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HomeMy WebLinkAbout20231153 Ver 2_More Info Received_20240306Shulls Mill Dam Removal Project Watauga River Basin 06010103 Watauga County, North Carolina for MountainTrue ID BROAO52p1ygR SITE x 0 d xc O s U s o Vicinity Map Not to Scale Il FINAL PLANS BEFORE YOU DIG! ISSUED JANUARY 26, 2024 CALL1-800-632-4949 N.C.IT'S THE OSTHELAW! LAW! i TER REVISED FEBRUARY 26 2024 Digitally signed Jacob P. by Jacob P. McLean Mc Lean Date: 2024.02.26 16:46:30-05'00' Sheet Index Title Sheet 0.1 General Notes and Symbols 0.2 Existing Conditions 0.3 Typical Sections 0.4 Project Overview 1.0 Plan -Profile Sheets 2.1-2.3 Grading Sections 3.1-3.4 Phasing & Sequencing 4.1-4.4 Erosion and Sediment Control 5.1 Planting Tables 6.0 Planting Plan 6.1 Details 7.1-7.6 Project Directory Engineering: Owner: Wildlands Engineering, Inc HE Club, Inc. License No. F-0831 1589 Dogwood 167-B Haywood Rd Boone, NC 28607 Asheville, NC 28806 Jake McLean, Project Engineer Project Manager: 828-774-5547 MountainTrue Andy Hill Surveying: Kee Mapping and Surveying, PA 88 Central Avenue Asheville, NC 28801 Drew V. Duinkerken, PLS 828-575-9021 �Ln QLn W co � M O GENERAL NOTES 1. Under no circumstances will the Contractor exceed the limits of disturbance as shown on the Plans. 2. All erosion and sediment control practices shall comply with the North Carolina Erosion and Sediment Control Planning and Design Manual. All project activities shall comply with all permit and waiver requirements and conditions. Issued permits and waivers, as applicable, will be included in the project manual. 3. All materials shall be on hand before any work is started. All materials must be stored in an orderly manner away from vehicular traffic, near the construction entrance, and away from waterways or storm drains in appropriate containers and/or enclosures. 4. Locations for staging and stockpile areas and the temporary stream crossing have been provided on the Plans. The contractor shall install and maintain erosion control devices sufficient to contain sediment around any erodible material stockpile areas as directed. Alternative staging and/or stockpile areas and stream crossings may be used by the Contractor provided that: a. the areas are within the limits of disturbance, b. all practices comply with the North Carolina Erosion and Sediment Control Planning and Design Manual, and c. that the Designer approves the areas prior to implementation. d. no earthen -material stockpile or staging area shall be located within the 25-foot buffer zone of any surface water classified as Trout Waters by the Environmental Management Commission. 5. When crossing an active section of new or old stream channel, a temporary stream crossing shall be installed according to the detail and specification. The type of temporary stream crossing may not be modified without modification to the permit. 6. Topsoil will be harvested, stockpiled and reapplied to the extent that it is encountered to assist with grass stabilization and tree growth. Soil amendments may be applied to assist with grass establishment and tree growth in some or all disturbed areas. The limits of application will be determined by the Engineer. 7. Trees will be removed pre -project with no or minimal ground disturbance and cut at base leaving root balls in place. All pre -project tree clearing shall occur prior to April 1. No trees greater than 3" in diameter will be removed during the project. 8. Same day stabilization shall occur for all activities on site. All bank repairs, stabilization, grading, or any other disturbances within the 25-foot buffer zone shall be completed by the end of each day. Work shall be scheduled so that at the end of each day bare ground is not exposed and all disturbed areas including banks shall have an adequate temporary or permanent ground cover in place. 9. Contractor shall take measures necessary to ensure that storm flows do no damage work areas or create sedimentation of aquatic habitat. Compliance must be maintained with the surface water quality turbidity standard (10 NTU in streams, lakes, or reservoirs designated as trout waters); if turbidity exceeds these levels due to natural background conditions, the existing turbidity level shall not be increased. If any exceedance occurs at any time during the project, activity within the buffer must cease immediately. More protective erosion and sedimentation control measures may be required in order to comply with this water quality standard. 10. Waste soil is anticipated on the project and the designer shall be notified of removal of borrow or waste of soil prior to commencement of such activities. Any off -site borrow and waste required for this project must come from a Project with an approved erosion control plan, a Project regulated under the Mining Act of 1971, or a landfill regulated by the Division of Solid Waste Management. 11. Existingtrash debris generated from demolition activities and/or denoted within the plans must be disposed / g / p p of at a facility regulated by the NC Division of Solid Waste Management or per Division of Solid Waste Management or Division of Water Resources Rules and Regulations. 12. No buffer/stream disturbing activity shall take place within the trout buffer zone during the trout spawning period of October 15 - April 15, unless the North Carolina Wildlife Resource Commission determines that the moratorium is not applicable to this project. INITIAL SITE PREPARATION AND EROSION CONTROL 1. Contact Division of Energy, Mineral and Land Resources at the Winston-Salem Regional Office at 336-776-9654 to schedule a pre -construction meeting at least 48 hours prior to project activation. 2. Contact North Carolina "One Call" Center (1-800-632-4949) before any excavation. 3. Mobilize equipment and materials to the Site 4. Establish construction entrance off Shulls Mill Road, upstream of the dam, as identified in the plans. This area is to be used for staging and stockpiling and the processing of dam material. Identify any other sediment control measures in the erosion control plan to put in place prior to construction. 5. Set up temporary facilities, locate equipment within the staging area, and stockpile materials needed for the initial stages of construction within the stockpile area(s). 6. Install and maintain an onsite rain gauge and logbook to record the rainfall amounts and dates. Maintain an approved copy of the E&SC plan with placard and approved letter and a copy of the NPDES permit with a minimum of 30 days of self -inspection reports on site until project closure by NCDEQ. Complete the self -inspection as required by NCDEQ permit. Rainfall records, completed self -inspection forms, and permits should be maintained on site. 7. Monitor for sediment loss and inspect all erosion features after each rain event. Maintain erosion control features according to the North Carolina Erosion and Sediment Control Manual. UT1 RESTORATION 1. Install pump around on the existing stream. Delineate the expected work area and isolate it using coffer dams to ensure a majority of stream flow is diverted around the work area. Pump any excess water that remains or seeps into the work area onto a grassed strip or into a sediment bag before returning it to the stream along a stable outlet downstream of the work area. 2. Harvest coarse material and vegetation transplants from the existing dewatered channel where possible. 3. Install in -stream structures (e.g. riffles, log and rock sills) and in -bank bioengineering such as brush toe and sod mats after channel grading is completed according to details and specifications. 4. While moving downstream with channel and structure construction, re -position the stream pump -around system when a delineated work area is completed and stabilized and a new one is started. 5. If applicable, backfill the existing channel from top to bottom pushing any water remaining in the old channel downstream. Do not backfill beyond where new stream channel has been constructed. 6. Implement native revegetation according to plans and contract documents. SHULLS MILL DAM REMOVAL 1. The full vertical and horizontal limits of the dam, including all rebar and concrete shall be removed with the exception noted on the plans. This exception is for the lower half of the dam on the far river left where it serves as sediment containment for the upstream terrace. 