 — / 7 7 7 REACH KJ I -C 5 55 / -0 TB •TB \.y� - G2— 7 o 7 \ G� / 7 / \ EXISTING CULVERT CROSSING REACH KJ I -B DITCh B ( LCE /,- / fe r f _TB 1- 1' Ks; i N J r r v /// / / / / / cc /P/\ sztleft DITCh A ^o ‘„v:\ REACH KJ I -A , .. res 3600 Glenwood Ave, Suite 100 Raleigh, NC 27612 Main: 919.829.9909 www.res.us Engineering Services Provided By: Angler Environmental, LLC License: F-1428 SEAL 1"= 100 200 • ' • ,,•0017.4, • _. ..............J, it FULL SCALE: 0 100 2" = FULL SCALE REVISIONS: PLOT DATE: 10/2/2020 RELEASED FOR: PRELIMINARY - NOT FOR CONSTRUCTION PROJECT NAME: COWFORD MITIGATION SITE ONSLOW COUNTY DRAWING TITLE: EXISTING CONDITIONS PROJECT NUMBER: PROJECT MANAGER: DESIGNED: DRAWN: CHECKED: 0675 MB BRC SCF AFM SHEET NUMBER: .i E2 \. FILE NAME:R:\Resgis\dropboxgis\projects\NC\Cowford\CAD\DWG\0675_SHT_KJ1.dwg SAVED BY: Sfasking . EACI-1 KJ I -A STA I +57 TO STA I 0+65 EX. AT 15% SLO DE VARIES 5.0' 2% 2% TYPICAL CROSS SECTION REACH KJ I -A HEADWATER VALLEY RESTORATION STA I +42 TO I 0+65 80 75 70 G5 GO 0 I I I I I I I I I 1 1 1 EA O' .' TO' K EXISTING GRADE ALONG CENTERLINE STRI#AM I 12 I 3 0 "ED TOP •F BANK N i \ \ / \-CHANNEL TIE REACH KJ I INTO PROPOSED B�D EXISTING BED 1 1 1 1 1 1 1 1 1 1 I 1 I I + + + + + + SCALE: hOR I "=30'; VERT I "=3' + + + + + + 80 75 70 G5 GO / 1 res 3600 Glenwood Ave, Suite 100 Raleigh, NC 27612 Main: 919.829.9909 www. res . us Engineering Services Provided By: Angler Environmental, LLC License: F-1428 SEAL Q`� 1 "=30 60 FULL SCALE: 0 30 2" = FULL SCALE 1" = HALF SCALE REVISIONS: PLOT DATE: 10/2/2020 RELEASED FOR: PRELIMINARY - NOT FOR CONSTRUCTION PROJECT NAME: COWFORD MITIGATION SITE ONSLOW COUNTY DRAWING TITLE: REACH KJ 1 PROJECT NUMBER: PROJECT MANAGER: DESIGNED: DRAWN: CHECKED: 0675 MB BRC SCF AFM SHEET NUMBER: S 1 FILE NAME:R:\Resgis\dropboxgis\projects\NC\Cowford\CAD\DWG\0675_SHT_KJ1.dwg SAVED BY: Sfasking r -/LCE gr1 80 LC E 50 �Bs LC E LC E G8} 7+00-(G7) 7+50 REMOVE DRAIN TILE AND DISPOSE OF OFF -SITE IF CONTRACTOR FINDS FUNCTIONAL DRAIN TILE OUTSIDE OF EASEMENT, I NSTALT D R I NTTLE-6UTLET SEE DETAIL D3 LC E REACH KJ I -A HEADWATER VALLEY RESTORATION STA I +42 TO I 0+65 --8+50-- DRAIN DEPTH: 49" INSTALL DRAIN TILE OUTLET SEE SHEET D3 9 LC E Gb REMOVE DRAIN TILE AND DISPOSE OF OFF -SITE +00 9+50 \G- REMOVE DRAIN TILE AND DISPOSE OF OFF -SITE IF CONTRACTOR FINDS FUNCTIONAL DRAIN TILE OUTSIDE OF EASEMENT, INSTALL DRAIN TILE OUTLET SEE DETAIL D3 INSTALL DRAIN TILE OUTLET SEE SHEET D3 DRAIN DEPTH: 4 DRAIN DEPTH: 70" DRAIN DEPTH: 55" REACH KJ I -B RESTORATION STA I 0+65 TO 19+ 17 00 1 REMOVE DRAIN TILE AND DISPOSE OF OFF -SITE -0 2.1 2.2 2 3 2.4 2.5 _ EXISTING ALONG STREAM GRADE PROPOSED O= T BANK P CENTERLINE \ — ---- I — — \ \ \ / / — \ / \ — / \ \ / / \ \ 1 \ / \. - 1 _ -0.20% 1 � I I 1 / ,,,;, \`-__ - // \\ / / II 1 I I I I PROPOSED \_-- \ 11 1 1 1 1 1 I 1 I CHANNEL BED r 1 ) I 1 J 1 1 1 80 *-\,„" +OC . EACI-1 KJ I -A STA I +57 TO STA I 0+65 Ex. AT / 5% SLO DE VARIES 5.0' 2% 2% TYPICAL CROSS SECTION . EACI-1 KJ I -B STA I 0+65 TO STA 19+40 8.0' 3.0' I .0' BANKFULL STAGE TYPICAL RIFFLE CROSS SECTION 1 0.0' 5.0' I .0' BANKFULL STAGE TYPICAL RIGHT MEANDER CROSS SECTION 1 0.0' I .0' 5.0' BANKFULL STAGE TYPICAL LEFT MEANDER CROSS SECTION 75 70 65 60 SCALE: hOR I "=30'; VERT I "=3' 75 70 65 60 / 1 res 3600 Glenwood Ave, Suite 100 Raleigh, NC 27612 Main: 919.829.9909 www.res.us Engineering Services Provided By: Angler Environmental, LLC License: F-1428 SEAL 0 itio. 1 "=30 60 FULL SCALE: 30 2" = FULL SCALE 1" = HALF SCALE REVISIONS: PLOT DATE: 10/2/2020 RELEASED FOR: PRELIMINARY - NOT FOR CONSTRUCTION PROJECT NAME: COWFORD MITIGATION SITE ONSLOW COUNTY DRAWING TITLE: REACH KJ 1 PROJECT NUMBER: PROJECT MANAGER: DESIGNED: DRAWN: CHECKED: 0675 MB BRC SCF AFM SHEET NUMBER: S2 \ J FILE NAME:R:\Resgis\dropboxgis\projects\NC\Cowford\CAD\DWG\0675_SHT_KJ1.dwg SAVED BY: Sfasking r 7 r 2.4 7 1c1 / / / / /\ 1 2 + OOP i REACH KJ I -5 RESTORATION STA I 0+65 TO 19+ 17 ; / I I +50 / / / / / o '4+00 + I •�o!�f �.�j ��i� �+doh DRAIN DEPTH: 40" SWALE A TIE SWALE A TO REACH KJ I SEE SHEET S7 DRAIN DEPTH: 50" O + REMOVE DRAIN TILE AND rzDISPOSE OF OFF -SITE — IF CONTRACTOR FINDS FUNCTIONAL DRAIN TILE OUTSIDE OF EASEMENT, INSTALL DRAIN TILE OUTLET SEE DETAIL D3 DRAIN DEPTH: 47" REMOVE EXISTING PIPE AND DISPO OFF -SITE EXISTING CHANNEL TO BE ABANDONED AND BACKFILLED SEE SHEET D3 T�\ LEXISTING DITCH �/ TO BE ABANDONED \ AND BACKFILLED SEE SHEET D3 DRAIN DEPTH: 44" 7.I DRAIN DEPTH: 40" / 51ZE / DESC .) GU�VEIZT ENO W. $;3\J 18 1 . EACI-1 KJ I -B STA I 0+65 TO STA 19+40 O. 8.0' 3.0' I .0' BANKFULL STAGE TYPICAL RIFFLE CROSS SECTION 1 0.0' 5.0' 1.0' BANKFULL STAGE TYPICAL RIGHT MEANDER CROSS SECTION 1 0.0' Ir0' 5.0' BANKFULL STAGE TYPICAL LEFT MEANDER CROSS SECTION 75 70 65 GO 55 12 EXISTING GRADE _ PROPOSED TQP 3. 1 ALONG STREAM CENTERLINE OF BAND -- -0.20-%-- --- 7---- -0.2L1a — I I I I I II I PROPOSED 1) CHANNEL BED + + + + + + SCALE: HOR I "=30'; VERT I "=3' + + + + + + 75 70 65 GO 55 / 1 res 3600 Glenwood Ave, Suite 100 Raleigh, NC 27612 Main: 919.829.9909 www.res.us Engineering Services Provided By: Angler Environmental, LLC License: F-1428 SEAL 3 1 "=30 60 FULL SCALE: 0 30 2" = FULL SCALE 1" = HALF SCALE REVISIONS: PLOT DATE: 10/2/2020 RELEASED FOR: PRELIMINARY - NOT FOR CONSTRUCTION PROJECT NAME: COWFORD MITIGATION SITE ONSLOW COUNTY DRAWING TITLE: REACH KJ 1 PROJECT NUMBER: PROJECT MANAGER: DESIGNED: DRAWN: CHECKED: 0675 MB BRC SCF AFM SHEET NUMBER: S3 FILE NAME:R:\Resgis\dropboxgis\projects\NC\Cowford\CAD\DWG\0675_SHT_KJ1.dwg SAVED BY: Sfasking r l Td 7/ l / /0 7.1 Th� REACH KJ I -5 RESTORATION n STA I 0+65 TO 19+ 17 rn EXISTING CHANNEL TO BE ABANDONED AND BACKFILLED SEE SKEET D3 LCE LCE REMOVE DRAIN,E AND DISPOSE OF OFF -SITE IF CONT TOR FINDS FUNCTIONAL DRAT LE OUTSIDE OF EASEMENT, INSTALL DRAIN TILE OUTLET E DETAIL D3 PROPOSED 64 LF OF 30" RCP INV. IN: 61.39' INV. OUT: 6 I . (PIPE BURRjl 0.4') LCE REACH KJ I -C RESTORATION STA 19+85 TO 35+57 \ 2 \GS c Gc 237 SCE J / -- g — �� ------ 25+00= `� 70 65 60 55 50 18 I I 4. I 4.2 I PROPSED TOP 4.3 I I OF B NK 4.5 4.6 _14.41_ 4.7 —I— _ _ EXISTING GRADE _ _ _ ALONG STREAM -0.4 I % t I —1 _ i 1 — — \ _ _ CENTERLINE I 1 J / 1 1 I I I -03 . I % I \ I r\ \ \/ 1 \ I ��, I \ I -�.22% \ / I 1 o0L, / / / \ 1 1\ II I J \ I ° °o°o ° \ I / -0 30% n i l/ I PROPOEI \ / \ I \ \ I I 0.30% I 2 @ 30 \ I \ \ I I IR�P I I I \ I \ I 1 , \ / I 1 \ \ I , \,I I I 1 , �� \� `\ I I I / II 1 / \ I I \ /\ / I,^__� / \I 11 I 11 / \\ j I / \\ 1 // j �I I I/'� I I \ I I / I / / \ 1 / CONSERVATION co— 1 \III \ / 1 / \\ I m EASEMENT BZEAK m PROPOSED CHANNEL BED 11 \/I i Q Q I +00 18+50 19+00 19+50 20+00 20+50 2 I +00 2 I +50 22+00 22+50 23+00 23+50 24+' SCALE: HOR I "=30'; VERT I "=3' 70 65 60 55 50 0 . EACI-1 KJ I -B STA I 0+65 TO STA 19+40 . EAC I-1 KJ I -C STA 19 + 70 TO STA 3 5 + 5 7 8.0' 3.0' 1 .0' BAN KFULL STAGE TYPICAL RIFFLE CROSS SECTION 10.0' 5.0' BAN KFULL STAGE 1 .0' TYPICAL RIGHT MEANDER CROSS SECTION 10.0' 1 .0' 5.0' BAN KFULL STAGE TYPICAL LEFT MEANDER CROSS SECTION / 1 res 3600 