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HomeMy WebLinkAbout20010359 Ver 1_Complete File_20010313F WATF 9 Michael F. Easley ?O? QG Governor Cq William G. Ross, Jr., Secretary j Department of Environment and Natural Resources 0 Kerr T. Stevens Division of Water Quality April 2, 2001 Yancey County DWQ Project No. 01-0359 SR 1406, Silas Hensley Road APPROVAL of 401 Water Quality Certification with Additional Conditions Mr. Roger D. Bryan, Environmental Officer NCDOT Division 13 P.O. Box 3279 Asheville, NC 28801-5006 Dear Mr. Bryan: You have our approval, in accordance with the attached conditions and those listed below, to impact 50 linear feet of Hensley Branch for the purpose of upgrading SR 1406 (Silas Hensley Road) in Yancey County. The project should be constructed in accordance with your application dated 9 March 2001 (received 13 March 2001). After reviewing your application, we have decided that this project is covered by General Water Quality Certification Number 3289. This certification corresponds to Nationwide Permit 14 issued by the Corps of Engineers. In addition, you should acquire any other federal, state or local permits before you proceed with your project including (but not limited to) Sediment and Erosion Control, Non-Discharge and Water Supply Watershed regulations. This approval will expire with the accompanying §404 permit, unless otherwise specified in the Water Quality Certification. The following additional conditions will be required: 1. In-stream work and land disturbance within the 25-foot wide buffer zone are prohibited during the trout spawning season of October 15 through April 15 to protect the egg and fry stages of trout from sedimentation during construction. 2. Stormwater management controls should be directed to buffer areas or retention basins and should not be routed directly into streams. 3. High Quality Waters Erosion Control Guidelines must be implemented prior to any ground-disturbing activities to minimize impacts to downstream aquatic resources. Temporary or permanent herbaceous vegetation should be planted on all bare soil within 5 days of ground-disturbing activities to provide long term erosion control. 4. The culvert required for this project shall be installed in such a manner that the original stream profile is not altered (i.e. the depth of the channel should not be reduced by a widening of the streambed). 5. All work shall be performed during low flow conditions. 6. All mechanized equipment operated near surface waters should be regularly inspected and maintained to prevent contamination of stream waters from fuels, lubricants, hydraulic fluids, or other toxic materials. 7. The presence of equipment in the channels must be minimized. Under no circumstances should rock, sand or other materials be dredged from the wetted stream channel under authorization of this permit, except in the immediate vicinity of the culverts. 8. Mowing of existing vegetated buffers is strongly discouraged, so that they may be utilized for storm water sheet flow. 9. Use of rip-rap for bank stabilization is to be minimized; rather, native vegetation is to be planted when practical. If necessary, rip-rap should be limited to the stream bank below the high water mark, and vegetation should be used for stabilization above high water. 10. Rock silt screens at culvert outlets should be removed at project completion. North Carolina Division of Water Quality, 401 Wetlands Certification Unit, 1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address) 2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location) 919-733-1786 (phone), 919-733-6893 (fax), http://h2o.enr.state.nc.us/ncwetlands/ Page 2 of 2 This approval is valid solely for the purpose and design described in your application (unless modified below). Should your project change, you must notify the DWQ and submit a new application. If the property is sold, the new owner must be given a copy of this Certification and approval letter, and is thereby responsible for complying with all the conditions. If the proposed fill is in excess of 150 linear feet of stream length or 1 acre of wetlands, compensatory mitigation will required as described in 15A NCAC 2H.0506 (h) (6) and (7). For this approval to be valid, you must follow the conditions listed in the attached certification and any additional conditions listed above. If you do not accept any of the conditions of this certification, you may ask for an adjudicatory hearing. You must act within 60 days of the date that you receive this letter. To ask for a hearing, send a written petition that conforms to Chapter 150B of the North Carolina General Statutes to the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, N.C. 27699-6714. This certification and its conditions are final and binding unless you ask for a hearing. This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water Act. If you have any questions, please telephone John Dorney at 919-733-9646. Sincerely, Attachment Pc Wilmington District Corps of Engineers Corps of Engineers Asheville Field Office NCDWQ Asheville Regional Office Central Files MEMORANDUM TO: John Dorney Non-Discharge Branch Regional Contact: Wanda Frazier WQ Supervisor: Forrest West-all Date: SUBJECT: WETLAND STAFF REPORT AND RECOMMENDATIONS Facility Name NCDOT - SR 1406 Project Number 01 0359 Recvd From DOT Received Date 3/13/01 Recvd By Region Project Type road widening Certificates Stream Stream Impacts (ft.) Permit Wetland Wetland Wetland Stream Class Acres Feet Type Type Impact Score Index Prim. Supp. Basin Req. Req. ME 14 Stream P77@ N F _-F, 112-26-4 rF _c TR 40,304. F 50.00- F 50.00 F- ?