2. For instructions on sequencing and removal of Shulls Mill Dam, see Sheets 4.1- 4.4. WATAUGA RIVER RESTORATION 1. The riverbed will be graded down an average of approximately 3' through the historic impoundment area. The is the predicted pre -dam profile and base level of the river channel. 2. The river channel will be narrowed to the design bankfull width and a bankfull bench will be constructed approximately 3.5' above the average bed elevation. 3. All graded streambanks, benches and terrace slopes shall be matted with coir fiber erosion control matting per detail. No non -biodegradable materials shall be used. 4. Seed and straw all bare areas on the site with temporary and permanent seed. Prepare seedbed and apply seed and straw prior to placement of matting. 5. Implement native revegetation according to plans and contract documents. Livestakes and container plantings will typically be installed during the next dormant season. CONSTRUCTION PHASING 1. The Contractor should minimize work in the wet at all times. Access to the rive ill be via the existing sand bar near the top of the restoration reach. 2. Install erosion control measures and trim tree limbs along access routes as necessary prior to starting work. 3. Set up phase 1 diversion along existing river alignment by installing check dams to prohibit low flow from entering the left side channel left of the mid -channel bars. 4. Follow phasing and sequencing provided on Sheets 4.1- 4.4 to harvest rock and build the upstream left bank (Phase 1), shape the channel, remove the right portion of the dam, and disposed of excess material in the rock harvesting area (Phase 2), and complete dam removal, UT1 restoration, lower left bank work and other site activities (Phase 3). 5. Complete demobilization as delineated below. DEMOBILIZATION 1. All rock and other stockpiled materials must be removed from the limits of disturbance. All areas outside the grading areas shall be returned to pre -project conditions or better. The rock access used as the primary access and staging area shall be returned to pre -project conditions. 2. The Contractor shall ensure that the site is free of trash and leftover materials prior to demobilization of equipment from the site. 3. Seed, mulch, and stabilize all disturbed areas of bare earth including staging areas, access roads, and construction entrances. 4. Remove all temporary erosion control measures once permanent stabilization has been achieved. 5. Demobilize grading equipment from the site. Existing Features Proposed Features Proposed Structures Erosion and Sediment Control Features PROPOSED BOULDER BANK PROTECTION STAGING AND STOCKPILE AREA 10+00 EXISTING PROPERTY LINE - - - PROPOSED ALIGNMENT - - - TB - - - - - TB - - - EXISTING TOP OF BANK PROPOSED MAJOR CONTOUR - 5' PROPOSED BRUSH TOE PROPOSED HAUL ROAD EXISTING BOTTOM OF BANK PROPOSED MINOR CONTOUR -1' - EXISTING ALIGNMENT PROPOSED ROCK HARVESTING PEN PROPOSED CONSTRUCTION ENTRANCE -------100------- EXISTING MAJOR CONTOUR 5' AND EXCESS FILL WASTE AREAS OPROPOSED CASCADING RIFFLES AND POOLS - - - - - - - - - - - - - - - EXISTING MINOR CONTOUR 1' CONTINGENCY ROCK -SAF SAF SAF - PROPOSED TEMPORARY SAFETY FENCE HARVESTING AREA FEMA FP FEMA FP EXISTING FEMA FLOODPLAIN - [X] [XI [XI - SILT FENCE - FEMA Fw - FEMAFw - EXISTING FEMA FLOODWAY , EXISTING TREE LOD-LOD LIMITS OF DISTURBANCE ,s e SAVE EXISTING TREE - T T T - 30' TROUT BUFFER ZZ REMOVE EXISTING TREE \ / O TEMPORARY WOODMAT CROSSING EXISTING LARGE BOULDERS OR BEDROCK EXISTING UTILITY POLE A Zo Qrc oUyt� A�, m �lz °QF- oN A% r, a Cn WC) CD 0 M N O HIGHWAY 105 W '$ aZ Aaryv �• CONTROL KEE"( POINT Az "v °'�. 8 / RBC'KfE"1300) ' EL 18932 .79' % CON DAM ABANDONED 96965.19' -----L Z CMP THROUGH TROLPOINT �' � �--81189322J9'�,,.�W :2892.33' N:e96691.v' INV IN: BURIED'/`-0.99987134 :29M.35' INVOUT:2859.13'EEEv: z9oa.l4' -*6EING LocATEo CF: 0.99987056 �'' 5 2J"54'58" W 7380.07'/FROM NCGS MUNCYEXISTING DAM -' b- --_--_----yTOP=2872.0' - __--- — — — - d i �Oa�—_jqt��=' gi CONTROL POINT n 0 � e MdVV433 mdtl // gel___ i/�� �\ •r�`� ` V �i��iY �.... ••�/p,�p� R9C KEE" (301) / D ® f 7 w3! 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( V - I kl, -- -- _ _ / /ems �� �• v`I ��• I/ 11 F \\ .\ \\\\ -cM1\ / / / • �i / �� I*� III SHULLS MILL ROAD I � ��V�A � v AVA v-`�-. — .—�<---_ice � —_-'-� � �,. .����� � A / /�- I/ I O /A Jav � �• ✓S '" • _' $ /� �/ I `\ _ `--��I'/ \ / J,-_ —� \ _1 \ � I I r I\ //r/ \�_ —_\ \ ac• I \// zs // \,.� � -f\J, yam% �—/ '/� �' �— �-. � ��\_-�r� \\ ^� • O {�W ✓� �a �\ \1 / i /i noroafi I / �'�"�A v���v A�//� 11� I 1 I \.�f����j/�—"'�—�`--�--� �"� a _ / ��/ t�,i �dc•�%/I� / � J j�ii /// -- _ _ __-_ Ij CL-. /\\ - �1)� / O a2880�� _ '�am, i/ l\Jtl{1 (lam / /,'WATAUGARIVER x011/%///\I*Op _ — — /1 -- --� ✓ -A& �l� \RIVER RESTORATION NOTES: STA. 2+9S START RIVER RESTORATION WITH LEFT BANK AND BED TRANSITION GRADING- 2860 ---- —__ /// Off'—_-- // STA. 3+10START APPLICATION OF NARROW BENCH RIFFLE TYPICAL (SEE SHT. 0.4) '' --__ - -- - ✓i 'per -�� / /' /- -' i/ �1 ` STA. 3+40 START APPLICATION OF MAIN RIFFLE TYPICAL (SEE SHT. 0.4) — —� ''g65 —2860 — — _ _ START PROPOSED j STA. 5+30+/- UTI TRIBUTARY CONFLUENCE , ` — /— - _%%Z — �g -;— —CDT_ RIVER RESTORATION_ -'��_ " — ; r \ ~^ _ _ —STA.5+93STOPFULLAPPLICATIONOFTYPICALS,GRADEPERPLANCONTOURS(GRADINGMODEL) ____—_'----?�=_-_;;,,_=_=�z--= STA.3+00 STA. 6+20 START BED PROFILE TIE-IN TO EXISTING POOL STA.6+62END RIVER RESTORATION CHANNEL GRADING _ --- _--- -- `--_—'----__—_—_—_s—_--_---- — STA.7+07END LEFT BANK GRADING STA. 8+33 END RIGHT BANK GRADING (DEPENDENT ON ROCK HARVESTING ACTIVITIES) —__ ____--=18 ------ _--' -- --_-- REFER TO DETAILED SEQUENCING SHEETS 4.1-4.4FOR ADDITIONAL GUIDANCE 2870 2865 2860 2855 PLAN VIEW PROPOSED BANKFULL 3+10 START PROPOSED PROFILE WORK EXISTING GROUND (ALONG CENTERLINE) — — — — EXISTING BEDROCK AT INVERT OF POOL EXISTING THALWEG (SUPERIMPOSED) PROPOSED GRADE, GRADE POOLS AS DIRECTED 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 2870 2865 2860 2855 5+00 v a PROFILE oAactS �, rtiv�rt rt�� i �rtn i ivry rvv i ��: STA. 2+95 START RIVER RESTORATION WITH LEFT BANK AND BED TRANSITION GRADING ' STA. 3+10 START APPLICATION OF NARROW BENCH RIFFLE TYPICAL (SEE SHT. 0.4) STA. 3+40 START APPLICATION OF MAIN RIFFLE TYPICAL (SEE SHT. 0.4) STA. 5+30+/- UTl TRIBUTARY CONFLUENCE STA. 5+93 STOP FULL APPLICATION OF TYPICALS, GRADE PER PLAN CONTOURS (GRADING MODEL) • STA. 6+20 START BED PROFILE TIE-IN TO EXISTING POOL STA. 6+62 END RIVER RESTORATION CHANNEL GRADING STA. 7+07 END LEFT BANK GRADING STA. 8+33 END RIGHT BANK GRADING (DEPENDENT ON ROCK HARVESTING ACTIVITIES) 2870 2865 2860 2855 2850 2845 5+00 0' 20' 40' 60' (HORIZONTAL) a �o —via �2 j.l �� z \\ 1 \\� \\\\-_—l�\ll\ ` 1 -2860. It FOR PHASING ' y y_ — / /// 'I\ \ \O \ � LOD LOD \ \� \ / iOFRIVER ,v�� 6 — \� \ \�L_ �' /r �` `� 3WATAUGARIVER ii' /i Cy� 2870X 2I////j i _ L € (� \\\ �/, / DEMOANDDISPOSE OFMAN MADE ER IALS;THESE MAY BE BURIED AT DEPTH PER PLAN NOTES. / SEE SHEET0.2. /TB00 _ 'v -- / PRIMARY ROCK -HARVEST AREA AND SUBSEQUENT PLACEMENT AND STABILIZATION OF EXCESS FILL MATERIALv\ ALTERNATE ROCK HARVEST AREA (IF APPROVED BY DESIGNER) 'i__ —�J'/ / l �\l✓ 1 � �,_ ��\\11 \\\\\^ \ �\\ \\ 1 �g - �/ /=L I�T�,\I lrl, �`J // f / /. PLAN VIEW STA=6+20 ELEV = 2858.14 PROPOSED BANKFULL END LEFT BANK GRADING — -- -- BASE FLOW WATER SURFACE — III I PROPOSED GRADE � I / TIE INTO EXISTING POOL INVERT ELEVATION EXISTING GROUND (ALONG CENTERLINE) / / END RIVER STA=6+ ELE=201'5 RESSTORATITION / EXISTING THALWEG (SUPERIMPOSED) / -- \ I � 5+50 6+00 6+50 PROFILE 7+00 7+50 8+00 2870 2865 2860 2855 2850 2845 8+50 M r— w Lo M M O v N N (ao I II I xs J�s APPLY CASCADING FRIFFLEDETAILTOALLOF UTI, SEE SHEET 7.1 c go_ r / / // PROPOSED END UT1 RESTORATION 1+31 2860 2870- vA / g60- /(30 i l i J - UT1 RESTORATION NOTES: START GRADING AT STA. 0+53 USING THE UT-1 RIFFLE TYPICAL (SHT. 0.4) -TIE INTO EXISTING BEDROCK i STOP GRADING AT CONFLUENCE WITH WATAUGA RIVER AT STA. 1+31 (WATAUGA RIVER STA. 5+29) PLAN VIEW 2880 2875 2870 2865 2860 2855 0+00 EXISTING GROUND (ALONG PROPOSED CENTERLINE) \ \ PROPOSED BAI START RESTORATION STA.0+52 UT1 \ \ / PROPOSED GRADE \ END UTI RESTORATION AT CONFLUENCE WITH PROPOSED WATAUGA RIVER STA. 1+31 0+50 PROFILE 1+00 2880 2875 2870 JKFULL 2865 2860 2855 1+50 w c) w M . O v m m N -- J \\\III (�, 1 \11� rG•�ii % ��/iiiiiii//� - iJ: ��.. ,l \ \\ \ \ l \ \ Z - \-- ` PUS FO / L^ PROPOSED START 1\—//rJ /r --/'// l Jl l PROPOSED START STA. 0+52 \l ----- ill � 2870- PROPOSED END �fl& ) 2 UT1 RESTORATION 2a V \ STA. 1+31' \ fl /_ 6+00 / �—���� 1V�_��.I a �/�\AIVAIIj•.�.