Glenwood Ave, Suite 100 Raleigh, NC 27612 Main: 919.829.9909 www.res.us Engineering Services Provided By: Angler Environmental, LLC License: F-1428 SEAL it. 1 "=30 60 FULL SCALE: 0 30 2" = FULL SCALE 1" = HALF SCALE REVISIONS: PLOT DATE: 10/2/2020 RELEASED FOR: PRELIMINARY - NOT FOR CONSTRUCTION PROJECT NAME: COWFORD MITIGATION SITE ONSLOW COUNTY DRAWING TITLE: REACH KJ 1 PROJECT NUMBER: PROJECT MANAGER: DESIGNED: DRAWN: CHECKED: 0675 MB BRC SCF AFM SHEET NUMBER: S4 \ J FILE NAME:R:\Resgis\dropboxgis\projects\NC\Cowford\CAD\DWG\0675_SHT_KJ1.dwg SAVED BY: Sfasking r / J —66 -65 / LCE / / J / / / / / / / 0- / / / 0 / 7 z LCE ;31 7 i / / / \O- TREATMENT POQ / REACH KJ I -C RESTORATION / STA 19+85 TO 35+57 / \ / / \ ;31 \6, \ V \\ / .A\ V, 1\'`T SWALE B I INSTALL ENGINEERED\ �CF SEDIMENT PACK SEE SKEET D2 TIE SWALE B INTO\ REACH KJ I -B SEE SKEET 58 / N GI Lc x �\ 3 1 +00,__ 70 G5 GO 55 50 24 5.I- 5.2 1 I EXIST NG GRAD -if PR POSED TOP 5.3 5.4 ALONG STREAM OF BANS 1 CENTERLINE --- �— � -0.30% __ ---- ��—` - — \ 1 I ( I U.30% I /T 1 - -0.3 % 1 / I I / \ 1/I/\ / , \ I 1/\ \\ I I \^ \\ / / I \ / \ / \/ / I I I/ I I 1 I` / I 1 / I `I I\ 1 1 / I I PROPOSED l 4 1\/ J/ \/ I 1 1 \ 1 I I / I I ChANNELBED ✓ I 1 +00 24+50 I 1 25+00 25+50 26+00 26+50 27+00 1 1 27+50 I 1 1 28+00 1 28+50 29+00 29+50 30+ SCALE: hOR I "=30'; VERT I "=3' 70 G5 GO 55 50 0 . EAC I-1 KJ I -C STA 19 + 70 TO STA 3 5 + 5 7 0 8.0' 3.0' I .0' BANKFULL STAGE TYPICAL RIFFLE CROSS SECTION 1 0.0' 5.0' I .0' BANKFULL STAGE TYPICAL RIGHT MEANDER CROSS SECTION 1 0.0' I .0' 5.0' BANKFULL STAGE TYPICAL LEFT MEANDER CROSS SECTION / 1 res 3600 Glenwood Ave, Suite 100 Raleigh, NC 27612 Main: 919.829.9909 www.res.us Engineering Services Provided By: Angler Environmental, LLC License: F-1428 SEAL 4. 1 "=30 60 FULL SCALE: 0 30 2" = FULL SCALE 1" = HALF SCALE REVISIONS: PLOT DATE: 10/2/2020 RELEASED FOR: PRELIMINARY - NOT FOR CONSTRUCTION PROJECT NAME: COWFORD MITIGATION SITE ONSLOW COUNTY DRAWING TITLE: REACH KJ 1 PROJECT NUMBER: PROJECT MANAGER: DESIGNED: DRAWN: CHECKED: 0675 MB BRC SCF AFM SHEET NUMBER: S5 \ J FILE NAME:R:\Resgis\dropboxgis\projects\NC\Cowford\CAD\DWG\0675_SHT_KJ1.dwg SAVED BY: Sfasking r� REACH KJ I -C RES�QRATI 0 N 19+85 TO 35 5� GO - 55 50 45 EXISTING GRADE ALONG STREAM CENTERLINE \ 0 / \ \r �/ / / ----7\< / 1 1 1 / 6.1 / \\ Ch 6.2 PROPOSiD ANNEL B D / -\ \ -0.30% \ \ \ \ 6.3 6.4 -0.30%/ \ ■ / / I \ / / 1 / 1 40 - 1 EXISTING TOP OF BANK _ TIE REACH KJ I INTO fXISTING BED 1 EASEMENT r / 1 EXISTING 48" CMP II I I I I I II 1 /// ' GO 30+00 30+50 3 1 +00 3 I +50 32+00 32+50 33+00 33+50 34+00 SCALE: HOR I "=30'; VERT I "=3' 34+50 3 5 +00 35+50 3G+00 55 50 45 40 36+50 36+75 . EAC I-1 KJ I -C STA 19 + 70 TO STA 3 5 + 5 7 0 8.0' 3.0' I .0' BANKFULL STAGE 41 4_ TYPICAL RIFFLE CROSS SECTION 1 0.0' 5.0' BANKFULL STAGE „I...0' 4_ TYPICAL RIGHT MEANDER CROSS SECTION 1 0.0' I .0' 5.0' BANKFULL STAGE U I 4_ TYPICAL LEFT MEANDER CROSS SECTION / 1 res 3600 Glenwood Ave, Suite 100 Raleigh, NC 27612 Main: 919.829.9909 www.res.us Engineering Services Provided By: Angler Environmental, LLC License: F-1428 SEAL G FULL SCALE: 1 "=30 0 30 60 2" = FULL SCALE 1" = HALF SCALE REVISIONS: PLOT DATE: 10/2/2020 RELEASED FOR: PRELIMINARY - NOT FOR CONSTRUCTION PROJECT NAME: COWFORD MITIGATION SITE ONSLOW COUNTY DRAWING TITLE: REACH KJ 1 PROJECT NUMBER: PROJECT MANAGER: DESIGNED: DRAWN: CHECKED: 0675 MB BRC SCF AFM SHEET NUMBER: S6 \ J FILE NAME:R:\Resgis\dropboxgis\projects\NC\Cowford\CAD\DWG\0675_SHT_ DITCH_ A.dwg SAVED BY: Sfasking r 1 / \ / 1 r J A. 00 �/ 2 �%/ // \ 0 \k)-�/ /� (/\ / / A ) it PROPOSED 4 LF 0 36" RCP INV. 64.4b� INV. OUT: 64.38' Akj / LCE EXISTING CULVERT TO BE REMOVED\ ND DISPOSED OF OFF -SINE \G REMOVE DRAIN TILE AND DISPOSE OF OFF -SITE IF CONTRACTOR FI IDS FUNCTIONAL DRAIN TILE OUFIDE OfASEMENT, IN(ALL DRAIN TILE'BUTLET SEE 41. TREATMENT POOL DRAIN TILE: 63.55' 24" CPP N.W. INV: 60.49' 5.E. INV: G2.84' \ LC 1 REMOVE DRAIN TILE AND DISIOSE OF OFF -SITE \_1F CONTRACTORINDS FUNCTIONAL TILE-0-SIDE OF EASEMENT, SO INSTALL DRAIN TILE OUTLET SEE DETAIL D3 \ �7 + 00 REACH KJ I -5 EXISTING DITCH TO BE ABANDONED AND BACKFILLED SEE SHEET D3 7.1 8 o0 ( 80 75 70 65 60 2 I I I I I I I I 1 1 1 I I I I 1 )NSERVATION EASEMENT (STA 3+73) 7.1 EXISTING `rOP EX STING ALONG GRADE SWALE OF BANK CENTERLINE _------ ------__ __--- ------ -,, �� T PROPOSED P OF BAINIK // ----- _ -0.02% -O. 2% / -_ PROPOSED 3G" TIE SWALE A INTO EXISTING BED RCP PROPOSE CHANNEL BE _ TIE WAL PROPOSE A INTO BED OF REA h KJ I -B 1 1 11 SCALE: HOR I "=30'; VERT I "=3' 80 75 70 65 60 SWALE A STA 5+ 17 TO STA 7 + 9 6 VARIES I .0' TYPICAL CROSS SECTION / 1 res 3600 Glenwood Ave, Suite 100 Raleigh, NC 27612 Main: 919.829.9909 www.res.us Engineering Services Provided By: Angler Environmental, LLC License: F-1428 SEAL (4,,, 1 "=30 60 FULL SCALE: 0 30 2" = FULL SCALE 1" = HALF SCALE REVISIONS: PLOT DATE: 10/2/2020 RELEASED FOR: PRELIMINARY - NOT FOR CONSTRUCTION PROJECT NAME: COWFORD MITIGATION SITE ONSLOW COUNTY DRAWING TITLE: SWALE A PROJECT NUMBER: PROJECT MANAGER: DESIGNED: DRAWN: CHECKED: 0675 MB BRC SCF AFM SHEET NUMBER: S7 FILE NAME:R:\Resgis\dropboxgis\projects\NC\Cowford\CAD\DWG\0675_SHT_DITCH_B.dwg SAVED BY: Sfasking r 7 / / / / / / / / / co / / / / 7 7 / / 7 / / / / / 7 / / / / /6/ I I c / / _0+50 I +00 —TB=-- \ TB / v / 1 +50— — 2+00 / INS ALL ENGINEERED DIMENT PACK SE DETAIL D2 REAC\ JI-C /// 61/ 0 V' TREATMENT POOL) \ / / / 7 / / cc 67/ 70 65 GO 55 50 0 _ PROPOSED TOP OF BANK EXISTING TOP OF BANK 8. 1 —I ' _—sue --'\\ \ _ \ \ \ ---- / ----- -1 ,-7 - .1-A \ \ 1 / \ \ 1 I EXISTING GRADE / \ ALONG CENTERLINE SWALE I ` \ \I K \\ PROPOSED CHANNEL BED _ TIE SWALE B IN 0 PROPOSED REACH BED KJ I F C I SCALE: hOR I "=30'; VERT I "=3' 70 65 GO 55 50 / 1 res 3600 Glenwood Ave, Suite 100 Raleigh, NC 27612 Main: 919.829.9909 www.res.us Engineering Services Provided By: Angler Environmental, LLC License: F-1428 SEAL ( Ill 4110 lila fits 1 "=30 /1 60 FULL SCALE: 0 30 2" = FULL SCALE 1" = HALF SCALE REVISIONS: PLOT DATE: 10/2/2020 RELEASED FOR: PRELIMINARY - NOT FOR CONSTRUCTION PROJECT NAME: COWFORD MITIGATION SITE ONSLOW COUNTY DRAWING TITLE: SWALE B PROJECT NUMBER: PROJECT MANAGER: DESIGNED: DRAWN: CHECKED: 0675 MB BRC SCF AFM SHEET NUMBER: S8 FILE NAME:R:\Resgis\dropboxgis\projects\NC\Cowford\CAD\DWG\0675_SHT SITE.dwg SAVED BY: Sfasking LEGEND LIMITS OF CONSERVATION EASEMENT PROPOSED TOP OF BANK — PROPOSED WETLAND (TOTAL AREA: 2.99 I AC) PROPOSED FLOODPLAI N DEPRESSION (SEE SHEET D4) LCE \fr \fr NOTE: / I . REMOVE ALL DRAIN TILES/ITHIN THE EASEMENT AND DIS(OSE OF OFF -SITE 2. IF CONTRACTOR FINDS FUNCTIONFY>—BR hTILE BEYOND S.LI�VEYFD LIMITS \ CONTRACTOR IS RES IkISIF3LOR REMOVING DRAINTILE FROM E SMENT AND INSTALLING PyDRAIN TILE OUTLET (SDI SHEET D3) IN REACH KJ I -C / / L p EXISTING CHANNEL TO BE ABANDONED AND BACKFI LLED SEE SKEET D3 — TB 64 / o '</ z"/://) . co / / / Co /r �cF \► c r \/ N i/ LCE s I 6\ y y y y y i INSTALL DRAIN TILE OUTLET SEE SKEET D3 Jr y y y LCE y 99 —Tay_ l�� y y y y y ,v y y y y y- // y \ \y y