�_—= v --0�"` / �, �I1j�i��/' /' i �<b � A �5� __ — / 2865 If/ 0_ < RIVER 7` �� � ��—��—_—_--��� 0 \\ J' \ 2++oo_ L ----- —— O / — r �9 / _1 /r Ji- vVAAI VA \ _ _ ,:e' _ STARTPROPOSED 3+ 00 -4� -3U U 1-') 3Ucrs 2875 287C 2865 286C 2855 2850,75 -60 -45 -30 15 0 15 30 45 4+00 \ ' 0' 30' 60' l (HORI; NTAL) 'p, =`' U\ IJ Jlll/l111/IJSl) r -2870Illll/(1fl/l arm ti w, I �iAVo�'� STA.6+62RRESTORATION \ IIIII \� U\ LEGEND -bU -4::) -.iU -1.) U 1-1) SU 4-1) bU EXISTING GROUND PROPOSED GRADE M r w M M M 0 d-j lb --� (75 r� 4+50 -`JU -/�) -bU -45 -SU -15 U 1.7 SU 4.7 O u v Ln bA ��ri t i � �`i � i•/i ,�' '___—� �.— � - / \�" i � \ i"'ice iL ��• � ii.,-( PROPOSED START UTIRESTORATION STA.0+52 kz --- �— J /�s l� 9rLL`�'sk•., �1/ \ o� all PROPOSED END UTI RESTORATION STA. 1+31 / / /// / / It. i i/n(//mil l\iL\1 //f----/((\/s\��•- \�1"tl�l//�\——;i'— is'000.. 00 . —�,- I— � ) 'e l / / ri Z865 � � '92e% .E —2865— l� — _ _ O � r _ J\}I/\\�\_r 860� —� 5+00 -START PROPOSED 5+50 -/S -bU -45 -3U -15 U lb 3U 4S bU C O ��� v vAA�V'"P+vV v AV I IllAI11\V�l�lt�j\lA�\ / — }II A2. p \\ f IEND RIVER RESTORATION v STA. 6+62 v�O� 860 --30' \\WMZONTAL) ,. \tP 1 Z \ ~ o 1 \= t � 0 VA AVAVA63I�VFR i r / J � / �L > t 1 c � ., l r i �'�\•-._� COY—J^/,..;5! � \ LEGEND EXISTING GROUND PROPOSED GRADE 6+00 -9U -/S -bU -45 -3U -15 U 15 3U 45 bU /S 9U . / i vLI#— �i N cs r>\- -� —2875 — — / PROPOSED START pq, -- — — _UTIRESTORATION STA.0+52 t — \ V_� 0-- �iWATAUGARIVER //#o/ _ 1 , \ \ \ \ \ ` — 2g6S- — — — J-1 2 67 288s 288C 2875 287c 2865 286C 2855 285C RIVER RES - J STA.2+95 v� ti V_� 0-- �iWATAUGARIVER //#o/ _ 1 , \ \ \ \ \ ` — 2g6S- — — — J-1 2 67 288s 288C 2875 287c 2865 286C 2855 285C RIVER RES - J STA.2+95 v� ti / / V / I 284 -105 -90 -75 -60 -45 -30 -15 0 15 30 45 60 75 90 105 120 135 - ,� 7+00 28s 288C 2875 287C 2865 286C 2855 285' 2845-135-120 105 -90 -75 -60 -45 -30 -15 0 15 30 45 60 75 90 105 120 135 150 165 180 195 \ I II II II �I I I I JJ z?�o f tz -.--�-- l7 �aw f1 j � C4 tip ��ptillorl I pAI 4, LEGEND EXISTING GROUND — PROPOSED GRADE a O v v Ln bA s� 11 m o°ao� 0+55 -iU -lb U 1S iU - A PROPOSED START UT1 RESTORATION STA.0+52 / �zl 1L t t / \ 1 I \ t 2865 START PROPOSED— _ RIVER RESTORATION— __ ,--- l\ — — ` — — STA.2+95 ;3) DOGWOOD ROAD," 0+65 -iU -lb U 1S iU 0+75 -iU -1S U 1S iU 0+90 -3U -lb U 1S iU 1+00 0' 30' 60' 90' (HORIZONTAL) LEGEND EXISTING GROUND PROPOSED GRADE 1+ 22 -3U -lb U 1S iU Z y o �W oU�Fi. alW �z�a I-yZ �QE"a w W `0 M M 0 E s 2875 2870 2865 2860 2855 2850 OpO% ' _ "f!J AW 5 Jo - - - - y d - _ ;/' o i / I I ROCK BERM COFFER DAM, - - - ROCK BERM PHASE 1 / a MIN ELEV - 2064.0 w - /" - I WOOD MAT CROSSING, , (BASE FLOW 2061.8) �� XSSTA. 4+00 20' MIN SPAN, LOW � _ DURING LATER PART OF PHASE, RELOCATE / \ - ,�y CHORD 2064.0 , ROCK TO BANK OF RESTORED RIVER 2870 CHANNEL (AS SHOWN) - SEE DETAILED / /6 / ��/r I �'15�- , v 0-( DIVERSION SEQUENCE TEXT.�S O ' �ti r 7 7 m LL m `OCLIr y 10 PLACE MATERIAL HERE TO FORM PROPOSED i BANKFULL BENCH GEOMETRY, SEE PLAN -PROFILE AND SECTION GRADING SHEETS 2865 r r - BACK CHANNEL, 2865 -I UP GRADIENT OF pfl� 0 REMOVE LARGE PROPOSED PR �POS/ED BANKFULL ULX BOULDER \�`-`2+00 RESTORATION L EXISTINGBAR 301 10, OPTION TO REMC �860- - -_7-'.�� LEAVE LARGER BOL 01 / pd --2865-- AT ONSET OF WORK, FLOW TO REMAIN IN m-� re PROPOSED _ EXISTING CHANNEL WITH ROCK CHECK CHANNEL PROPOSED - DAMS (CD) SETUP TO RESTRICT FLOW - - _ TOE (TYP) BANKFULL _ - ACCESS TO BACK CHANNEL ON FAR LEFT - WATER SURFACE UPSTREAM OF DAM - 2061.6 L SURVEYED EXISTING GROUND -Y I I 1 11 1 WATER SURFACE DOWNSTREAM OF DAM - 2058.E 2875 2870 2865 2860 2855 2850 2845 T 1 1 1 1 1 1 1 1 1 1 1 1 1+ 2845 0+00 0+50 1+00 1+38 DIVERSION PROFILE AT STA. 6+05 PHASE 1 ta- START PHASE 1DIVERSION FLOW (EXISTING ALIGNMENT) WITH PROFILE BELOW, USE ROCK BERM ON RIGHT SIDE OF DIVERSION CHANNEL TO SERVE AS COFFER DAM FOR ROCK HARVESTING AREA XS STA. 6+05, SEE SHT. 4.4 FOR = PHASE INFORMATION- �vU � I / MARK TREES TO BE CLEARED IN FIELD _ TO ALLOW FOR FILL PLACEMENT PLAN VIEW - PHASE 1 Phase 1: - -J f END RIVER RESTORATION (SEE PLAN -PROFILE SHEETS, -- _ MINIMAL WORK IN POOL "- DOWNSTREAM OF DAM) vv - — � 00 to SECONDARY ROCK HARVESTING AREA J/00 I PRIMARY ROCK HARVESTING AREA - O 0 Establish construction entrance and preliminary ESC. 0' 30' 60' 90, (HORIZONTAL) Access river from upstream point. Travel along existing gravel bars and establish temporary crossing to rocky bar and rock harvesting area. Harvest rock material to an average depth of 3 feet within the designated area (to the right and immediately upstream and downstream of the dam). Haul rock to upstream river restoration reach and establish a linear rock berm along the approximate proposed top of bank (preliminary configuration shown in plan view), approximate STA 3+40 to 4+10. Working from the land side of rock berm, excavate the near bank down to 2-3' below proposed channel toe. Push rock into excavation to form and shape new riverbank at the proposed grading elevations. At a minimum, the lower half of the bank HAUL ROAD ON EXISTING GRAVEL BAR shall be rocky. The remainder of the bank will ultimately be matted, including the bankfull bench and terrace slope. Apply INITIAL ROCK BERM EXISTING GROUND matting once construction use for Phase 1 access is complete. (This effort should avoid disturbing base flow of river until near -final configuration of bank is complete - this should be possible using the existing mid -channel gravel bar as a barrier to 2875 2875 river flowing into the back channel). 2870 2870 2865 2865 I Approximately 1/3 - 1/2 CY of harvested rock will be imported into the reach per linear foot of river channel to build the 2860 I z86o proposed boulder bank. 2855 2855 0+00 1+00 1+10 Between station 2+95 and 4+00, the sediment to be removed from the channel will nearly balance with the bank and bench PROPOSED GRADE J!7 construction. Approximately 260 CY will be removed from the channel and approximately 170 CY will be required to BACK CHANNEL- EXCAVATES' BELOW PROPOSED construct the banks and bench up to proposed grade. The 30-50 CY Of rock from the harvesting area will result in a net USE FOR WASTE GRADE AND MOVE ROCK FROM INITIAL surplus of approximately 130 CY. This material should be staged on the bankfull bench for use during Phase 3 backfill of the FILL AS NEEDED ROCK BERM TO STABILIZE PROPOSED LEFT TOE AND BANK left side of the back channel. Alternatively, two optional proposed waste areas are available in the laydown area and just downstream of the top of UT1, both alongside Old Shulls Mill Road. Collectively, they can take approx. 420 CY of material. Material may also be relocated to PHAROCK BERM PROFILE SEATSTA.4+0o the rock harvesting area to displace the removed rock volume. s XS STA. 6+05el i _r -�-���_�_ �_�-� �� �/ice /� � �•�7�\ ���'_ ��� t ---------------- EXTEND ROCK BERM COFFER DAM, MIN ELEV = 2064.0 (BASE FLOW 2061.8) XS STA. 4+002970 i t WOOD MAT CROSSING, 0�\ ZU\\ Il/Ili/1/rfll/ll\1 20' MIN SPAN, LOW CHORD 2064.0-���AA\�Ij��j�\\AAA\�AA1A �F ' I � � I p� END PHASE 2 DIVERSION 2+88 " THROUGH DAM END RIVER RESTORATION SEE SHT. 4.4 FOR I PHASE INFORMATION - - L0� )1� }1 REMO�ECHECKDAMANDy� " r� j e-�+�0--, ALLOW FLOW THROUGH /- - v ��- _t_1- .�� (E�ISTING)BACK CHANNEL, SEE--- �V'` DIVERSION PROFILE BELOWI- / - 1� 2P THIS AR EA DRY DURING / PHASE 2 EXCEPT FOR - '- -2870j-- - SEEPAGE _ _ 1 UP GRADIENT OF 2 pfl 00 2865 - - - 8 �� / J-I-- � 28 5 START RIVER - - PROPOSED BANKFULL `2+06 RESTORATION _ COI y� �-- OPTION TO REMOVE OR �860- --- _ LEAVELARGERBOULDERS - �� - 00 - BASED ON NEED - 2865-� e---- ie -'a PROPOSED e INSTALL ACROSS CHANNEL " CHANNEL PROPOSED LL ROCK BERM COFFER TOE (TYP) BANKFULL 2875 2870 2865 2860 2855 2850 2845 0+00 - WATER SURFACE - UPSTREAM OF DAM - 2061.6-2062.5 PLAN VIEW - PHASE 2 2875 2870 2865 2860 2855 DAM — I \ EXISTING GROUND WATER SURFACE DOWNSTREAM OF DAM - 2058.5 0+50 1+00 1+50 2+00 DIVERSION PROFILE - PHASE 2 2+50 2850 -+ 2845 2+88 ?J+00, REMOVE DAM TO _1 HERE DURING PHASE 2 \ LOD LO� D O ��—�-- I AVAA �� I I11 I /€ \ \ �-2860� — o (SEE PLAN PROFILE SHEETS, -- _-, MINIMAL WORK IN POOL - - - DOWNSTREAM OF DAM) - - ' — LOD / PHASE 2 INCLUDES REMOVAL OF RIGHT HALF - OF DAM, COMPLETION OF REMAINING ROCK o HARVESTING, AND USE OF HARVESTING AREA TO DISPOSE OF EXCESS FILL AND CAP WITH RIVER STONE AND/OR MATTING �S - 0' 30' 60' 90, (HORIZONTAL) W Phase 2: Reconfigure the diversion of base flow from the existing right side of the river (Phase 1) to the left side of the lower bar (Phase 2). To accomplish this, use the existing cut through