y-, y y y Jr y Jr y y y r y y y y Jr CE y y y y y y _—— y 91 �L) ---_ 91 Jr y �5 y y y y y \ \ ,v / l y y y 7- �J� EXISTING DITCH TO BE TABANDONED AND � BACKFILLED SEE S1EET D3 y j y y y y y y \y \ y y y / y \ \ y �y �C -10 gal y y may— — y y i y -y gal y REACH KJ I -B REACH KJ I -A 9 INSTALL DRAIN TILE OUTLET C)C / �,��' / SEE SKEET D3 /� / / %Q // / /// / // / /// 7 /'/'may i /%/// / i/ `'''/ /, /y / //// / /// iz/' / .o7 V �0 / // ,,y7 CONSTRUCT FLOODPLAIN DEPRESSIONS SEE SKEET D4 WETLAND WA RE-ESTABLIShIV ENT 2.99 ',ACRES />76 / / 1 INSTALL DRAIN TILE OUTLET SEE SHEET D3 DITCH A / , .. res 3600 Glenwood Ave, Suite 100 Raleigh, NC 27612 Main: 919.829.9909 www.res.us Engineering Services Provided By: Angler Environmental, LLC License: F-1428 SEAL 0 Alt 1"=50 100 FULL SCALE: 50 2" = FULL SCALE REVISIONS: PLOT DATE: 10/2/2020 RELEASED FOR: PRELIMINARY - NOT FOR CONSTRUCTION PROJECT NAME: COWFORD MITIGATION SITE ONSLOW COUNTY DRAWING TITLE: WETLAND PLAN PROJECT NUMBER: PROJECT MANAGER: DESIGNED: DRAWN: CHECKED: 0675 MB BRC SCF AFM SHEET NUMBER: FILE NAME:R:\Resgis\dropboxgis\projects\NC\Cowford\CAD\DWG\0675_SHT SITE.dwg SAVED BY: Sfasking PLANTING LEGEND LCE LIMITS OF CONSERVATION EASEMENT EXISTING TREELINE PROPERTY LINE RIPARIAN PLANTING (TOTAL AREA: 16.35 AC) LIVE STAKE RIPARIAN SEED ONLY PLANTING (TOTAL AREA: 0.44 AC) / rYYY YYY1 / / / / / / / / / / / RAC h KJ I -C / / / / / \ \ / 40,404***40.****i******, 444,44****‘"11 to. 144# <( At kap**0" ' ******, I r 4***4*,4*Ifirfrb- 4Ft* • • 1 4 gi * it 14 g *4. ertels pill -11*/****, 7 4-4:.1********spg*********,P , 44.04******* ' 4*****.b*- \ 4"*.e.itik******1**********gVe / )E, , j r . .7 144,1440/ Oa *WOO" P i 8 - - - - - 'WW1 -If,* *Orr* 01440 iir #14111** \ 7 - - - - - - - - \ ,-69-- 10104440.4tb" : tlit" 4 ** ** ** **fr P ** 4* *ICIP V** 40 r* *ia au . I ** e ' - * -4 6**& * * * ' 4** ' 44.4410-Z4147 ki 44,44r P o 44040**AllitiP4:41144414#40****4 ' ****** 4 4 041****14te*, ; 4:f"fW"t74dtOOA*** Igit volobotore404 4•04************** f ( vklietio4„.ipitor.044-rboata_ibm.._Ara._ h..*AkkAp...b..0- I t N1.4riele4fir 4""tV 447 — _ toi4Vi- 4tVfre N-f* 444tfr 4 ' ) . , ( - f1.41 4" Vir /e /*91--- \ k \ / r '♦♦♦♦♦♦* 4 DITCh B REACH KJ I -A r PLANTING TABLE � — :fir \ —;- `f \ REACH KJ I -B Permanent Riparian Seed Mix Common Name Scientific Name Percent Composition Virginia Wildrye Elymus virginicus 27% Partridge Pea Chamaecrista fasciculata 20% Beaked Panicgrass Panicum anceps 15% Autumn Bentgrass Agrostis perennans 10% Redtop Panicgrass Panicum rigidulum 1 0% Lurid Sedge Carex lurida 7% New York I ronweed Vernonia noveboracensis 3% Deertongue Dichanthelium clandestinum 3% Soft Rush Juncus effusus 3% Common Sneezeweed Ilelenium autumnale I % Crimsoneyed Rosemallow I-libiscus moscheutos I % Live Staking and Live Cuttings Bundle Tree Species Common Name Scientific Name Percent Composition Black willow Salix nigra 40% Silky dogwood Cornus ammomum 30% Cottonwood Populus deltoides 30% Bare Root Planting Tree Species Common Name Scientific Name Percent Composition River birch Betula nigra 1 5% Bald cypress Taxodium distichum 1 0% Water oak Quercus nigra 1 0% Willow oak Quercus phellos 1 0% Overcup oak Quercus lyrata 1 0% Swamp tupelo Nyssa biflora 1 0% American Sycamore Plantanus occidental's 1 0% Southern Red Oak Quercus falcata I 0% Buttonbush Cephalanthus occidental's 1 0% Green Ash Fraxmus pennsylyanica 5% DITCh A PLANTING NOTES ALL PLANTING AREAS 1' . EROSION CONTROL MEASURES SHALL BE PROPERLY MAINTAINED UNTIL PERMANENT VEGETATION IS ESTABLISHED AND FINAL APPROVAL HAS BEEN ISSUED. THE CONTRACTOR SHALL INSPECT EROSION CONTROL MEASURES AT THE END OF EACH WORKING DAY TO ENSURE MEASURES ARE FUNCTIONING PROPERLY. 2. DISTURBED AREAS NOT AT FINAL GRADE SHALL BE TEMPORARILY VEGETATED WITHIN I 0 WORKING DAYS. UPON COMPLETION OF FINAL GRADING, PERMANENT VEGETATION SHALL BE ESTABLISHED FOR ALL DISTURBED AREAS WITHIN I 0 WORKING DAYS. SEEDING SHALL BE IN ACCORDANCE WITH EROSION CONTROL PLAN. 3. ALL DISTURBED AREAS SHALL BE PREPARED PRIOR TO PLANTING BY DISC OR SPRING -TOOTH CHISEL PLOW TO MINIMUM DEPTH OF 12 INCHES. MULTIPLE PASSES SHALL BE MADE ACROSS PLANTING AREAS WITH THE IMPLEMENT AND THE FINAL PASS SHALL FOLLOW TOPOGRAPHIC CONTOURS. 4. BARE ROOT AND LIVE STAKE TREE SPECIES SHALL FOLLOW THE COMPOSITION SHOWN IN THE TABLE TO THE LEFT. SPECIES MAY BE SUBSTITUTED BASED ON AVAILABILITY. 5. BARE ROOT AND LIVE STAKE TREE SPECIES SHALL BE PLANTED ACCORDING TO THEIR RESPECTIVE DETAILS. G. BARE ROOT PLANTING DENSITY IS APPROXIMATELY 800 STEMS PER ACRE. SPECIES SHALL BE DISTRIBUTED SUCH THAT 3 TOG PLANTS OF THE SAME SPECIES ARE GROUPED TOGETHER. 7. TREATMENT/REMOVAL OF INVASIVE SPECIES, PINES AND SWEET GUMS LESS THAN G" DBH SHALL BE PERFORMED THROUGHOUT THE PLANTED AREA. 8. TEMPORARY SEED MIX SHALL BE APPLIED AT A RATE OF 150 LBS/ACRE TO ALL DISTURBED AREAS WITH SLOPES EQUAL TO OR STEEPER THAN 3: I . 9. PERMANENT RIPARIAN SEED MIX SHALL BE APPLIED TO ALL DISTURBED AREAS WITHIN THE CONSERVATION EASEMENT AT A RATE OF 15 LBS/ACRE. res 3600 Glenwood Ave, Suite 100 Raleigh, NC 27612 Main: 919.829.9909 www.res.us Engineering Services Provided By: Angler Environmental, LLC License: F-1428 SEAL 0 it FULL SCALE: 1"= 100 200 100 2" = FULL SCALE REVISIONS: PLOT DATE: 10/2/2020 RELEASED FOR: PRELIMINARY - NOT FOR CONSTRUCTION PROJECT NAME: COWFORD MITIGATION SITE ONSLOW COUNTY DRAWING TITLE: PLANTING PLAN PROJECT NUMBER: PROJECT MANAGER: DESIGNED: DRAWN: CHECKED: 0675 MB BRC SCF AFM SHEET NUMBER: .. P 1 .i FILE NAME:R:\Resgis\dropboxgis\projects\NC\Cowford\CAD\DWG\0675_SHT_DETAILS.dwg SAVED BY: Sfasking WHEN AND WHERE TO USE IT SILT FENCE IS APPLICABLE IN AREAS: WHERE TI1E MAXIMUM SHEET OR OVERLAND FLOW PATI1 LENGTH TO TI1E FENCE IS 100-FEET. WHERE TI1E MAXIMUM SLOPE STEEPNESS (NORMAL [PERPENDICULAR] TO FENCE LINE) IS 211: 1 V. 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: I . USE A SYNTHETIC FILTER FABRIC OF AT LEAST 95% BY WEIGHT OF POLYOLEFINS OR POLYESTER, WHICH 1S CERTIFIED BY THE MANUFACTURER OR SUPPLIER AS CONFORMING TO THE REQUIREMENTS IN ASTM D 646 1 . SYNTHETIC FILTER FABRIC SHOULD CONTAIN ULTRAVIOLET RAY INHIBITORS AND STABILIZERS TO PROVIDE A MINIMUM OF 6 MONTHS OF EXPECTED USABLE CONSTRUCTION LIFE AT A TEMPERATURE RANGE OF 0° TO 1 20° F. 2. ENSURE THAT POSTS FOR SEDIMENT FENCES ARE I .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: I . 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 GROUND SURFACE. (HIGHER FENCES MAY IMPOUND VOLUMES OF WATER SUFFICIENT TO CAUSE FAILURE OF THE STRUCTURE.) 3. CONSTRUCT THE FILTER FABRIC FROM A CONTINUOUS ROLL CUT TO THE LENGTH OF THE BARRIER TO AVOID JOINTS. WHEN JOINTS ARE NECESSARY, SECURELY FASTEN THE FILTER CLOTH ONLY AT A SUPPORT POST WITH 4 FEET 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 MINIMUM 50 POUND TENSILE STRENGTH. 5. EXCAVATE A TRENCH APPROXIMATELY 4 INCHES WIDE AND 8 INCHES DEEP ALONG THE PROPOSED LINE OF POSTS 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 COMPACTION OF THE BACKFILL IS CRITICAL TO SILT FENCE PERFORMANCE. 8. DO NOT ATTACH FILTER FABRIC TO EXISTING TREES. MAI NTENANCE: I . INSPECT SEDIMENT FENCES AT LEAST ONCE A WEEK AND AFTER EACH RAINFALL. MAKE ANY REQUIRED REPAIRS IMMEDIATELY. 2. SHOULD THE FABRIC OF A SEDIMENT FENCE COLLAPSE, TEAR, DECOMPOSE OR BECOME INEFFECTIVE, REPLACE IT PROMPTLY. 3. REMOVE SEDIMENT DEPOSITS AS NECESSARY TO PROVIDE ADEQUATE STORAGE VOLUME FOR THE NEXT RAIN AND TO REDUCE PRESSURE ON THE FENCE. TAKE CARE TO AVOID UNDERMINING THE FENCE DURING CLEANOUT. 4. REMOVE ALL FENCING MATERIALS AND UNSTABLE SEDIMENT DEPOSITS AND BRING THE AREA TO GRADE AND STABILIZE IT AFTER THE CONTRIBUTING DRAINAGE AREA HAS BEEN PROPERLY STABILIZED. I .25 LB./LINEAR FT. STEEL POSTS FILTER FABRIC COMPACTED EARTH co FILTER FABRIC EXTRA STRENGTH FILTER FABRIC BACKFILL TRENCH WITH COMPACTED EARTH USE EITHER FLAT -BOTTOM OR V-BOTTOM TRENCH SHOWN BELOW RUNOFF FLAT -BOTTOM TRENCH DETAIL z Rt �le'P/C HEAVY DUTY PLASTIC TIE FOR STEEL POSTS BURY FABRIC SILT FENCE INSTALLATION FILTER FABRIC COMPACTED EARTH RUNOFF co N 0 z_ N FILTER FABRIC V-SHAPED TRENCH DETAIL TEMPORARY 5ILT FENCE NTS FLOW r*** pill******************WRI*********** I A MAI NTENANCE: PLAN VIEW SEE NOTE LOWEST POINT SECTION A -A I . PERIODICALLY INSPECT SANDBAG DIKE FOR DAMAGE AND LEAKS AND REPAIR AS NEEDED 2. REMOVE IMPOUNDED TRASH AND SEDIMENT A MIDDLE LAYER BOTTOM LAYER ENDS OF BAGS IN ADJACENT ROWS BUTTED SLIGHTLY TOGETHER GROUND LEVEL EARTH SURFACE TOP LAYER EARTH SURFACE SECTION B-B NOTES: TRENCH 0.25' DEEP ONLY WHEN PLACED ON EARTH SURFACE I . END OF DIKE AT GROUND LEVEL TO BE HIGHER THAN THE LOWEST POINT OF FLOW CHECK 2. SUFFICIENT SANDBAGS ARE TO BE PLACED TO PREVENT SCOURING 3. SANDBAG BARRIERS SHALL BE CONSTRUCTED OF THREE LAYERS OF SANDBAGS. THE BOTTOM LAYER SHALL CONSIST OF 3 ROWS OF BAGS, THE MIDDLE LAYER SHALL CONSIST OF 2 ROWS OF BAGS AND THE TOP LAYER SHALL CONSIST OF I ROW OF BAGS 4. THE RECOMMENDED DIMENSION OF A FILLED SANDBAG SHALL BE APPROXIMATELY 0.5 FT X 0.5 FT X I .5 FT SANDBAG IMPEVIOU5 DIKE NTS WIRE FENCING (IF APPLICABLE) WOVEN FILTER FABRIC GENERAL NOTES: 4' MAX. 111E111=I 1=1.. =111E111E111E111E111E111E111E111E111E111E111E111E111E111=1. I I I -I I I -I I I-III-III-III-III-III-III-III-III-III-III-III-III-I -111E111E111E111E111E111E111E111E111E111E111EI I I=III=III=111- I -III-III I�I11111111111-1"- 111E1�111j1�1=III-1�1=1�1 j11�1 1�1- 1 . SEDIMENT FILTER OUTLET AND HARDWARE CLOTH SHALL BE 1 G INCHES HIGH BUT NO TALLER THAN 18INCHES. 2. HARDWARE CLOTH SHALL BE ANCHORED TO THE STEEL POSTS SECURELY USING APPROPRIATE ANCHORS. HARDWARE CLOTH SHALL BE KEYED IN A MINIMUM OF 12 INCHES IN LENGTH AND BACKFILLED PROPERLY AS SHOWN IN ABOVE DETAIL. HARDWARE CLOTH TO BE SAME AS STD. #30.09 (1 9 GAUGE, 1/4" SPACING). 3. POSTS SHALL BE NO MORE THAN 4 FEET APART. 4. SITE OUTLETS AT ANY POINT SMALL CONCENTRATED FLOWS ARE ANTICIPATED AND AT THE DIRECTION OF ThE INSPECTOR. 5. ONE ACRE MAXIMUM DRAINAGE AREA PER OUTLET. 5ILT FENCE OUTLET NTS 11-III= kd MAINTENANCE NOTES: STEEL POST HARDWARE CLOTH WASHED STONE (NCDOT #5 OR #57) FLOW I I 1=1 I I=111111 111 - ANCHOR SKIRT; EXCAVATE TRENCH AND COMPACT BACKFILL 1. FILTER OUTLETS SHALL BE INSPECTED BYThE FINANCIALLY RESPONSIBLE PARTY OR hIS AGENT IMMEDIATELY AFTER EACh RAINFALL AND AT LEAST DAILY DURING PROLONGED RAINFALL. ANY REPAIRS NEEDED SHALL BE MADE IMMEDIATELY. 2. THE STONE SHALL BE REPLACED PROMPTLY AFTER ANY EVENT THAT HAS CLOGGED OR REMOVED IT. 3. SEDIMENT DEPOSITS SHOULD BE REMOVED WHEN DEPOSITS REACH HALF ThE HEIGHT OF THE BARRIER. ANY SEDIMENT DEPOSITS REMAINING IN PLACE AFTERThE SILT FENCE OUTLET IS REMOVED SHALL BE DRESSED TO CONFORM TO THE EXISTING GRADE, PREPARED AND SEEDED. INSTALLATION NOTES: SITE PREPARATION I . GRADE AND COMPACT AREA. 2. REMOVE ALL ROCKS, CLODS, VEGETATION, AND OBSTRUCTIONS SO THAT MATTING WILL HAVE 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 THE ENGINEER. APPLY ANY TREATMENT SUCH AS LIME OR FERTILIZERS TO THE SOIL IF NEEDED. SEEDING I . SEE PLANTING SHEETS FOR SEEDING REQUIREMENTS. 2. APPLY SEED TO SOIL BEFORE PLACING MATTING. INSTALLATION - STREAM BANK I . SEE GRADING NOTES ON PLAN AND PROFILE SHEETS AND DETAIL SHEETS FOR INFORMATION REGARDING WHAT AREAS ARE TO RECEIVE COIR MATTING. 2. OVERLAP ADJACENT MATS 6" (IN DIRECTION PARALLEL TO FLOW) AND ANCHOR EVERY 12" ACROSS THE OVERLAP. THE UPSTREAM MAT SHOULD BE PLACED OVER THE DOWNSTREAM MAT. 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. 6. 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, BACKFILL ANCHOR TRENCH, AND COMPACT SOIL. 8. STAKE AT 12" INTERVALS ALONG OVERLAP. 9. IF MORE THAN ROLL IS REQUIRED TO COVER THE CHANNEL FROM THE TOP OF BANK DOWN TO THE TOE, THEN OVERLAP MATTING BY A MINIMUM OF I'. INSTALLATION - HEADWATER VALLEY I . SEE GRADING NOTES ON PLAN AND PROFILE SHEETS AND DETAIL SHEETS FOR INFORMATION REGARDING WHAT AREAS ARE TO RECEIVE COIR MATTING. 2. OVERLAP ADJACENT MATS 6" (IN DIRECTION PARALLEL TO FLOW) AND ANCHOR EVERY 12" ACROSS THE OVERLAP. THE UPSTREAM MAT SHOULD BE PLACED OVER THE DOWNSTREAM MAT. 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. 6. EXTEND MAT A MINIMUM OF I FOOT PAST TOE OF SLOPE. 7. STAKE AT 12" INTERVALS ALONG OVERLAP. 8. IF MORE THAN ROLL IS REQUIRED TO COVER THE VALLEY BOTTOM, THEN OVERLAP MATTING BY A MINIMUM OF I' IN THE CENTER OF THE CHANNEL. • • • • • • • • • • • COI MATTING KEY -IN MATTING STAKE MATTING JUST ABOVE CHANNEL TOE AND BACKFILL W/ RIFFLE MATERIAL STREAM / SWALE MATTING I.0' MIN. I.0' MIN NTS HEADWATER VALLEY MATTING EROSION CONTROL MATTING MUST MEET REACH KJ I -B $ C • 100 To COCONUT FIBER (COIR) TWINE WOVEN INTO A HIGH 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 : OR EXCEED THE FOLLOWING REQUIREMENTS: REACH KJ I -A / SWALE A $ B • 100 To WOOD FIBER • THICKNESS - 0.382 IN. MINIMUM. • SHEAR STRESS - 1 .6 LBS/SQFT • FLOW VELOCITY- OBSERVED 5 FT/SEC • WEIGHT - 8.8 OZ/SY • SLOPES - UP TO A MAXIMUM OF 2: I COARSE AGGREGATE - STONE SIZE = 2"-3" INSTALL PIPE PER DESIGN (IF NEEDED) PURPOSE: z STABILIZED CONSTRUCTION ENTRANCES SHOULD BE USED AT ALL POINTS WHERE TRAFFIC WILL BE LEAVING A CONSTRUCTION SITE AND MOVING DIRECTLY ONTO A PUBLIC ROAD. INSTALL A CULVERT PIPE ACROSS THE ENTRANCE WHEN NEEDED TO PROVIDE POSITIVE DRAINAGE. CONSTRUCTION SPECIFICATIONS: I . CLEAR THE ENTRANCE AND EXIT AREA OF ALL VEGETATION, ROOTS, AND OTHER OBJECTIONABLE MATERIAL AND PROPERLY 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 TO SEEPAGE OR HH W IGATER TABLE. MAI NTENANCE: I . 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. 2. AFTER EACH RAINFALL, INSPECT ANY STRUCTURE USED TO TRAP SEDIMENT AND CLEAN IT OUT AS NECESSARY. 