between the bars. At the downstream limits of the lower bar reconfigure the rock berms used to coffer dam off the rock harvesting area and extend to create a rock berm that separates the flow from the entire right low flow channel. Grade the river channel down to proposed grade and relocate excess material to the rock harvesting area to construct the embankment grading shown on the plans. During this phase, also remove the right half of the dam and start grading the left terrace and removing the upper portion of the dam river left. Use a temporary wood mat crossing over the low flow diversion alignment to bring soil material to the rock harvesting area to mix with sand and gravel from the channel excavation. Stage sufficient rock and gravel along the rock berm to backfill the landward side of the berm where the proposed river left bankfull bench is to be located. Close out activities on the right side of the river in the rock harvesting and sediment waste area. Cap sand and small gravel with larger on -site rock. Mat the proposed embankment slope which is proposed at a 3:1 slope. On river left, stabilize bare areas at the end of each working day; dispose of waste concrete a minimum of 2-3' below proposed grade and a minimum of 15' from the proposed base flow channel. The net quantity of cut material in the rock harvesting area is approximately 550 CY, mostly from the rocky bar area where the river channel is to be relocated during final grading. The net quantity of fill in the rock harvesting area is approximately 950 CY. Fill material is tucked against the hillslope and well protected from river flow. Fill material placed in this area should be placed from downstream to upstream. In the event of an anticipated large flow, the rock berm should be elevated by 1-2' as directed to prevent overtopping. I OPTIONAL FILL AREA, 155 CY EXCAVATE TRENCH AND PLACE WOODY BRUSH TOE MATERIAL BELOW RIFFLE GRADE. CONSTRUCT BANK WITH ROCKY MATERIAL SAME AS OTHER LOCATIONS. / f C i� OPTIONAL FILL AREA, %iir 270 CY _- v t XS STA. 4+00 � t a 2 7p CONSTRUCT UT1 - - O AND TIE-IN _ STAGE MATERIAL DURING PHASE 1 OR 2 TO PLACE INTO LEFT BACK O� i rre J / CHANNEL (PHASE 2 DIVERSION AREA) `�- "/ �`�' o AND BRING UP TO GRADE 87 .� oo ti��� 2860 ay5 i --- _2 _ --� _ -- - BACK CHANNEL, 2g60 -2865 /_ P P GRADIENT OF �\ START RIVER _ R FULL - - - _ 2+oG RESTORATION i _ 01 (101 - 2865 _ PROPOSED AT BEGINNING OF PHASE 3, - CHANNEL PROPOSED REMOVE ROCK BERM FROM PHASE 2 AND DIVERT BASE TOE (TYP) gANKFULL FLOW INTO NEW CHANNEL 2875 2870 2865 PROPOSED GROUND, POST-PROJET WATER SURFACE TO FOLLOW 2860 2855 2850 0+00 WATER SURFACE UPSTREAM OF DAM (PRE -REMOVAL), 2061.6-2062.0' I - - I I EXISTING GROUND 0+50 2875 2870 2865 c<y XS STA. 6+05, THIS SIDE OF CHANNEL IS DRY DURING PHASE 3 SEE SHT. 4.4 FOR ROCK PAD NEED TO BE BUILT UP ABOVE LEVEL OF PHASE INFORMATION DOWNSTREAM POOL AS WORKING PLATFORM REMOVE PROUD PORTION OF ABUTMENT DOWN TO GRADE GRADING MODEL ELEVATIONS \OR\ `ADJACENT 71 III�IIIVA\') i . REMOVE REMAINDER OF DAM; UTILIZE / / O CO M P RESSO R AS N ECESSARY TO R E M OVE FOUNDATION OF DAM TO BEDROCK ABOUT6-10'BELOWWATER SURFACE END RIVER RESTORATION -- -- ��� (SEE PLAN -PROFILE SHEETS, - - MINIMAL WORK IN POOL - 7 6+00 --�� � / / I 1 DOWNSTREAM OF DAM) /, �/r 1 PHASE 3 DIVERSION _OD ,�. START PHASE 3*e_, - / COMPLETE ALL DAM REMOVAL RIGHT DIVERSION ALONG p II OF THE PHASE 2 ROCK BERM AND FILL NEAR -FINAL ACTIVITIES IN ROCK HARVESTING AREA RESTORED CHANNEL 1 V PRIOR TO STARTING PHASE 3 4 OPTION TO REMOVE OR LEAVE LARGER BOULDERS - BASED ON NEED ROUTE UT1 THROUGH GAP IN ROCK BERM. DURING CONSTRUCTION UTILIZE PUMP AROUND TO PUMP BASE FLOW INTO MAIN CHANNEL DIVERSION PLAN VIEW - PHASE 3 2860 DOWNSTREAM BASE FLOW WATER SURFACE 2855 2850 1+00 1+24 DIVERSION PROFILE - PHASE 3 Phacp :t- � O p� o ` O 2860� o 0' 30' 60' 90, Q Z N o (HORIZONTAL) U d w W 0'j Z x�N Al0 �v I-yZ After grading to final elevations on right hand 2/3 of the channel and right bank and floodplain, remove the phase 2 rock berm from across the channel and divert flow into the new channel. Commence with finalizing left an woody structures, rocky an grading and banll bench construction in areas that have not been finalized. Material stockpiled on the bench during Phase 1 will be used to backfill the left channel up to proposed bench grade in the portion used for phase 2 base flow diversion. Rocky material will be mixed with gravel and sand to form a bed material mixture for UT1 channel reconstruction according to the cascading riffle detail on Sheet 7.1. For UT1, bed material shall be placed between grade control structures placed according to detail. Below station 5+00, reconfigure the rock berm material to form the new left channel bank and grade to the left bank to the specified grade and slope. The proposed left bank benching tapers off around 6+00 and below that point the left bank is sloped at 3:1 to tie in on the existing terrace at 7+07. Excess material from the terrace may be placed in either of the two left bank optional fill areas. Any remaining excess material should be hauled offsite. Re -naturalize haul roads and haul any excess soil offsite. Loosen material to depth of excavator bucket to mechanically fluff. Seed and straw. C'� OPTIONAL WASTE AREA, _ =1\ \c - s r 0 CONSTRUCTION ENTRANCE -ar - --� R-�- - 9T) _ �• y - IF USED, SAME DAY _ _ AND STRAW � i;~/ � - - _ _ __ _ -_- - STABILIZE WITH SEED --_ __-- �--'' �J � / l I � .✓ � ,�' �� -_-_-ice% - -- � - --- --_ - __ ��-- - 'Zz r d) .d STAGING AREA DAM REMNANTS Q• SORTING (METAL AND CONCRETE) / ^\` ( ` a•s - i� ^ =-0 ,�\ �: \ i - -OPTIONAL WASTE AREAS, IF USED, SAME DAY STABILIZE WITH SEED AND STRAW, - - PUMP AROUND UTl MAT ANY SLOPES STEEPER THAN 4:1 1a T - / i ;� - A - I /-V AI I I I( \ DURING CHANNEL T T 1 I \ WORK / // p I 1 l v A �� i•;ON - - - - 1� 0P0 - • v�J I s� *� it l�� / "� - _///� �� II\ 1V� \ �I I i ���OP �....„.,,�J L S\A ULL cl)m i _ r• T T VA\ �. I _ r/ V I �� w e z J �• PROPOSED START '� > ''�� 4•` i �•� UTIRESTORATIONi�/���.� A • /%//'� �� �� /--�'� \\ \ ���/�/=-I� ) - y�b��dd o ¢�O� ns STA. 0+52 ♦ p _ v \ y l i �� ,+ • _ }� // / 'la .iv c -- IIN/� v END PROPOSED D END 1 ♦♦ ♦��p • RIVER RESTORATION PROPOSED � l 4s¢ $ per• - UTl RESTOR/ • \ \\ / _ -"���' ��� �A � @• O � � l� (�@ �=" �� \ vA A III � /� i T A ( Ji 2� Il/ � �- • � � _ /// ��- @ vw F / �7+00,�� _ _ a 1 ��// ��� �� �� �• O ���� �� ��� VAV lav /� i� �— i� — --�\\ \ I)AA 7i--� caw) /• jC j j(ds�• ��/ — j � �1 ` — _- — \ \� /— 855_' 1 � � lll/ �`�--1�- � �� �/ / ��' �� @• ice'/1 ���� ,�� - �� I 1 I / �i v /--- I �,-_-- -- � �_ INSTALL SILT FENCE/ WATTLES - -- -, \V _ r WHEN HAUL ROAD IS NOT IN USE - i n \ / / ! V Iry • -- - � `--� �n �• �/ice ,- _ � / � � �� � � / ��6 � -__ ��6 � � .,_, ,� o - - - U �kLOD -- - ---- /i - -- i vAPPLY MATTINGTOATLEAST o _--- �� �; � --_ �-k---_ a ���' � — � r � � /i'/ i � / — __�_� ( � � 2865' CONTOUR, AND TO ALL z � SLOPES STEEPER THAN �✓ APPLY MATTING TO ALL BANK, --''� BENCH AND TERRACE SLOPE 2860 WORK ON LEFT SIDE OF RIVER -� i — / i,; /V v� A J /v• I --I r U i TOUCH UP SLOPE AFTER ACCESS 864 2+ 00 AS NEEDED, TOP DRESS WITH % 2 - o - v k� TEMPORARY SEED AND STRAW +p0 ��I` /��VAVAVAAI IAA\\ _ -- 60— _---' r///, REFER TO SHEETS 4.1-4.4 FOR PHASING AND SEQUENCING OF / � � -��%' � �' /- �� WORK, INCLUDING CROSSINGS AND��� Ali V A v 28 / -- 860"- _ - ;' - �� ����/ /' ��� RIVER BASE FLOW DIVERSION -0- WHERE � i �-OOY •a' � � v --_ e --__ ---- - - - -� '_ - -' ati-_v ROCK IS NOT PRESENT, APPLY � j _ � j% ' \ �_ ? �\� START PROPOSED - MATTING AND SURFACE APPLY a_ - - _ - - - IVERRESTORATION BOULDERS_LIMITS OF DISTURBANCE \ / _- COARSE STONE AND _ - -�! _ T — _ — 'TROUT BUFFER DOGWOOD ROAD ~� > � ��, _ `—\ `� "-L � 007 -- --- -- � �k, z NOTES: 1. ALL BANK RESTORATION AND RIVER WORK SHALL USE SAME DAY STABILIZATION WITH COIR MATTING 3 0' 20' 40' 60' 2. ROCKY AND GRAVELLY MATERIAL FROM CHANNEL DOES NOT REQUIRE STABILIZATION UNLESS IT IS ANTICIPATED TO BE SUBJECT TO HEAVY FLOW FROM STORM EVENTS (HORIZONTAL) g 3. WORK IN THE WET SHALL ONLY BE FOR LIMITED PHASES AS DESCRIBED IN PHASING AND SEQUENCING. THE MAJORITY OF THE WORK WILL BE PERFORMED IN THE DRY WITH DIVERSIONS SET UP TO ROUTE RIVER BASE FLOW AROUND THE ACTIVE WORK AREA. g T 4. IF DEWATERING IS NECESSARY FROM ACTIVE WORK AREA TO PUMP GROUNDWATER, ROUTE FLOW THROUGH A FILTER BAG ACCORDING TO x PUMP AROUND DETAIL. 