3. IMMEDIATELY REMOVE ALL OBJECTIONABLE MATERIALS SPILLED, WASHED, OR TRACKED ONTO PUBLIC ROADWAYS, OR AIRFIELD PAVEMENTS. TEMPORARY GRAVEL CON5TUCTION ENTRANCE NTS NOTES: I . CONSTRUCT DAM ACCORDING TO NCDENR EROSION CONTROL MANUAL 2. RIPRAP SHALL BE CLASS I 3. PLACE ROCK DAM AS SHOWN ON PLANS. EXTEND CLASS'S RIP RAP ROCK APRON 2 FEET DOWNSTREAM FROM TOE OF ROCK DAM MAINTENANCE: I . INSPECT CHECK DAM PERIODICALLY AND AFTER EACH SIGNIFICANT RAINFALL EVENT FOR DAMAGE AND SEDIMENT ACCUMULATION 2. AT A MINIMUM, REMOVE SEDIMENT WHEN ACCUMULATIONS REACH ONE-HALF THE HEIGHT OF THE SEDIMENT CONTROL STONE 3. REPLACE OR CLEAN SEDIMENT CONTROL STONE AS NEEDED TO ALLOW WATER TO DRAIN THROUGH THE DEVICE BETWEEN RAINFALL EVENTS SPILLWAY CREST CLASS'S RIP RAP I.0' B ROCK APRON 2' MIN. THICK CLASS .0or•or•or•or•-`ip. '••zzzzz. NItalte CUTOFF TRENCH SECTION B-B A I .0' THICK CLASS B ROCK APRON ' MIN OF # 5 WASHED STONE FLOW FILTER FABRIC TEMPORARY CLASS'S RIP RAP FLOW PLAN W (SPILLWAY) MIN. 2/3 STREAM WIDTH SECTION A -A . OCK CHECK DAM NTS # 5 WASHED STONE A FILTER FABRIC NOTES: I . EXCAVATION SHALL BE PERFORMED ONLY IN DRY AND/OR ISOLATED SECTIONS OF CHANNEL. 2. IMPERVIOUS DIKES SHOULD BE USED TO ISOLATE WORK AREAS FROM STREAM FLOW. 3. THE CONTRACTOR SHALL NOT DISTURB MORE AREA THAN CAN BE STABILIZED IN ONE WORKING DAY. A MAXIMUM OF 200 FEET MAY BE DISTURBED AT ANY ONE TIME. 4. THE CONTRACTOR SHALL BE RESPONSIBLE FOR DETERMINING PUMP SIZE SUFFICIENT TO PUMP BASE FLOW. 5. DIKE MUST BE CONSTRUCTED OF NON -ERODIBLE MATERIALS SUCH AS SANDBAGS. SEQUENCE OF CONSTRUCTION: I . INSTALL STILLING BASIN AND STABILIZED OUTFALL USING CLASS A RIP RAP AT THE DOWNSTREAM END OF THE DESIGNATED PROJECT WORKING AREA. 2. THE CONTRACTOR SHALL INSTALL THE PUMP AROUND PUMP AND THE TEMPORARY PIPING THAT WILL CONVEY THE BASE FLOW FROM UPSTREAM OF THE WORK AREA TO THE STABILIZED OUTFALL. 3. INSTALL UPSTREAM IMPERVIOUS DIKE AND BEGIN PUMPING OPERATIONS FOR STREAM DIVERSION. 4. INSTALL THE DOWNSTREAM IMPERVIOUS DIKE AND DEWATERING PUMPING APPARATUS IF NEEDED TO DEWATER THE ENTRAPPED AREA. THE PUMP AND HOSE FOR 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 RIP RAP. 5. THE CONTRACTOR SHALL EXCAVATE ANY ACCUMULATED SILT AND DEWATER BEFORE REMOVAL OF THE IMPERVIOUS DIKE. WHEN DEWATERING AREA, ALL DIRTY WATER MUST BE PUMPED THROUGH A SILT BAG. REMOVE IMPERVIOUS DIKES, PUMPS, AND TEMPORARY FLEXIBLE HOSE/PIPING STARTING WITH THE DOWNSTREAM DIKE FIRST. 6. ONCE THE WORKING AREA IS COMPLETED, REMOVE ALL RIP RAP AND IMPERVIOUS DIKES AND STABILIZE DISTURBED AREAS WITH SEED AND MULCH. 7. ALL WORK IN CHANNEL MUST BE COMPLETED BEFORE REMOVING IMPERVIOUS DIKE. WORK DE -WATERING AREA PUMP IMPERVIOUS DIKE SILT BAG LOCATION STABILIZED OUTFALL CLASS A STONE FILTER FABRIC STABILIZED OUTFALL CLASS A STONE FLOW FILTER FABRIC EXISTING GROUND INTAKE HOSE PUMP AROUND PUMP IMPERVIOUS DIKE DISCHARGE HOSE NOTE: NOSE SHOULD BE KEPT OUTSIDE OF WORK AREA 15' TO 20' i\\�\�\i \\i\iii�\i \\�\\\ EXISTING CHANNEL SILT BAG PROFILE DISCHARGE HOSE 8" OF CLASS A STONE PUMP ABOUND $ DEWATERING DETAIL NTS / 1 res 3600 Glenwood Ave, Suite 100 Raleigh, NC 27612 Main: 919.829.9909 www.res.us Engineering Services Provided By: Angler Environmental, LLC License: F-1428 SEAL REVISIONS: PLOT DATE: RELEASED FOR: PRELIMINARY - NOT FOR CONSTRUCTION 10/2/2020 PROJECT NAME: COWFORD MITIGATION SITE ONSLOW COUNTY DRAWING TITLE: DETAILS PROJECT NUMBER: PROJECT MANAGER: DESIGNED: DRAWN: CHECKED: 0675 MB BRC SCF AFM SHEET NUMBER: D1 I FILE NAME:R:\Resgis\dropboxgis\projects\NC\Cowford\CAD\DWG\0675_SHT_DETAILS.dwg SAVED BY: Sfasking LINE POST BARBED OR ELECTRIC WIRE 16' MAX. WOVEN WIRE BARBED OR ELECTRIC WIRE ■■■1IIIMMEMME■■■■■■■■■i MEMME■■■■■■■■■■■■■■■■1II1■■■ ■■■IIIIMMEMME■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■IIIIMMM ■■■IIIIMMEMME■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■IIIIMMM ■■■IIIIMMEMME■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■IIIIMMM ■■■IIIIMMEMME■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■IIIIMMM 4" TO 6" WOVEN WIRE GROUND LINE NOTES: II II II; lip III LINE PANEL II LINE POST 3" MIN. I I1 I� III z_ WOVEN WIRE WITH ONE BARB DETAIL LINE POST WOVEN WIRE: ASTM CLASS 3 GALVANIZED. TOP AND BOTTOM WIRES MIN. 12 GAUGE. INTERMEDIATE AND STAY WIRES MIN. 12 I /2 GAUGE. I . 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 I .3 LBS./FT. (EXCLUDING ANCHOR PLATE). POSTS SHALL BE DRIVEN A MINIMUM OF 18" DEEP AND MUST BE AT LEAST 5.5 FT IN LENGTH 4. SPECIES AND TREATMENT FOR ALL WOOD: USE UNTREATED DURABLE POSTS OF SPECIES SUCH AS RED CEDAR, BLACK LOCUST OR OSAGE-ORANGE WITH BARK REMOVED, OR NON -DURABLE WOOD THAT IS PRESERVATIVE PRESSURE TREATED (0.40 LBS./CUBIC FOOT CCA, OR EQUIVALENT NON-CCA TREATMENT). DO NOT USE RED PINE. WOVEN WISE FENCE (NRCS DETAIL 382A) NTS EXISTING GRADE MIN 12.0' EROSION CONTROL WATTLE/ SILT FENCE SLOPE �T / NOTES: I . MAINTAIN HAUL ROAD DURING CONSTRUCTION 2. RETURN TO ORIGINAL GRADE AT THE COMPLETION OF WORK 3. VEGETATE ALL DISTURBED AREAS 4. REMOVE COMPOST FILTER SOCK UPON ESTABLISHMENT OF VEGETATION -YPICAL HAUL .OAD NTS EXISTING GRADE EXISTING GRADE 2" x 2" X 2' WOODEN STAKE ON 2' CENTERS SLOPE \77- MINIMUM 9" EROSION CONTROL COIR WATTLE/LOG PROFILE VIEW NOTES: I . EROSION CONTROL WATTLES OR COIR LOGS/WATTLES MAY BE USED IN PLACE OF SILT FENCE 2. INSTLL A MINIMUM OF 2 UPSLOPE STAKES AND 4 DOWNSLOPE STAKES AT AN ANGLE TO WEDGE WATTLE IN PLACE MAI NTENANCE: I . INSPECT WATTLE PERIODICALLY AND AFTER EACH SIGNIFICANT RAINFALL EVENT FOR DAMAGE AND SEDIMENT ACCUMULATION 2. REPLACE OR CLEAN WATTLE AS NEEDED TO ALLOW WATER TO DRAIN THROUGH THE NATURAL FIBERS BETWEEN RAINFALL EVENTS EROSION CONTROL WATTLE NTS TOP OF BANK RIP RAP APPROACH (5' MIN) TIMBER MAT CROSSING CLASS B RIP RAP TIMBER MAT INSTALLED PERPENDICULAR CARRIAGE BOLT (TYP) CLASS B RIP RAP /\ \/\/\/ \.,\\ . %\/%/%/ \ X\ . \\%�%�%\ \\ \\ FILTER FABRIC TOE OF BANK (TYP) TOE OF BANK TIMBER MAT APPROACH FLOW SEDIMENT RAIL TIMBER MAT INSTALLED MIN HEIGHT = 4" PARALLEL •/I •S �: a� a ..1 •le r/ / 41.et 00(00 a 00 3 O F1 1.1 1.1 PLAN VIEW SEDIMENT RAIL MIN HEIGHT = 4" TIMBER MAT INSTALLED PERPENDICULAR TIMBER MAT TOP OF BANK INSTALLED PARALLEL fix\•\\•\\\,%\\�\\ � APPROXIMATE BASE FLOW WATER SURFACE SECTION VIEW NOTES: CARRIAGE BOLT TIMBER MAT (TYP) I . TIMBER MATS SHALL BE USED FOR TEMPORARY CONSTRUCTION ACCESS TO TRAVERSE WET AND/OR MUDDY ARES ADJACENT TO THE STREAM AND TO CROSS THE STREAM AND OTHER CONCENTRATED FLOW AREAS. 2. THE STREAM CROSSING SHALL BE INSTALLED IN A DRY CONDITION WHEN FLOW IS LOW. THERE SHALL BE MINIMAL TO NO DISTURBANCE OF THE CHANNEL BED AND BANKS AS A RESULT OF INSTALLING THE APPROACHES OR CROSSING. 3. THE LENGTH OF TIMBER MAT REQUIRED TO CROSS THE STREAM OR CONCENTRATED FLOW AREAS SHALL BE SUCH THAT THE TIMBER MAT EXTENDS PAST THE TOP OF BANK ON EACH SIDE OF THE CROSSING A SUFFICIENT DISTANCE TO SUPPORT THE MAXIMUM EQUIPMENT SIZE USING THE CROSSING. 4. STREAM CROSSINGS SHALL BE INSTALLED WITH THE TIMBER MAT LENGTHS ORIENTED PERPENDICULAR TO THE TOPS OF THE STREAM BANKS. TIMBER MAT STREAM APPROACHES SHALL BE INSTALLED WITH THE TIMBER MAT LENGTHS ORIENTED PARALLEL TO THE TOPS OF THE STREAM BANKS. 5. TIMBER MATS SHALL HAVE A SOLID DECK WITH NO GAPS OR SPACES ALLOWED BETWEEN THE INDIVIDUAL BOARDS/TIMBERS. 6. A 4" MINIMUM HEIGHT SEDIMENT RAIL SHALL BE PROVIDED AT STREAM CROSSINGS TO PREVENT TRACKED SEDIMENT FROM FALLING INTO THE STREAM BED. 7. STREAM CROSSING APPROACHES FROM DRY AREAS SHALL BE CONSTRUCTED USING CLASS B RIP RAP PLACED OVER FILTER FABRIC. 