3 a c b vx 01 POOL ROCK DROPS, SEE DETAIL, VARY INCORPORATE WOOD WHERE AVAILABLE (TYP) ' A' FLOW ELEVATION POINT N CONFIGURATIONS AS SHOWN 0 e VARIES BY STEP CASCADING MICROPOOL(TYP)- INCORPORATE O O i O ARRANGEMENT 0 RIFFLE, SEE DETAIL INTO CASCADING RIFFLES k SEE PROFILE FOR ELEVATION Q 0 O A z •g��o E e BACKFILL EQUAL RIFFLANGLED DRO IRREGULAR DRO 0 MIX FROM PROJECT ARCHED DRO Arched 0 a i F z RIFFLE TABLE Q as V aZ POOL `� W LENGTH Z BOTTOM WIDTH (TYPICAL SECTIONS) (VARIES) ANCHOR BOULDERS 2' INTO Angled POOL SPACING (PS) °y° 2-4" BANK (HEADERS AND FOOTERS), BOTH SIDES PS -A PS-B PS-C PS-D 4 CASCADE -POOL THALWEG ON UPSTREAM 1/3 OF SEQUENCES %� ANGLED STEP (SIMILAR TO SINGLE �annnq ARM VANE). e.g. SEE LOG STEP _ NONWOVEN i ��\� i �\\\ BACKFILL DETAIL SECTIONA-A' 0����J'"'„'Nyb���4 FILTER FABRIC \��!!\\ �\ \\i� DEPTH 18" $� o`er m - BOULDER eQLAI, MINIMUM HEADER BOULDER BY 3' LENGTHM g m MATCH PROPOSED MIDDLE OF ROCK STEP 2-4" FOOTER BOULDER ular , o O, GRADE (BANKFULL- _ BASE FLOW LOWER THAN BANKS OF ROCK STEP Section A -A' \� [ ���•�` Dmax) TO WITHIN -0.2 \\ - TO +0.1' AT HEAD OF \DROPS OF UP TO 0.5' MAY BE EACH CASCADE USED AT POOL ENTRANCES t jPOOL !!\ DOUBLE THAL G OR VARIABLE THALWEG Cascade /Step -Pool Spacing Table SEE DE I AiL 3/6.1 FOR CASCADE CONSTRUCT iON PLACEMENT BETWEEN ROCK DROPS FOOTER OR CLASS ZNONWOVENI Species Name POOL SPACING (PS) PS -A PS-B PS-C PS-D SEQUENCE POOL CASCADE RANGE LENGTH A+B+C+D LENGTH SLOPE RANGE 1/2 SPLASH ROCK FILTER FABRIC Types of Step Configurations UT1 9-18' TBD TBD TBD TBD TBD 3-5' 10-16% NOTES: • CONTRACTOR MAY VARY POOL SPACING BUT SHALL COMPLETE SEQUENCES TOTALING TO SEQUENCE LENGTH PROVIDED IN TABLE UT1 - Cascading Riffle -Pool Sequence 7.1 Not to Scale 1 V111� View r2--, UT1 - Rock Drop 7 1 Not to Scale NOTES: • DROP TYPE MAY BE VARIED IN THE FIELD BY DESIGNER. IN GENERAL, VARY DROP TYPE OFTEN WITH ROUGHLY EQUAL NUMBERS OF EACH DROP TYPE WITHIN A REACH. • DETAIL TO BE APPLIED IN CONJUNCTION WITH CASCADING RIFFLE -POOL SEQUENCE DETAIL. • SECTION VIEWS REPRESENT ARCHED ROCK DROP VARIATION. MODIFY SECTIONS AS NEEDED TO ACCOMMODATE OTHER VARIATIONS. • BOULDER MINIMUM SIZE 2x2x1' '~' C13 r- •--+ U O a'�+ i) z 6" MIN. OVERLAB IN DIMENSIONS MAY VARY BY MANUFACTURER BUT DOWNSTREAM DIRECTION Q AT MAP ENDS SHALL BE SUBJECT TO DE SIGNER APPROVAL. SHALL WOODEN OF �4� ^(CS STAKE (TYP) TOP BANK RESIST BREAKAGE PER SPEC. I--1 0 U 1.25' 3' MAX. %� \ SPACING 0.4' \ t/J oo TOE STAKE TOE OF SLOPE ti Plan View 1 L4 N 0.6" COIR EROSION CONTROL TOP OF BANK COIR MATTING MATTING (TYP) SECURE MATTING IN Toe Stake Wooden Stake 6" DEEP TRENCH OR TOE STAKE WOODEN STAKE TYP SEE SPECIAL SEEDING NOTE NOTES: /INSTALLATION ANCHOR COIR WITH LARGE ROCK \ /\\ \\� �CCHANNELBED TOE OF SLOPEAND/OR \ TOE STAKES PER USE 700g/mZ DENSITY COIR MATTING. /\/\/ /1. / T ' MATTING DETAIL \ \ �� �� 2. SEED AND MULCH SLOPES PRIOR TO MATTING INSTALLATION. HARVESTED ONSITE BOULDERS < �AA�VA/VA��� i���i i i �� i 3. TOE STAKES TO BE USED AT TOP AND TOE. 12" WOODEN TAKES u SIZE RANGE 1x1x1.5 TO 4x3x2 OR /�/ Section MAY BE USED ON SLOPE FACES. AS APPROVED BY DESIGNER KEY IN BELOW SECUa MATTING IN View MAINTENANCE NOTES: A CHANNEL BED 2.5' MIN. 6" DEEP TRENCHROR OE TAKE 1. ALL EROSION CONTROL MATTING SHOULD BE INSPECTED AT LEAST z Section A -A' ONCE WEEKLY OR AFTER 0.25" OF PRECIPITATION WITHIN 24 2. HOURS. ANY MATTING FAILURES SHOULD BE REPAIRED WITHIN 24 HOURS. o c .. s 3. TENTING (EROSION OCCURRING UNDERNEATH INSTALLED e MATTING) WILL REQUIRE PEELING BACK MATTING, REPAIRING ANY A RILLS, AND REAPPLYING THE MATTING. `\ g v r3--� Boulder Bank Protection r Erosion Control Matting m x\Z-_V Not to Scale 7.1 Not to Scale PUBLIC ROAD CLASS A STONE OR EQUAL, 8" DEPTH INSTALLATION NOTES: 1. PROVIDE TURNING RADIUS SUFFICIENTTO ACCOMMODATE LARGE TRUCKS. 2. LOCATE CONSTRUCTION ENTRANCE AT ALL POINTS OF INGRESS AND EGRESS UNTIL SITE IS STABILIZED. 3. PLACE FILTER FABRIC BENEATH STONE. 4. USE CLASS A STONE OR OTHER COARSE AGGREGATE APPROVED BY THE ENGINEER. 5. MUST BE MAINTAINED IN ACONDITION WHICH WILL PREVENT TRACKING OR DIRECT FLOW OF MUD ONTO STREETS. PERIODIC TOP DRESSING WITH STONE WILL BE NECESSARY. 6. REMOVE STONE UPON COMPLETION UNLESS DIRECTED OTHERWISE. MAINTENANCE NOTES: 1. ALL CONSTRUCTION ENTRANCES SHOULD BE INSPECTED AT LEAST ONCE WEEKLY OR AFTER 0.25" OF PRECIPITATION WITHIN 24 HOURS. 2. EXCESSIVE AMOUNTS OF SEDIMENT SHOULD BE REMOVED FROM THE CONSTRUCTION ENTRANCE IMMEDIATELY. 3. ANY SEDIMENT TRACKED ONTO PUBLIC ROADS SHOULD BE CLEANED IMMEDIATELY AND THE SOURCE OF THE SEDIMENT ADDRESSED. MATERIAL SPECIFICATIONS PHYSICAL PROPERTY TESTS REQUIREMENTS MATERIAL N/A POLYETHYLENE RECOMENDED COLOR N/A "INTERNATIONAL ORANGE" TENSILE YIELD ASTM D638 AVE. 2000 LBS. PER 4' WIDE ULTIMATE TENSILE STRENGTH ASTM D638 AVE. 2900 LBS. PER 4' WIDE ELONGATION AT BREAK (%) ASTM D638 GREATER THAN 1000% CHEMICAL RESISTANCE N/A INERT TO MOST CHEMICALS AND ACIDS 6' MAX. WITH WIRE ATTACH SAFETY FENCE TO METAL POSTS USING METAL WIRE TIES ORANGE SAFTY FENCE "T" OR "U" POST DRIVEN MINIMUM OF 18" INTO GROUND ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Z a II II II II u u I Z i1 Construction Entrance —sAF— z Safe Fence oo 7-2 Not to Scale V �•2 Not to Scale ONIMee■ _... ■iii■ DENSELY PACK BRUSH, WOODY DEBRIS AND SOIL EROSION CONTROL MATTING IN BETWEEN BASE LOGS O�gPN l�Pl BASE LOGS PERPENDICULAR TO FLOW f BASE LOGS PARALLEL TO FLOW ,SOP QQ�I,�yPI OF 5v oil �O Plan View BRUSH MATERIAL TO BE INSTALLED PROTRUDING 6-18" n Brush Toe 7.2 Not to Scale ELEV. V ABOVE DOWNSTREAM RIFFLE INVERT BASE LOG 4"-6" DIAMETER JL� ELEV. 6" BELOW 12' MIN POOL DEPTH WIDTH PER TYPICAL SECTIONS )SION CONTROL MATTING TIE TO BANKFULL ELEVATION WITH LIGHTLY COMPACTED SOIL WRAPPED IN EROSION CONTROL MATTING -V DENSELY COMPACTED SOIL LIFT ON BRUSH WRAPPED IN EROSION CONTROL MATTING TO OF BANK -FILTER FABRIC /DENSELY PACKED BRUSH, WOODY DEBRIS AND����%C 0 < BACKFILL 6-12" DIAMETER NATIVE SOIL Section A -A' LL) r v Q NOTES: • LARGE STREAMS INCLUDE ALL OAK HILL DAIRY AND UT1 REACHES • OVEREXCAVATE 3' OUTSIDE OF TOP OF BANK (BANKFULL). • INSTALL BASE LOGS PARALLEL TO FLOW AT TOE OF SLOPE. DIAMETER 6"-12". • INSTALL BASE LOGS PERPENDICULAR TO FLOW AT INTERVALS ALONG BANK, RESTING ON TOP OF PARALLEL BASE LOGS. BASE LOGS SHALL BE 6"-12" DIAMETER. N o N • INSTALL A DENSE LAYER OF BRUSH/WOODY DEBRIS, WHICH SHALL CONSIST OF SMALL BRANCHES AND e ROOTS COLLECTED ON -SITE AND SOIL TO FILL ANY VOID SPACE. LIGHTLY COMPACT BRUSH/WOODY DEBRIS LAYER. L\ • BRUSH SHOULD BE ALIGNED SO STEMS ARE ROUGHLY PARALLEL AND IS INSTALLED POINTING SLIGHTLY UPSTREAM. • INSTALL FILTER FABRIC OVER BRUSH/WOODY DEBRIS. • INSTALL EARTH BACKFILL OVER BRUSH/WOODY LAYER ACCORDING TO TYPICAL SECTION DIMENSIONS. a z s • SEED, MULCH AND INSTALL EROSION CONTROL MATTING AND BANK STABILIZATION PER PLANS. 3 s w Z F�2 Z a 010 u LQ 2� SUPPLEMENT WITH SOIL FROM ON- OR -SITE AS NECESSARY 2x CONTAINER WIDTH /—T'� Containerized Planting 7.3 Not to Scale NOTE: FOR CONTAINER PLANTS, EVALUATE SITE PLANTING CONDITIONS AND PROVIDE SOIL CONDITIONER WHERE SITE IS TOO ROCKY TO SUCCESSFULLY ESTABLISH PLANTS WITHOUT AMENDMENT. S QPC\NG FpR Q\yN�\NGBAN KFU LL TOP OF BANK LIVESTAKE 14 OFF EROSION CONTROL MATTING BASE FLOW EDGE OF (SEE DETAIL) WATER AS DIRECTED LIVE STAKE FFER PLANTING HERBACEOUS PLUG (TYP) SEE PLANTING TABLES FOR SPACING TOE OFSLOPE LIVE STAKE TYP Section View - Large Streams 1/2" TO 2" 2' TO 3' LIVE STAKE DIAMETER TAPERED AT BOTTOM T ixTo Cfalen P)\ TOP OF BANK\ d A � Sk a A A 6 TOE OF Plan View NOTES: 1. REFER TO SPECIFICATIONS FOR PROPER STORAGE, HANDLING AND INSTALLATION. 2. FORM PILOT HOLE IN HARD SOIL OR STONY CONDITIONS TO PREVENT DAMAGE TO LIVE STAKES. 3. LIVE STAKES TO BE PLANTED IN AREAS AS SHOWN ON PLANS AND DIRECTED BY THE ENGINEER. 4. INSTALL DORMANT PRIOR TO LEAF OUT. DEPICTED CONDITION WITH LEAVES NOT REPRESENTATIVE OF STAKES AT TIME OF INSTALLATION. 5. INSTALL STAKES MINIMUM OF 18" INTO GROUND. 