8. ALL TIMBER MATS, FILTER FABRIC, AND RIP RAP SHALL BE COMPLETELY REMOVED FROM THE SITE WHEN THE CROSSING IS REMOVED. TIfVBE� MAT TEMVPORAY CROSSING NTS CHANNEL BOTTOM -\\ OF BANK O INSTALL WATTLE IN 2" TO 3" TRENCH 3.0' • • FLOW A y A LIVE STAKES LIVE STAKES z_ O N 4" CEDAR POST '_'/ x.. \ i \ \\ \\ \\ \\ \\ \\ \\ \\ \\ , A " \ ,/ / //j //j//j//jam/j//j//jM%} \/ \/ \/ \ /\ / /////j /j//\\//j\\//j\\//\\// /\ / /\/\/\// SECTION B-B CHANNEL TOP OF BANK LIVE STAKES SMALL BRANCHES AND BRUSH LIVE STAKES PROPOSED STREAM BED FLOW ENGINEERED SEDIMENT PACK (ESP) NTS z_ O z_ O N \ VV „` \A / \A� BANKFULL SMALL LOGS AND/OR LARGE BRANCHES WITH A MIN DIAMETER OF 4" i\\/\i//\�/O%i/i0/A A SECTION A -A NOTES: I . DRIVE 2 ROWS OF 4" CEDAR POSTS ON MINIMUN 3' CENTERS PAST MINIMUM DEPTH AS SHOWN. 2. FILL THE VOID BETWEEN POST ROWS W/ AN EVEN MIX OF HARDWOOD LOGS, LIMBS, AND BRUSH AS SHOWN. 3. REDUCE POST SPACING AS NEEDED TO IMPROVE STRUCTURE STABILITY. 4. SEE TABLE ON PLANTING SHEET(S) FOR ACCEPTABLE LIVE STAKE SPECIES AND COMPOSITION. MIN. 2' (UNLESS ADDITIONAL COVER IS REQUIRED BY MANUFACTURER) FILTER FABRIC SEE PLAN SHEET FOR CULVERT INVERT ELEVATION COARSE AGGREGATE (#5 WASHED STONE) 6" DEEP EARTH FILL \\\\\\ \ \\ \\ j\\ j�� \/j/, ` PIPE SIZE PER PLAN SECTION VIEW PROPOSED CULVERT CROSSING NTS INSTALL CLAY PLUG 2 FEET BELOW CULVERT INVERT COARSE AGGREGATE (#5 WASHED STONE) NOTES: I . 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 LOADING REQUIREMENTS. FLOW MIN 3' 0i111 _ MIN 3' a 1=-=E=========E l=======E 0 ra/0 o =I= HEil O\O\n\O\On\OOCDI lI\1 I II -III -II =1---�I-OlI DIIIEARTH FILL I I II EWE IEL - 11=I; Hal � I I )I11111 11=I 1 1 II HMI E IIEII\i=111==1=1=1=Il1 IU==1 11-=1=1==1 11=OI-1 - 1I1I1I111111111111111111111llll111111111I11I1I111111111111I1II - II 11i1iIi1i11iIi1i1il II1i1i1i1ii1iIiIi1ii II IIII IIIIIIII IIII IIIIIIIIIIIIIIIII JIII III III III II III III III III IIIJIIIIIJII III III III III III III \ /\/\ \ \/\/\-III CD0 cli? C--OC--?0OCDIO�O�O� II I IODU/U0000 I O' MIN. I O' MIN. TOP OF BANK STREAM CHANNEL PLAN VIEW a SET LOG ELEVATION AT CHANNEL BED AS SPECIFIED ON PLAN SHEET PROFILE VIEW / 1 res 3600 Glenwood Ave, Suite 100 Raleigh, NC 27612 Main: 919.829.9909 www.res.us Engineering Services Provided By: Angler Environmental, LLC License: F-1428 SEAL REVISIONS: PLOT DATE: RELEASED FOR: PRELIMINARY - NOT FOR CONSTRUCTION 10/2/2020 PROJECT NAME: COWFORD MITIGATION SITE ONSLOW COUNTY DRAWING TITLE: DETAILS PROJECT NUMBER: PROJECT MANAGER: DESIGNED: DRAWN: CHECKED: 0675 MB BRC SCF AFM SHEET NUMBER: D2 FILE NAME:R:\Resgis\dropboxgis\projects\NC\Cowford\CAD\DWG\0675_SHT_DETAILS.dwg SAVED BY: Sfasking KEY COIR MATTING INTO BANK 1 /4 MAX POOL DEPTH 1 /4 MAX POOL DEPTH MIN 2.0 // SMALL LOGS AND/OR LARGE BRANCHES WITH A MIN DIAMETER OF 4" MIN 5.0' INSTALL COIR MATTING PER DETAIL SEE DWG DI COMPACTED SOIL LIFT LIVE STAKES SECTION A -A LIVE CUTTINGS SMALL BRANCHES AND BRUSH TOE PROTECTION (LARGER CHANNELS) CHANNEL TOP OF BANK CHANNEL BOTTOM OF BANK DUSH TOE NTS TOP OF BANK NOTES: 1. OVER EXCAVATE THE OUTSIDE BEND OF THE CHANNEL. PLACE LARGER BRANCHES AND LOGS IN A CRISS-CROSS PATTERN. LOCK IN PLACE WITH DLL COVERING 6 IN TO 12 IN OF THE LARGER BRANCHES/SMALL LOGS. 2. PLACE SMALLER BRANCHES AND BRUSH OVER THE LARGER BRANCHES/SMALL LOGS (HARDWOOD SPECIES ONLY) AND COMPACT LIGHTLY TOGETHER. BACKFILL AND COMPACT TO LOCK IN PLACE. 3. PLACE LIVE CUTTINGS OVER THE SMALL BRANCHES AND BRUSH. SEE TABLE ON PLANTING SHEET FOR ACCEPTABLE LIVE CUTTING AND LIVE STAKE SPECIES AND COMPOSITION. CUTTINGS SHOULD BE RINSED AT CUTTING POINT TO ALLOW BETTER ROOTING. 4. INSTALL EROSION CONTROL (COIR) MATTING OVER COMPACTED SOIL PER DIRECTION OF ENGINEER. COIR MATTING SHOULD BE KEYED INTO TOP OF BANK. 5. INSTALL 1 TO 3 ROWS OF LIVE STAKES ABOVE THE LIVE CUTTINGS LAYER PER DIRECTION OF ENGINEER. 6. LIVE CUTTINGS SHOULD NOT EXTEND PASTA OF CHANNEL BOTTOM WIDTH. A NW - A TYPICAL PLAN VIEW COIR MATTING DIBBLE PLANTING METHOD USING THE KBC PLANTING BAR 1-11=11 11=11=1 iii#11.=11= 1.=11.=11?=11.=11. ?11-11.=11 ;11.=11.=11= .=11.=11. 11.=11.=It li.=11.=11= I:I.II=l.11.n 1.11.I1.11.I1.1 1. INSERT PLANTING BAR AS SHOWN AND PULL HANDLE TOWARD PLANTER. `I=111 g& ° II II.u11=11 '11:ii=11= 11: ,11: ,11 11' ;11; l=11=11.= 11- 11=11: ,11. ,11 ::�1:11�1:11�1:11�1:11�1:11�1:11 4. PULL HANDLE OF BAR TOWARD PLANTER, FIRMING SOIL AT BOTTOM. "lift i `.11.-11.=`.1 11=11=1 1=11=11. 11=11= :11=11=1 11=11=11r,, 1=11=11. 1 1=11=1141=11=11.1 11.=11.=11=11.=11.=1 2. REMOVE PLANTING BAR AND PLACE SEEDING AT CORRECT DEPTH. 11- -u=N=u=d= 1 11=11V 11.=11.=1L 11= 11.=1I 11=11= 11 11=1I.= iL=11.=11; 11- =11=11=11=11= 11.=11=11=11.=1I.=Ili 11=i =11=11=11=11= =10 11=11.=11.=11=Ih 5. PUSH HANDLE FORWARD FIRMING SOIL AT TOP. =1 =II o' ?I1.=IL II] -I II t II -II -II! IL �11.=IIF':11:=11:=11:= I�-�IIF91':AlIF911F9111 11=11.=11.=11.=11.=11.= n.11.11.11.11.1111.11.11.11.11 JL 3. INSERT PLANTING BAR 2 INCHES TOWARD PLANTER FROM SEEDING. 11.=1i 11.=11= '11 11.- 1= :11:=116-11.=11.= 11! 11;'=11.=11. 1:= =11'=141.11.=11.= 11=1111, 11=11. 1=11=11=11.=11.=11.= 6. LEAVE COMPACTION HOLE OPEN. WATER THOROUGHLY. BASE PLANTING NOTES: PLANTING BAG DURING PLANTING, SEEDLINGS SHALL BE KEPT IN A MOIST CANVAS BAG OR SIMILAR CONTAINER TO PREVENT THE ROOT SYSTEMS FROM DRYING. KBC PLANTING BAR PLANTING BAR SHALL HAVE A BLADE WITH A TRIANGULAR CROSS SECTION, AND SHALL BE 12 INCHES LONG, 4 INCHES WIDE AND 1 INCH THICK AT CENTER. ROOT PRUNING ALL SEEDLINGS SHALL BE ROOT PRUNED, IF NECESSARY, SO THAT NO ROOTS EXTEND MORE THAN 10 INCHES BELOW THE ROOT COLLAR. .00T PLANTING NTS NOTES: BARE ROOTS SHALL BE PLANTED 6 FT. TO 10 FT. ON CENTER, RANDOM SPACING, AVERAGING 8 FT. ON CENTER, APPROXIMATELY 680 PLANTS PER ACRE. KEY COIR MATTING INTO BANK MIN 2.0' CHANNEL TOP OF BANK INSTALL COIR MATTING PER DETAIL LIVE STAKES COMPACTED SOIL LIFT ,/- LIVE CUTTINGS MIN 3.0' SECTION A -A CHANNEL BOTTOM OF BANK HAY BALE SHALL BE EVEN WITH DESIGNED BANK SLOPE. AVOID EXCESSIVE PROTUSION FROM TOP OF BANK BANK. DOWNSTEAM HEAD OF RIFFLE ELEVATION HAY BALE TOE A A NW - TYPICAL PLAN VIEW NOTES: COIR MATTING 1. HAY BALES SHALL BE APPROXIMATLY 1 4" X 1 8" X 36" STANDARD 2 STRAND (BIODEGADABLE TWINE) BALES. 2. OVER EXCAVATE THE OUTSIDE BEND OF THE CHANNEL. INSTALL HAY BALE, BACKFILL AND COMPACT TO LOCK IN PLACE. 3. HAY BALES SHOULD BE INSTALLED SUCH THAT THE TOP OF THE BALE IS AT THE SAME ELEVATION AS THE HEAD OF THE DOWNSTREAM RIFFLE. 4. PLACE LIVE CUTTINGS OVER THE HAY BALE. SEE TABLE ON PLANTING SHEET FOR ACCEPTABLE LIVE CUTTING AND LIVE STAKE SPECIES AND COMPOSITION. CUTTINGS SHOULD BE RINSED AT CUTTING POINT TO ALLOW BETTER ROOTING. 6. LIVE CUTTINGS SHOULD NOT EXTEND PAST% OF CHANNEL BOTTOM WIDTH. 