6. TRIM OFF DAMAGED/FRAYED STAKE TOPS. 7. REFER TO PLANTING TABLES IN PLANSET FOR SPACING OF PLUGS AND LIVESTAKES. i31 Live Staking & Herbaceous Plugs 7.3 Not to Scale BUFFER WIDTH VARIES SPACING PER PLANTING PLAN O INSERTTHE DIBBLE, OR SHOVEL, STRAIGHT DOWN INTO THE SOIL TO THE FULL DEPTH OF THE BLADE AND PULL BACK ON THE HANDLE TO OPEN THE PLANTING HOLE. (DO NOT ROCK THE SHOVEL BACK AND FORTH AS THIS CAUSES SOIL IN THE PLANTING HOLE TO BE COMPACTED, INHIBITING ROOT GROWTH. USE A MINIMUM OF 2 STAKES ON UPSLOPE SIDE ----------- FLOW ----------- __-PLUG (TYP) \ \ WATTLE BAREROOT OR CONTAINER BANKFULL PLANTINGS LIVESTAKES RESTORED EL REMOVE THE DIBBLE, OR SHOVEL, AND PUSH THE SEEDLING ROOTS DEEP INTO THE PLANTING HOLE. PULL THE SEEDLING BACK UP TO THE CORRECT PLANTING DEPTH (THE ROOT COLLAR SHOULD BE 1 TO 3 INCHES BELOW THE SOILSURFACE). GENTLY SHAKE THE SEEDLING TO ALLOW THE ROOTS TO STRAIGHTEN OUT. DO NOT TWIST OR SPIN THE SEEDLING OR LEAVE THE ROOTS J-ROOTED. Plan View INSERTTHE DIBBLE, OR SHOVEL, SEVERAL INCHES IN FRONT OF THE SEEDLING AND PUSH THE BLADE HALFWAY INTO THE SOIL. TWIST AND PUSH THE HANDLE FORWARD TO CLOSE THE TOP OF THE SLIT TO HOLD THE SEEDLING IN PLACE. PLANTING BAR SHALL HAVE A BLADE WITH ATRIANGULAR CROSS-SECTION, AND SHALL BE 12 INCHES LONG, 4 INCHES WIDE AND 1 INCH THICK AT CENTER. ALL ROOTS SHALL BE PRUNED TO AN APPORIATE LENGTH TO PREVENT J-ROOTI NG. NOTES: 1. ALL PLANTS SHALL BE PROPERLY HANDLED PRIOR TO INSTALLATION TO INSURE SURVIVAL. O O 6 Tj iNi i PUSH THE DIBBLE, OR PULL BACK ON THE REMOVE THE DIBBLE, OR SHOVEL, DOWN TO HANDLE TO CLOSE THE SHOVEL, AND CLOSE AND THE FULL DEPTH OF BOTTOM OF THE FIRM UP THE OPENING THE BLADE. PLANTING HOLD. THEN WITH YOUR HEEL. BE PUSH FORWARD TO CLOSE CAREFUL TO AVOID THE TOP, ELIMINATING AIR DAMAGING THE SEEDLING. POCKETS AROUND THE ROOT. /'-2-'N Bare Root Planting 7.3 Not to Scale B USE A MINIMUM OF 4 STAKES ON DOWNSLOPE SIDE B' MIN. 2 STAKES ON MINIMUM 4 STAKES ON ----- UPSLOPE� DOWNSLOPE D DOWNSLOPE -lll,.,I11.:1L1 1L1, .1Ll,;.l I I_I I1— MA IN Section B-B' MATTING NOTES: 1. USE A MINIMUM 12INCH DIAMETER WATTLE 2. WATTLES SHALL BE FILLED WITH STRAW OR OTHER APPROVED MATERIAL Q zo z �e �w az z x�N �lz �QHa �W m �r-_ w Ln M �o . f ...­� r v Q 3. USE 24 INCH LONG WOODEN STAKES WITH A 2"X2" NOMINAL CROSS SECTION 4. INSTALL WATTLES TO HEIGHT OF SLOPE SO FLOW WILL NOT WASH AROUND WATTLE AND SCOUR SLOPES z 5. SPACING FOR WATTLES SHALL BE DETERMINED BY THE ENGINEER. 6. FOR USE OF WATTLE IN A DITCH, GRADE OF DITCH MUST BE <2.5%. 7. WATTLES SHALL BE INSPECTED AFTER AN 1/2" OR GREATER RAINFALL EVENT. e F M a Straw Wattles = r 7.3 Not to Scale 3 P a c & IMPERVIOUS DIKE HIGH STRENGTH (SEE INSET DIKE DOUBLE STITCHED RADIUS OF TREE PROTECTION "J" TYPE SEAMS. _ BARRIER PER PLANS. / INTAKE HOSE A ) BAG PLACED ON �_�" 1 �� 0 PUMP AGGREGATED OR STRAW. EXISTING TERRAIN DEWATERING BAG Q SEWN IN SPOUT STREAM BED �- z 0 HIGH STRENGTH STRAPPING �c 7 �� \� Q g U f o DEWATERING FOR HOLDING HOSE DISCHARGE HOSE BAG IN PLACE.WATER FLOW FROM PUMP 8" of CLASS B RIPRAP �� W 15' FILTER FABRIC � FLEXIBLE 15'to 20' DISCHARGE HOSE Inset "A" C Dewatering Bag —J� -� —� SAND BAG Plan View �� _� (24" X 12" X 6") _I 6' WOODEN OR METAL "T" POSTS ♦o�����nq� OR STONE. —� SHALL BE USED AS STANDARDS. ,pP IMPERVIOUS SHEETING STABILIZED OUTLET USING CLASS B SAFETY FENCE SHALL BE ATTACHED TO 6 m d �j 9 —� STANDARDS TO FORM BARRIER. ; RIPRAP TRENCHED INTO EXISTING tO GROUND A MINIMUM OF 6". SIZE AND REMOVE ALL BRUSH AND FLOW DEBRIS FROM INSIDE DRIPLINE. Ey od r' pm �p �,� LOCATION TO BE DETERMINED IN THE y FIELD BY THE ENGINEER. �'L �F FLEXIBLE DISCHARGE HOSE FROM �G'J SY Inset "B" PUMP AROUND PUMP HELD IN PLACE WITH SAND BAGS AS NEEDED. INTAKE HOSE \ IMPERVIOUS DIKE Impervious Dike DEWATERING \/ -�� (SEE INSET "B") PUMP iii 10' MIN. in NOTES: 1. ALL TREE PROTECTION BARRIERS SHALL BE REMOVED ° PRIOR TO CONTRACTOR DEMOBILIZATION. ° ' ' ' ' ' ' ' ' �' �' 2. SEE PLANS FOR LOCATION OF ALL TREE PROTECTION ° /�` BARRIERS. DISCHARGE HOSE 10' X 5' STABILIZED OUTLET FILTER FABRIC Inset "C" Section View DEWATERING BAG USING CLASS B RIPRAP AND Stabilized Outlet 4-j tt (SEE INSET "A") NCDOT TYPE 2 FILTER FABRIC. (SEE INSET "C") O O NOTES: 11-4 m Plan View 1 PumpAround Stem 1. PROVIDE STABILIZED OUTLET TOSTREAMBED. SAF 2 Tree Protection ,_, 7A Not to Scale 2. BAG ON FLAT GROUND OR STAKE AROUND IT TO 7.4 Not to Scale PREVENT IT ROLLING DOWNHILL. i-� MUD MATS O [x] SUPPORT LOG 8' MAX. WITH WIRE INSTALLATION NOTES: 12" 0 MIN. Section View XCLASS B (6' MAX. WITHOUT WIRE) OR BUILD UP TO STONE OR RIVER MATERIAL 1. USE WIRE A MINIUM OF 32" IN WIDTH AND MIDDLE AND VERTICAL SPECIFIED GRADE WITH A MAXIMUM 6" MESH SPACING. WIRES SHALL BE 121 WITH RIVER MATERIAL 2. USE FILTER FABRIC A MINIMUM OF 36" IN GAGE MIN. Z FILTER FABRIC � WIDTH AND FASTEN ADEQUATELY TO THE WIRES AS DIRECTED BY THE ENGINEER. 3. PROVIDE 5' STEEL POST OF THE TOP AND BOTTOM STRAND SELF -FASTENER ANGLE STEEL TYPE. ANGLE SHALL BE 10 GAUGE MIN. MUD MATS STEEL TYPE. STRAW WATTLE TO BE INSTALLED (TYP) MAINTENANCE NOTES: � LJ - - - SEE DETAIL 5, SHEET 5.6 WIRE 1. ALL SILT FENCE SHOULD BE INSPECTED AT FILTER FABRIC EXISTING GROUND NOTES: LEAST ONCE WEEKLY OR AFTER 0.25" OF N r PRECIPITATION WITHIN 24 HOURS. COMPACTED FILL O1� a TOP OF BANK (TYP) - 1. CONSTRUCT STREAM CROSSING WHEN FLOW IS AT NORMAL a o BASEFLOW. 2. TEARS IN THE FENCE, UNTRENCHED AREAS, _ OR OTHER FENCE FAILURES SHOULD BE 2. MINIMIZE CLEARING AND EXCAVATION OF STREAMBANKS. REPAIRED WITHIN 24 HOURS. DO NOT EXCAVATE CHANNEL BOTTOM. 3. SEDIMENTTRAPPED BEHIND SILT FENCE bo I r s TOE OF SLOPE (TYP) _ 3. INSTALL STREAM CROSSING PERPENDICULAR TO THE FLOW. SHOULD BE CAREFULLY REMOVED ONCE 1 I 4. MAINTAIN CROSSING SO THAT RUNOFF IN THE DEPTH REACHES 6'. 14„ II FLOW CONSTRUCTION ROAD DOES NOT ENTER EXISTING CHANNEL. EXTEND FABRIC �I 5. STABILIZE AN ACCESS RAMP OF CLASS B STONE TO THE EDGE INTO TRENCH -- - - OF THE MUD MAT. 6. CONTRACTOR SHALL DETERMINE AN APPROPRIATE RAMP a ANGLE ACCORDING TO EQUIPMENT UTILIZED. 7. CROSSINGS SHOULD BE MONITORED TO ASSURE CORRECT z FUNCTIONING OF MATS, LOOKING FOR ANY DEFECTS OR SUPPORTLOG STRUCTURAL PROBLEMS. 12" 0 MIN. 8. CROSSINGS COVERED IN SOIL OR DEBRIS SHOULD BE e V s' CLEANED AND THE MATERIALS REMOVED AND DISPOSED OF - IN A STABLE LOCATION. Plan View 2 Temporary Silt Fence or Sediment Barrier a Z 3 Temporary Stream Crossing -Timber P �' v " 7.4 Not to Scale 7.4 Not to Scale PART III SELF -INSPECTION, RECORDKEEPING AND REPORTING SECTION A: SELF -INSPECTION Self -inspections are required during normal business hours in accordance with the table below. When adverse weather or site conditions would cause the safety of the inspection personnel to be in jeopardy, the inspection may be delayed until the next business day on which it is safe to perform the inspection. In addition, when a storm event of equal to or greater than 1.0 inch occurs outside of normal business hours, the self -inspection shall be performed upon the commencement of the next business day. Any time when inspections were delayed shall be noted in the Inspection Record. Frequency Inspect (during normal Inspection records must include: business hours) (1) Rain gauge Daily Daily rainfall amounts. maintained in If no daily rain gauge observations are made during weekend or good working holiday periods, and no individual -day rainfall information is order available, record the cumulative rain measurement for those un- attended days (and this will determine if a site inspection is needed). Days on which no rainfall occurred shall be recorded as "zero." The permittee may use another rain -monitoring device approved by the Division. (2) E&SC At least once per 1. Identification of the measures inspected, Measures 7 calendar days 2. Date and time of the inspection, and within 24 3. Name of the person performing the inspection, hours of a rain 4. Indication of whether the measures were operating event? 1.0 inch in properly, 24 hours 5. Description of maintenance needs forthe measure, 6. Description, evidence, and date of corrective actions taken. (3) Stormwater At least once per 1. Identification of the discharge outfalls Inspected, discharge 7 calendar days 2. Date and time of the inspection, outfalls (SDOs) and within 24 3. Name of the person performing the inspection, hours of a rain 4. Evidence of indicators of stormwater pollution such as oil event? 1.0 inch in sheen, floating or suspended solids or discoloration, 24 hours 5. Indication of visible sediment leaving the site, 6. Description, evidence, and date of corrective actions taken. (4) Perimeter of At least once per If visible sedimentation is found outside site limits, then a record site 7 calendar days of the following shall be made: and within 24 1. Actions taken to clean up or stabilize the sediment that has left hours of a rain the site limits, event? 1.0 inch in 2. Description, evidence, and date of corrective actions taken, and 24 hours 3. An explanation as to the actions taken to control future releases. (5) Streams or At least once per If the stream or wetland has increased visible sedimentation or a wetlands onsite 7 calendar days stream has visible increased turbidity from the construction or offsite and within 24 activity, then a record of the following shall be made: (where hours of a rain 1. Description, evidence and date of corrective actlonstaken, and accessible) event? 