7. INSTALL COMPACTED SOIL LIFT. COIR MATTING SHOULD BE WRAPED UNDER SOIL LIFT AND KEYED INTO TOP OF BANK. 8. INSTALL 1 TO 3 ROWS OF LIVE STAKES ABOVE THE LIVE CUTTINGS LAYER PER DIRECTION OF ENGINEER. NTS UNCOMPACTED BACKFILL 1 .5' MINIMUM COMPACTED BACKFILL (1 2" LIFTS) 30' FINISHED GRADE / a 10' MIN i BANKFULL ELEVATION NEW CHANNEL BANK SHALL BE TREATED AS SPECIFIED IN PLANS PROPOSED CHANNEL INVERT IMPERVIOUS SELECT MATERIAL (PER DIRECTION OF ENGINEER) TYPICAL SECTION TOE PROTECTION CHANNEL PLUG NTS NEW CHANNEL TO BE -\\ CONSTRUCTED OLD CHANNEL TO BE DIVERTED OR ABANDONED PLAN VIEW CHANNEL PLUG EXISTING CHANNEL PLAN VIEW BANKFULL ELEVATION MIN. 25' MAX. 75' EXISTING CHANNEL �_ \ i -- j \\` BOTTOM/ /\i\ j \\ \ \\ \ii \ ii\\i \\�\\i\\i\�\ice\\�\\i\\i \\�\i\i\� \i \�\\i\ice\�\\�\\%'Xc�\\ \\i\\ice\\�\ i\\i\\� \\\ NOTES: 1. IN AREAS WHERE EXISTING CHANNEL IS TO BE ABANDONED, FILL EXISTING CHANNEL TO BANKFULL ELEVATION WHEN POSSIBLE. 2. CHANNEL MUST BE FILLED IN 1 2" TO 1 8" LIFTS AND COMPACTED ACCORDINGLY. 3. WHEN SPOIL DOES NOT EXIST IN ORDER TO COMPLETELY FILL EXISTING CHANNEL TO BANKFULL ELEVATION, FILL CHANNEL TO AN ELEVATION 6" ABOVE BANKFULL HEIGHT FOR AT LEAST 25 LF OUT OF EVERY 1 00 LF SEGMENT. REMAINING CHANNEL SECTIONS ARE TO BE FILLED TO A DEPTH OF NO LESS THAN 70% OF BANKFULL ELEVATION. CHANNEL ABANDONMENT AND BACKFILL NTS 70% BKFL COMPACTED BACKFILL (1 2" TO 1 8" LIFTS) TYPICAL SECTION TIE PROPOSED SWALE TO EXISTING GROUND COMPACT BACKFILL TO EXISTING GROUND ELEV (1 2" LIFTS) DEPENDENT ON TILE DEPTH NOTES: 2. 3. 4. 5. 6. OUTLET DRAIN TILE 2' BELOW EXISTING GROUND ELEV. PROPOSED SWALE BOTTOM WIDTH = 4' BANK SLOPES = 3:1 MAX SLOPE = 0.3% REMOVE EXISTING DRAIN TILE WITHIN EASEMENT PROFILE VIEW FILTER FABRIC INSIDE J J OUTSIDE 5' MIN CLASS 'B' RIP -RAP (MIN THICKNESS 2 X EXISTING DRAIN DIA.) EXCAVATE DOWN TO DRAIN TILE FOR A MINIMUM OF 15 FT OF TILE LENGTH, MAINTAINING MINIMUM 1: 1 SIDE SLOPES, OR SLOPES MEETING OSHA GUIDLINES. CONTRACTOR SHALL FOLLOW ALL OSHA TRENCHING AND EXCAVATION GUIDELINES. CUT OR BREAK DRAIN TILE AND REMOVE ALL FRAGMENTS FROM EXCAVATED TRENCH. REMOVED TILE IS TO BE DISPOSED OF OFF -SITE. BACKFILL DOWNSTREAM 10' OF TRENCH PER DRAN TILE PLUG DETAIL. INSTALL FILTER FABRIC ALONG THE UPSTREAM END OF THE DRAIN TILE PLUG AND INSTALL CLASS 'B' RIP -RAP. LINE THE TOP OF THE CLASS 'B' RIP -RAP WITH FILTER FABRIC AND INSTALL SELECT BACKFILL TO EXISTING GROUND SURFACE. DIG OUTLET SWALE AT PROPOSED DIMENSIONS AND TIE TO EXISTING GROUND. DRAIN TILE OUTLET W/ PLUG NTS GROUND SURFACE ELEVATION EXISTING DRAIN TILE / 1 res 3600 Glenwood Ave, Suite 100 Raleigh, NC 27612 Main: 919.829.9909 www.res.us Engineering Services Provided By: Angler Environmental, LLC License: F-1428 SEAL REVISIONS: PLOT DATE: RELEASED FOR: PRELIMINARY - NOT FOR CONSTRUCTION 10/2/2020 PROJECT NAME: COWFORD MITIGATION SITE ONSLOW COUNTY DRAWING TITLE: DETAILS PROJECT NUMBER: PROJECT MANAGER: DESIGNED: DRAWN: CHECKED: 0675 MB BRC SCF AFM SHEET NUMBER: D3 I FILE NAME:R:\Resgis\dropboxgis\projects\NC\Cowford\CAD\DWG\0675_SHT_DETAILS.dwg SAVED BY: Sfasking EXISTING GROUND 0.3' TO 0.5' DEPTH -1 1 30 FT MIN. I I — EXCAVATED SHALLOW DEPRESSION EXISTING GROUND NOTES: I . DEPRESSIONS SHALL MAKE UP NO MORE THAN 0.05 ACRES OF WETLAND AREA (APPROX. I .7%) 2. INDIVIDUAL DEPRESSIONS SHALL BE NO LARGER THAN 200 FT2 EXCAVATED SHALLOW DEPRESSIONS NTS INSTALL LIVESTAKES AROUND OUTSIDE OF MEANDER BENDS i\ /%/ \/ \i NOTES: INSTALL LIVESTAKES AROUND STRUCTURES PLAN VIEW LARGE CHANNEL SPACING SMALL CHANNEL SPACING r � NWS 0.75" TO 2" COIR FIBER MATTING FLAT TOP END -10.--egi LATERAL BUD SIDE BRANCH REMOVED AT SLIGHT ANGLE 1 0 O .y,. WATER TABLE v z_ DETAI L " > / TYPICAL SECTION COIR FIBER MATTING LIVESTAKE SPACING LARGE CHANNEL 1. SEE TABLE ON PLANTING SHEETS) FOR ACCEPTABLE SPECIES AND COMPOSITION. 2. LIVE STAKES SHOULD BE 2 TO 3 FEET LONG AND 0.75 TO 2 INCHES IN DIAMETER. 3. LIVE STAKES SHALL BE PLANTED ON I .5' ALTERNATING SPACING ON LARGE CHANNELS (POOL DEPTH > 2FT) AND 1 .0' ALTERNATING SPACING ON SMALL CHANNELS (POOL DEPTH < 2FT). 4. LIVE STAKES SHALL BE PLANTED ON ALL RESTORATION REACHES AND ALONG ALL ENHANCEMENT REACHES AS SHOWN ON PLANTING PLAN SHEET(S). LIVESTAKE SPACING SMALL CHANNEL CHANNEL / SWALE LIVE STAKING NTS 45 DEGREE TAPERED BUTT END LI VESTAKE COIR FIBER MATTING COIR FIBER MATTING CHANNEL BOTTOM OF BANK COARSE AGGREGATE BACKFILL (SEE NOTE #2) NON -WOVEN GEOTEXTI LE FABRI C (NCDOT TYPE II) BRUSH TOE PROTECTION LENGTH = BKF WIDTH (UNLESS OTHERWISE NOTED ON THE PLANS) CHANNEL TOP OF BANK POOL NOTES: A I, 4NIGH ,I1 AI .0110 Cat '�itZ*la o0 o�o�c ..iir FLO W TYPICAL PLAN VIEW POINT REFERENCED IN STRUCTURE TABLE; TOLERANCE ± 0. 1' B' 0 N r) 1. LOGS SHOULD BE RELATIVELY STRAIGHT HARDWOOD AND RECENTLY HARVESTED. 2. COARSE AGGREGATE BACKFILL SHALL CONSIST OF AN EQUAL MIX OF #57 STONE, SURGE STONE, AND CLASS A RIPRAP. 3. HIGH SIDE OF LOG SHALL BE APPROX. 0.2' HIGHER THAN LOW END. 4. LOG DIMENSIONS: MIN DIAM. = 12", MIN LENGTH = 18' NAIL FILTER FABRIC USING 3" 1 OD GALVANIZED COMMON NAIL EVERY 1 .5' ALONG THE LOG. PROPOSED STREAM BED FLOW BACKFILL WITH COARSE AGGREGATE (SEE NOTE #2) PROPOSED STREAM BED FLO W MIN. 5.0' BACKFILL WITH COARSE AGGREGATE (SEE NOTE #2) NON -WOVEN GEOTEXTI LE FABRI C (NCDOT TYPE II) TACK FABRIC TO LOG LOG SILL NTS NON-WOV GEOTEXTILE FABRIC (NCDOT TYPE II) TACK FABRIC TO LOG MIN. 5.0' SCOUR POOL SECTION A -A' (OPT 2) COIR MATTING \/\ jj\\ jam\\\ SECTION A -A' (OPT I ) SEE PROFILE FOR POOL DEPTH HEADER LOG FOOTER LOG POINT REFERENCED IN STRUCTURE TABLE; TOLERANCE ± 0. 1' SECTION B-B' BACKFILL WITH COARSE AGGREGATE (SEE NOTE #2) SEE PROFILE FOR POOL DEPTH /-\°° nc //\/ \/\\ ,\ POINT REFERENCED IN STRUCTURE TABLE; TOLERANCE ± 0. 1' HWV BOTTOM OF BANK DOWN VALLEY A' TYPICAL PLAN VIEW HWV TOP OF BANK PROPOSED HWV BED WOODY DEBRIS FILL (LOGS, BRANCHES, AND BRUSH) COMPACTED WITH SOIL NON -WOVEN GEOTEXTILE FABRIC (NCDOT TYPE II) COMPACTED FILL NOTES: COMPACT BACKFILL NON -WOVEN GEOTEXTI LE FABRI C (NCDOT TYPE II) TACK FABRIC TO LOG COIR MATTING HEADER LOG FOOTER LOG 1. LOGS SHOULD BE RELATIVELY STRAIGHT HARDWOOD AND RECENTLY HARVESTED. 2. LOG DIMENSIONS: MIN DIAM. = 10", MIN LENGTH = 18' NAIL FILTER FABRIC USING 3" I OD GALVANIZED COMMON NAIL EVERY 1 .5' ALONG THE LOG. DUSH BED SILL NTS MIN 10' WOODY DEBRIS FILL (LOGS, BRANCHES, AND BRUSH) COMPACTED WITH SOIL MIN. 5.0'/ /\ /\\//\\//\// SECTION A -A' SECTION B-B' POINT REFERENCED IN STRUCTURE TABLE; TOLERANCE ± 0. 1' / 1 res 3600 Glenwood Ave, Suite 100 Raleigh, NC 27612 Main: 919.829.9909 www.res.us Engineering Services Provided By: Angler Environmental, LLC License: F-1428 SEAL REVISIONS: PLOT DATE: RELEASED FOR: PRELIMINARY - NOT FOR CONSTRUCTION 10/2/2020 PROJECT NAME: COWFORD MITIGATION SITE ONSLOW COUNTY DRAWING TITLE: DETAILS PROJECT NUMBER: PROJECT MANAGER: DESIGNED: DRAWN: CHECKED: 0675 MB BRC SCF AFM SHEET NUMBER: \ D4 I FILE NAME:R:\Resgis\dropboxgis\projects\NC\Cowford\CAD\DWG\0675_SHT_DETAILS.dwg SAVED BY: Sfasking TOP OF BANK 0 NOTES: 0 0 0 0 0 0.5 0.75" TO 2" 2.5 O CENTERLINE 'E? O O 0 0 PLAN VIEW TYPICAL SECTION FLAT TOP END LATERAL BUD SIDE BRANCH REMOVED AT SLIGHT ANGLE TOE OF SLOPE /- 0 0 0 0 0 0 • COIR FIBER MATTING WATER TABLE v J z 1 DETAIL 45 DEGREE TAPERED BUTT END MATTING LIMITS I . SEE TABLE ON PLANTING SHEETS) FOR ACCEPTABLE SPECIES AND COMPOSITION. 