1.0 inch in 2. Records of the required reports to the appropriate Division 24 hours Regional Office per Part III, Section C, Item (2)(a) ofthis permit of this permit. (6) Ground After each phase 1. The phase of grading (installation of perimeter E&SC stabilization of grading measures, clearing and grubbing, installation of storm measures drainage facilities, completion of all land -disturbing activity, construction or redevelopment, permanent ground cover). 2. Documentation that the required ground stabilization measures have been provided within the required timeframe or an assurance thatthey will be provided as soon as possible. NOTE: The rain inspection resets the required 7 calendar day inspection requirement. PART III SELF -INSPECTION, RECORDKEEPING AND REPORTING SECTION B: RECORDKEEPING 1. E&SC Plan Documentation The approved E&SC plan as well as any approved deviation shall be kept on the site. The approved E&SC plan must be kept up-to-date throughout the coverage under this permit. The following items pertaining to the E&SC plan shall be documented in the manner described: Item to Document Documentation Requirements (a) Each E&SC Measure has been installed Initial and date each E&SC Measure on a copy and does not significantly deviate from the of the approved E&SC Plan or complete, date locations, dimensions and relative elevations and sign an inspection report that lists each shown on the approved E&SC Plan. E&SC Measure shown on the approved E&SC Plan. This documentation is required upon the initial installation of the E&SC Measures or if the E&SC Measures are modified after initial installation. (b) A phase of grading has been completed. Initial and date a copy of the approved E&SC Plan or complete, date and sign an inspection report to indicate completion of the construction phase. (c) Ground cover is located and installed Initial and date a copy of the approved E&SC in accordance with the approved E&SC Plan or complete, date and sign an inspection Plan. report to indicate compliance with approved ground cover specifications. (d) The maintenance and repair Complete, date and sign an inspection report. requirements for all E&SC Measures have been performed. (e) Corrective actions have been taken Initial and date a copy of the approved E&SC to E&SC Measures. Plan or complete, date and sign an inspection report to indicate the completion of the corrective action. 2. Additional Documentation In addition to the E&SC Plan documents above, the following items shall be kept on the site and available for agency inspectors at all times during normal business hours, unless the Division provides a site -specific exemption based on unique site conditions that make this requirement not practical: (a) This general permit as well as the certificate of coverage, after it is received. (b) Records of inspections made during the previous 30 days. The permittee shall record the required observations on the Inspection Record Form provided by the Division or a similar inspection form that includes all the required elements. Use of electronically -available records in lieu of the required paper copies will be allowed if shown to provide equal access and utility as the hard -copy records. (c) All data used to complete the Notice of Intent and older inspection records shall be maintained for a period of three years after project completion and made available upon request. [40 CFR 122.41] PART III SELF -INSPECTION, RECORDKEEPING AND REPORTING SECTION C: REPORTING 1. Occurrences that must be reported Permittees shall report the following occurrences: (a) Visible sediment deposition in a stream or wetland. (b) Oil spills if: • They are 25 gallons or more, • They are less than 25 gallons but cannot be cleaned up within 24 hours, • They cause sheen on surface waters (regardless of volume), or • They are within 100 feet of surface waters (regardless of volume). (a) Releases of hazardous substances in excess of reportable quantities under Section 3110the Clean Water Act (Ref: 40 CFR 110.3 and 40 CFR 117.3) or Section 102 of CERCLA (Ref: 40 CFR 302.4) or G.S. 143-215.85. (b) Anticipated bypasses and unanticipated bypasses. (c) Noncompliance with the conditions of this permit that may endanger health or the environment. 2. Reporting Timeframes and Other Requirements After a permittee becomes aware of an occurrence that must be reported, he shall contact the appropriate Division regional office within the timeframes and in accordance with the other requirements listed below. Occurrences outside normal business hours may also be reported to the Division's Emergency Response personnel at (800) 662-7956, (800) 858-0368 or (919) 733-3300. Occurrence ReportingTimeframes (After Discovery) and Other Requirements (a) Visible sediment • Within 24 hours, an oral or electronic notification. deposition in a • Within 7 calendar days, a report that contains a description of the stream or wetland sediment and actions taken to address the cause of the deposition. Division staff may waive the requirement for a written report on a case -by -case basis. • If the stream is named on the NC 303(d) list as impaired for sediment - related causes, the permittee may be required to perform additional monitoring, inspections or apply more stringent practices if staff determine that additional requirements are needed to assure compliance with the federal or state impaired -waters conditions. (b) Oil spills and • Within 24 hours, an oral or electronic notification. The notification release of shall include information about the date, time, nature, volume and hazardous location of the spill or release. substances per Item 1(b)-(c) above (c) Anticipated • A report at least ten days before the date of the bypass, if possible. bypasses [40 CFR The report shall include an evaluation of the anticipated quality and 122.41(m)(3)] effect of the bypass. (d) Unanticipated • Wlthin24hours, an oral orelectronic notification. bypasses [40 CFR • Within 7calendardays, a report that includes an evaluation of the 122.41(m)(3)] quality and effect of the bypass. (e) Noncompliance • Within 24 hours, an oral or electronic notification. with the conditions • Within 7 calendar days, a report that contains a description of the of this permit that noncompliance, and its causes; the period of noncompliance, may endanger including exact dates and times, and if the noncompliance has not health or the been corrected, the anticipated time noncompliance is expected to environment[40 continue; and steps taken or planned to reduce, eliminate, and CFR 122.41(1)(7)] prevent reoccurrence of the noncompliance. [40 CFR 122.41(1)(6). • Division staff may waive the requirement for a written report on a case -by -case basis. NCGOI SELF -INSPECTION, RECORDKEEPING AND REPORTING EFFECTIVE: 04/01/19 1 O U z GROUND STABILIZATION AND MATERIALS HANDLING PRACTICES FOR COMPLIANCE WITH THE NCG01 CONSTRUCTION GENERAL PERMIT Implementing the details and specifications on this plan sheet will result in the construction activity being considered compliant with the Ground Stabilization and Materials Handling sections of the NCG01 Construction General Permit (Sections E and F, respectively). The permittee shall comply with the Erosion and Sediment Control plan approved by the delegated authority having jurisdiction. All details and specifications shown on this sheet may not apply depending on site conditions and the delegated authority having jurisdiction. SECTION E: GROUND STABILIZATION Required Ground Stabilization Timeframes Stabilize within Site Area Description this many calendar Timeframe variations days after ceasing a Perimeter dikes land disturbance swales, ditches, and perimeter 7 None slopes (b) High Quality Water 7 None (HQW) Zones (c) Slopes steeper If slopes are 10' or less in length and are than 3:1 7 not steeper than 2:1, 14 days are allowed -7 days for slopes greater than 50' in length and with slopes steeper than 4:1 -7 days for perimeter dikes, swales, (d) Slo es p 3:1 to 4:1 14 ditches, perimeter slopes and HQW Zones -10 days for Falls Lake Watershed -7 days for perimeter dikes, swales, ditches, (e) Areas with slopes perimeter slopes and HQW Zones flatter than 4:1 14 -10 days for Falls Lake Watershed unless there is zero slope Note: After the permanent cessation of construction activities, any areas with temporary ground stabilization shall be converted to permanent ground stabilization as soon as practicable but in no case longer than 90 calendar days after the last land disturbing activity. Temporary ground stabilization shall be maintained in a manner to render the surface stable GROUND STABILIZATION SPECIFICATION Stabilize the ground sufficiently so that rain will not dislodge the soil. Use one of the techniques in the table below: Temporary Stabilization Permanent Stabilization • Temporary grass seed covered with straw or • Permanent grass seed covered with straw or other mulches and tackifiers other mulches and tackifiers • Hydroseeding • Geotextile fabrics such as permanent soil • Rolled erosion control products with or reinforcement matting without temporary grass seed • Hydroseeding • Appropriately applied straw or other mulch • Shrubs or other permanent plantings covered • Plastic sheeting with mulch • Uniform and evenly distributed ground cover sufficient to restrain erosion • Structural methods such as concrete, asphalt or retaining walls • Rolled erosion control products with grass seed POLYACRYLAMIDES (PAMS) AND FLOCCULANTS 1. Select flocculants that are appropriate for the soils being exposed during construction, selecting from the NC DWR List of Approved PAMS/Flocculants. 2. Apply flocculants at or before the inlets to Erosion and Sediment Control Measures. 3. Apply flocculants at the concentrations specified in the NC DWR List of Approved PAMS/Flocculants and in accordance with the manufacturer's instructions. 4. Provide pending area for containment of treated Stormwater before discharging offsite. 5. Store flocculants in leak -proof containers that are kept under storm -resistant cover or surrounded by secondary containment structures. EQUIPMENT AND VEHICLE MAINTENANCE 1. Maintain vehicles and equipment to prevent discharge of fluids. 2. Provide drip pans an ans under stored equipment. Y 3. Identifyleaks and repair as soon as feasible or remove leaking equipment from the p g project. 4. Collect all spent fluids, store in separate containers and properly dispose as hazardous waste (recycle when possible). 5. Remove leaking vehicles and construction equipment from service until the problem has been corrected. 6. Bring used fuels, lubricants, coolants, hydraulic fluids and other petroleum products to a recycling or disposal center that handles these materials. LITTER, BUILDING MATERIAL AND LAND CLEARING WASTE 1. Never bury or burn waste. Place litter and debris in approved waste containers. 2. Provide a sufficient number and size of waste containers (e.g dumpster, trash receptacle) on site to contain construction and domestic wastes. 3. Locate waste containers at least 50 feet away from storm drain inlets and surface waters unless no other alternatives are reasonably available. 4. Locate waste containers on areas that do not receive substantial amounts of runoff from upland areas and does not drain directly to a storm drain, stream or wetland. 5. Cover waste containers at the end of each workday and before storm events or provide secondary containment. Repair or replace damaged waste containers. 6. Anchor all lightweight items in waste containers during times of high winds. 7. Empty waste containers as needed to prevent overflow. Clean up immediately if containers overflow. 8. Dispose waste off -site at an approved disposal facility. 9. On business days, clean up and dispose of waste in designated waste containers. PAINT AND OTHER LIQUID WASTE 1. Do not dump paint and other liquid waste into storm drains, streams or wetlands. 2. Locate paint washouts at least 50 feet away from storm drain inlets and surface waters unless no other alternatives are reasonably available. 3. Contain liquid wastes in a controlled area. 4. Containment must be labeled, sized and placed appropriately for the needs of site. 5. Prevent the discharge of soaps, solvents, detergents and other liquid wastes from construction sites. PORTABLE TOILETS 1. Install portable toilets on level ground, at least 50 feet away from storm drains, streams or wetlands unless there is no alternative reasonably available. If 50 foot offset is not attainable, provide relocation of portable toilet behind silt fence or place on a gravel pad and surround with sand bags. 2. Provide staking or anchoring of portable toilets during periods of high winds or in high foot traffic areas. 3. Monitor portable toilets for leaking and properly dispose of any leaked material. Utilize a licensed sanitary waste hauler to remove leaking portable toilets and replace with properly operating unit. EARTHEN STOCKPILE MANAGEMENT 1. Show stockpile locations on plans. Locate earthen -material stockpile areas at least 50 feet away from storm drain inlets, sediment basins, perimeter sediment controls and surface waters unless it can be shown no other alternatives are reasonably available. 2. Protect stockpile with silt fence installed along toe of slope with a minimum offset of five feet from the toe of stockpile. 3. Provide stable stone access point when feasible. 4. Stabilize stockpile within the timeframes provided on this sheet and in accordance with the approved plan and any additional requirements. Soil stabilization is defined as vegetative, physical or chemical coverage techniques that will restrain accelerated erosion on disturbed soils for temporary or permanent control needs. ONSITE CONCRETE WASHOUT STRUCTURE WITH LINER 1 BELOW GRADE WASHOUT STRUCTURE ABOVE GRADE WASHOUT STRUCTURE 1,, Ei­ CONCRETE WASHOUTS 1. Do not discharge concrete or cement slurry from the site. 2. Dispose of, or recycle settled, hardened concrete residue in accordance with local and state solid waste regulations and at an approved facility. 3. Manage washout from mortar mixers in accordance with the above item and in addition place the mixer and associated materials on impervious barrier and within lot perimeter silt fence. 4. Install temporary concrete washouts per local requirements, where applicable. If an alternate method or product is to be used, contact your approval authority for review and approval. If local standard details are not available, use one of the two types of temporary concrete washouts provided on this detail. 5. Do not use concrete washouts for dewatering or storing defective curb or sidewalk sections. Stormwater accumulated within the washout may not be pumped into or discharged to the storm drain system or receiving surface waters. Liquid waste must be pumped out and removed from project. 6. Locate washouts at least 50 feet from storm drain inlets and surface waters unless it can be shown that no other alternatives are reasonably available. At a minimum, install protection of storm drain inlet(s) closest to the washout which could receive spills or overflow. 7. Locate washouts in an easily accessible area, on level ground and install a stone entrance pad in front of the washout. Additional controls may be required by the approving authority. 8. Install at least one sign directing concrete trucks to the washout within the project limits. Post signage on the washout itself to identify this location. 9. Remove leavings from the washout when at approximately 75% capacity to limit overflow events. Replace the tarp, sand bags or other temporary structural components when no longer functional. When utilizing alternative or proprietary products, follow manufacturer's instructions. 10. At the completion of the concrete work, remove remaining leavings and dispose of in an approved disposal facility. Fill pit, if applicable, and stabilize any disturbance caused by removal of washout. HERBICIDES, PESTICIDES AND RODENTICIDES 1. Store and apply herbicides, pesticides and rodenticides in accordance with label restrictions. 2. Store herbicides, pesticides and rodenticides in their original containers with the label, which lists directions for use, ingredients and first aid steps in case of accidental poisoning. 3. Do not store herbicides, pesticides and rodenticides in areas where flooding is possible or where they may spill or leak into wells, stormwater drains, ground water or surface water. If a spill occurs, clean area immediately. 4. Do not stockpile these materials onsite. HAZARDOUS AND TOXIC WASTE 1. Create designated hazardous waste collection areas on -site. 2. Place hazardous waste containers under cover or in secondary containment. 3. Do not store hazardous chemicals, drums or bagged materials directly on the ground. NCGOI GROUND STABILIZATION AND MATERIALS HANDLING EFFECTIVE: 04/01/19 00 USLO CO M 0 0 U z