2. LIVE STAKES SHOULD BE 2 TO 3 FEET LONG AND 0.75 TO 2 INCHES IN DIAMETER. 3. LIVE STAKES SHALL BE PLANTED ON 5 FOOT CENTERS ALONG THE HEADWATER VALLEY TOE OF SLOPE AS SHOWN IN THE PLAN VIEW ABOVE. N EADWATE. VALLEY LIVE STAKING NTS A' SMALL POOL LARGE COBBLE/ SMALL BOULDERS ANCHOR BOULDER FLOW 0 re i• • • •/ i� • • • • • 1.41*11,*, l'fik ViOrlk 111. e.•u•�Oe.•v., ♦�•a.•, ♦ qel 0 oz �s • or•u•or1�� Oc•�•or•or•� i►•or0or• z•u•u1 ;6g•v•• •�•�•�•■►•�0�• oz ZOMIgg.1410.40ZOZOMOZ �•■rT•6O�•�•�•lt•�•�•�•■►•�O�• •u•a,•�•�•It: ••�•�•�•0•0,1 � te JOI e.•u•�•a.•e.•a.•" '�•a.•e.*'3$L 2 e.• IJ �•■►$ ' .••. ,.•�•0•.0�• • • • iAZ • • • 0,1: 6411.':1:1' 411:111:17111: 1:: gt13:1:6'7:11117471114011111:16: I 7.4.Iiii vd-ikTerp itip, ZI gl OZ OZ OZ C Iffee . ` er j �•■.•�1�Or•Ore Ore Ore Ore Ore Ore ■►•�1ll�• Ore ■.•••Or•aver • or 0or070ore or• 1�1�-1 foj or•■.•or 1•,I••■►•or 0or•ZO.��t�.j •��ii�o�i eIfYoi 0 Stalegre w ree. 46 0 v.iip411‘0, 0 al, 4 40 4.4.4:, . .4 A - 6" LOGS 0.5' MIN 1 .0' MIN 4" - 6" LOGS POOL ANCHOR BOULDER / RIFFLE MATERIAL; SEE TABLE 1 BEGIN RIFFLE CONTROL POINT FLOW GLIDE 4.0' TYP 4" - 6" LOGS / CHANNEL BOTTOM WIDTH ••oP•e,:+► CROSS SECTION A -A' VARIES PER PROFILE / /\ PROFILE LARGE COBBLE/SMALL BOULDERS, TYP 4.0' TYP / /\ TOP OF BANK %-7---77\mil- /\ /\ /\ /\ PROPOSED TOE OF BANK RIFFLE MATERIAL; SEE TABLE 1 GRADE CONTROL ROCK 50/50 MIX OF CLASS A AND B RIPRAP PROPOSED TOP OF BANK END RIFFLE CONTROL POINT RUN GRADE CONTROL ROCK 50/50 MIX OF CLASS A AND B RIPRAP .RIPPLE GRADE CONTROL NTS POOL NOTES: . RIFFLE GRADE CONTROL STRUCTURES SMALL BE INSTALLED IN NEWLY GRADED CHANNEL SECTIONS, AS SPECIFIED ON THE PLAN SHEETS. 2. ELEVATION CONTROL POINTS SMALL BE DESIGNATED AT THE BEGINNING AND END OF RIFFLE POINTS TO ESTABLISH PART OF THE PROFILE OF THE CHANNEL. SURVEY OF CONTROL POINTS SMALL BE REQUIRED 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 SMALL BE PLACED SUCH THAT THE ADDITION OF THE SPECIFIED THICKNESS OF RIFFLE MATERIAL SMALL ACHIEVE THE DESIGNATED GRADES. 4. RIFFLE MATERIAL SMALL BE COMPRISED OF ROCKS AND LOGS. THE ROCK MATERIAL COMPOSITION SMALL MATCH TABLE 1 . RIFFLE MATERIAL SMALL BE EXCAVATED, STOCKPILED, AND RE -USED FROM ABANDONED CHANNEL SECTIONS. ROCK RIFFLE MATERIAL OBTAINED OFFSITE SMALL BE SLIGHTLY ROUNDED, "RIVER -TYPE" ROCK, UNLESS OTHER ROCK CHARACTERISTICS ARE APPROPRIATE FOR THE CHANNEL. 5. SPACING AND NUMBER OF LOGS SHOULD BE BASED ON RIFFLE LENGTH AND MAY VARY BASED ON LOG AVAILABILITY. LOGS SHOULD BE SPACED EQUALLY AND ANCHORED TO THE CHANNEL BED WITH BOULDERS. 6. THE PLACEMENT OF GRADE CONTROL ROCK AND/OR RIFFLE MATERIAL SMALL BE DONE IN A MANNER TO CREATE A SMOOTH PROFILE, WITH NO ABRUPT "JUMP" (TRANSITION) BETWEEN THE UPSTREAM POOL -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 SMALL GENERALLY 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. 7. THE END OF RIFFLE CONTROL POINT MAY TIE IN TO ANOTHER IN -STREAM STRUCTURE (LOG SILL , J-HOOK, ETC.). NO LOGS SHOULD BE INCLUDED WITHIN THE FOOTPRINT OF THE PROPOSED STRUCTURE. 8. THE CONSTRUCTED RIFFLE SMALL BE KEYED IN TO THE STREAM BANKS AND/OR BED AS DESIGNATED BY THE DESIGNER. THE "KEY" SMALL EXTEND BEYOND THE TOP OF BANK FOR THE LENGTH OF THE 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. TABLE I - RIFFLE COMPOSITION REACH STONE SIZE % KJI #57 25 SURGE 75 LARGE COBBLE/ SMALL BOULDERS A' FLOW 0101, f7...tpc,V4 . . .,,T,,._',1 V!..!;;%.'; ir.,401171" i•�1.�;. , � .01.01. KO�•• Q� 1rAllt► tti!• I. V► AP Ix., aP <- •t. All, 0.4,...n.."1,11ryiy.ez gezeziWALlzkOz Pe lijUglAole. wt.', Al s • Aih� •'ice • s.._• .`iCI�'ptic�: Talk v' ..-• O 0.w. 1 aWila. . c.II..•.1...•.*,.•.a A CHANNEL BOTTOM WIDTH 0.75' MIN /\\\\\\ •.Zie t11 . BEGIN RIFFLE CONTROL POINT RIFFLE MATERIAL; SEE TABLE I GLIDE POOL MAX 2"-3" BRANCHES CROSS SECTION A -A' VARIES PER PROFILE 1 POOL LARGE COBBLE/SMALL BOULDERS, TYP TOP OF BANK /\\\//\//\/K/<' PROPOSED TOE OF BANK RIFFLE MATERIAL; SEE TABLE I PROPOSED TOP OF BANK END RIFFLE CONTROL POINT RUN //`/A//i:AAA //\ //, PROFILE PICAL .RIPPLE NTS NOTES: I . TYPICAL RIFFLES SMALL BE INSTALLED IN ALL NEWLY GRADED CHANNEL SECTIONS THROUGHOUT THE PROJECT UNLESS OTHERWISE SPECIFIED ON PLAN SHEETS. 2. ELEVATION CONTROL POINTS SMALL BE DESIGNATED AT THE BEGINNING AND END OF RIFFLE POINTS TO ESTABLISH PART OF THE PROFILE OF THE CHANNEL. SURVEY OF CONTROL POINTS SMALL BE REQUIRED TO ESTABLISH ACCURATE RIFFLE INSTALLATION WITHIN A TOLERANCE OF ±0.2'. 3. RIFFLE MATERIAL SMALL BE COMPRISED OF 75% ROCKS AND 25% WOODY MATERIAL. WOODY MATERIAL SHALL CONSIST OF LOGS, BRANCHES, AND BRUSH NO GREATER -MAN 3" IN DIAMETER. THE ROCK MATERIAL SMALL CONSIST OF NATIVE SUBSTRATE MATERIAL WHEN POSSIBLE. NATIVE MATERIAL SMALL BE EXCAVATED, STOCKPILED, AND RE -USED FROM ABANDONED CHANNEL SECTIONS. IF A SUITABLE QUANTITY OF NATIVE SUBSTRATE MATERIAL CANNOT BE HARVESTED, CONTRACTOR MAY SUBSTITUTE THE RIFFLE MATERIAL WITH ROCK MATCHING THE COMPOSITION IN TABLE 1 . 4. THE PLACEMENT OF RIFFLE MATERIAL SMALL BE DONE IN A MANNER TO CREATE A SMOOTH PROFILE, WITH NO ABRUPT "JUMP" (TRANSITION) BETWEEN THE UPSTREAM POOL -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 SMALL GENERALLY 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. 5. THE END OF RIFFLE CONTROL POINT MAY TIE IN TO ANOTHER IN -STREAM STRUCTURE (LOG SILL , J-HOOK, ETC.). NO LOGS SHOULD BE INCLUDED WITHIN THE FOOTPRINT OF THE PROPOSED STRUCTURE. TABLE I - STONE COMPOSITION REACH STONE SIZE % KJI -C #57 25 SURGE 75 / 1 res 3600 Glenwood Ave, Suite 100 Raleigh, NC 27612 Main: 919.829.9909 www.res.us Engineering Services Provided By: Angler Environmental, LLC License: F-1428 SEAL REVISIONS: PLOT DATE: RELEASED FOR: PRELIMINARY - NOT FOR CONSTRUCTION 10/2/2020 PROJECT NAME: COWFORD MITIGATION SITE ONSLOW COUNTY DRAWING TITLE: DETAILS PROJECT NUMBER: PROJECT MANAGER: DESIGNED: DRAWN: CHECKED: 0675 MB BRC SCF AFM SHEET NUMBER: \ D5 I FILE NAME:R:\Resgis\dropboxgis\projects\NC\Cowford\CAD\DWG\0675_SHT_DETAILS.dwg SAVED BY: Sfasking l CHANNEL TOP OF BANK SEE PLAN SHEET FOR POOL WIDTH CHANNEL BOTTOM OF BANK PLAN VIEW PROPOSED SWALE SEE PLAN SHEET FOR XS DIMENSIONS TREATMENT POOL SEE PROFILE FOR POOL DEPTH ///\/\/\/\ \ \\\\\/, // A/, PROPOSED TREATMENT POOL NOTES: PROFILE I . COIR MATTING SHALL BE INSTALLED ON ALL CHANNEL AND POOL BANKS PER THE COIR MATTING DETAIL 2. CHANNEL AND POOL BANKS SHALL BE LIVE STAKED PER THE CHANNEL/ SWALE LIVE STAKING DETAIL. SEE TABLE ON PLANTING SHEETS) FOR ACCEPTABLE SPECIES AND COMPOSITION. 3. CHANNEL AND POOL SHALL BE SEEDED PER THE RIPARIAN SEED MIX FOUND ON THE PLANTING PLAN SHEETS) TREATMENT POOL NTS PROPOSED CHANNEL BED i ,, res 3600 Glenwood Ave, Suite 100 Raleigh, NC 27612 Main: 919.829.9909 www.res.us Engineering Services Provided By: Angler Environmental, LLC License: F-1428 SEAL REVISIONS: PLOT DATE: 10/2/2020 RELEASED FOR: PRELIMINARY - NOT FOR CONSTRUCTION PROJECT NAME: COWFORD MITIGATION SITE ONSLOW COUNTY DRAWING TITLE: DETAILS PROJECT NUMBER: PROJECT MANAGER: DESIGNED: DRAWN: CHECKED: 0675 MB BRC SCF AFM SHEET NUMBER: D6