- O Y ? N F_I - I -F_F_F_F_ 1---I Mitigation Wetland MitigationType Type Acres Feet Is Wetland Rating Sheet Attached? Q YO N Did you request more info? Q Y O N Have Project Changes/Conditions Been Discussed With Applicant? Q Y O N Is Mitigation required? Q Y 0 N Recommendation: Q Issue # Issue/fond O Deny Provided by Region: Latitude (ddmmss) 355847 Longitude (ddmmss) 822533 County Yancey County2 Region Asheville cc: Regional Office Central Office Page Number 1 Comments: Requested stormwater management controls from road to trout stream. DOT has stated that they will grass all ditches to comfy with our request. (Letter documenting such mailed to Dorney 3-29-01 from Asheville Regional Office.) a.a AAT(o? ye.,y t?? s STATE of NORTH CAROLINA VD 1 3 K01 DEPARTMENT OF TRANSPORTATION MICHAEL F. EASLEY LYNDO TIPPETT GOVERNOR Mr. Steve Lund PO BOX 3279, ASHEVILLE, NC 28802 March 9, 2001 US Army Corps of Engineers 151 Patton Avenue, Room 208 Asheville, NC 28801-5006 Subject: Nationwide Permit #14 SR 1406, Silas Hensley Road Yancey County, NC Dear Mr. Lund: SECRETARY 011®861(1 I have enclosed a straight-line diagram with erosion control plan, a PCN application for NWP #14, and a location map relative to the proposed project on SR 1406, Silas Hensley Road, Yancey County, NC. Silas Hensley Road is currently a 12-14 feet wide gravel road. Division of Highways plans to pave the road 18 feet wide and increase the typical section. Grading will be light to moderate. Whenever possible, widening will occur on the side opposite the streams. We propose to extend three culverts on Hensley Branch and unnamed tributaries. Total culvert extensions will be 50 linear feet. Existing channel morphology will be maintained upstream and downstream of the culvert. The culvert will be placed below existing streambed elevation. Riparian vegetation will be reestablished along disturbed areas associated with the culvert extensions. No significant effect on federally listed species (threatened or endangered) or their habitats is anticipated. n < rn _E? C r? D -?-1 By copy of this letter, we request Owen Anderson, North Carolina Wildlife Resources Commission Mountain Region Coordinator, to comment directly to the Corps concerning the permit request. Mr. Steve Lund Page -2 SR 1406, Yancey County March 9, 2001 By copy of this letter, we are asking W. Neil Trivette, Area Roadside Environmental Engineer, to comment on the above project. Temporary encroachment into the buffer zone will be required for the project for a majority of the project. The streams are classified as trout. By copy of this letter, I am forwarding seven (7) copies of the application package to Cynthia Van der Wiele, NC DENR, Division of Water Quality, 401/Wetland Unit for review and comment. A 5200.00 check is enclosed for application processing. Please forward comments directly to the Corps with copy to Division 13 Environmental Officer. Your earliest consideration for this request would be greatly appreciated. If you have any questions or information needs, please contact me at (828) 251-6287. Sincerely, 11r . P ? Roger D. Bryan Division 13 Environmental Officer Enclosures cc: F. D. Martin, P.E. K. A. Wilson, P.E. Ron Brazil Neil Trivette Owen Anderson Cynthia Van der Wiele J ?- J DWQ ID: eORPS ACTION ID: NATIONWIDE PERMIT REQUESTED (PROVIDE NATIONWIDE PERMIT #) 14 PRE-CONSTRUCTION NOTIFICATION APPLICATION FOR NATIONWIDE PERMITS THAT REQUIRE: 1. NOTIFICATION TO THE CORPS OF ENGINEERS 2. APPLICATION FOR SECTION 401 CERTIFICATION 3. COORDINATION WITH THE NC DIVISION OF COASTAL MANAGEMENT SEND THE ORIGINAL AND (1) COPY OF THIS COMPLETED FORM TO THE APPROPRIATE FIELD OFFICE OF THE CORPS OF ENGINEERS (SEE AGENCY ADDRESSES SHEET). 1. OWNER'S NAME: N.C. Department of Transportation 2. MAILING ADDRESS: P.O. Box 3279 SUBDIVISION NAME CITY: Asheville STATE: NC ZIP CODE: 28802 PROJECT LOCATION ADDRESS, INCLUDING SUBDIVISION NAME (IF DIFFERENT FROM MAILING ADDRESS ABOVE): SR 1406. Silas Hensley Road, Yancey County 3. TELEPHONE NUMBER: (HOME) (WORK) (828) 251-6287 4. IF APPLICABLE: AGENT'S NAME OR RESPONSIBLE CORPORATE OFFICIAL, ADDRESS, PHONE NUMBER: 5. LOCATION OF WORK (PROVIDE A MAP, PREFERABLY A COPY OF USGS TOPOGRAPHIC MAP OR AERIAL PHOTOGRAPHY WITH SCALE): COUNTY: Yancey - NEAREST TOWN: Bee LO.Q SPECIFIC LOCATION (INCLUDE ROAD NUMBERS, LANDMARKS, ECT.) Silas Hensley Road is located off of Bald Mountain Road(SR 1395) approximately 2 miles west of its intersection with US 19W. 6. IMPACTED OR NEAREST STREAM/RIVER: Hensley Branch RIVER BASIN: French Broad 7. (a) IS PROJECT LOCATED NEAR WATER CLASSIFIED AS TROUT, TIDAL SALTWATER, (SA), HIGH QUALITY WATERS (HQW), OUTSTANDING RESOURCE WATERS (ORW), WATER SUPPLY (WS-I OR WS-II)? YES X NO IF YES, EXPLAIN: Class C- Trout (b) IS THE PROJECT LOCATED WITHIN A NORTH CAROLINA DIVISION OF COASTAL MANAGEMENT AREA OF ENVIRONMENTAL CONCERN (AEC)? YES ? NO X (c) IF THE PROJECT IS LOCATED WITHIN A COASTAL COUNTY (SEE PAGE 7 FOR LIST OF COASTAL COUNTIES), WHAT IS THE LAND USE PLAN (LUP) DESIGNATION? 8. (a) HAVE ANY SECTION 404 PERMITS BEEN PREVIOUSLY REQUESTED FOR USE ON THIS PROJECT? YES ? NO X IF YES, PROVIDE ACTION I.D. NUMBER OF PREVIOUS PERMIT AND ANY ADDITIONAL INFORMATION (INCLUDE PHOTOCOPY OF 401 CERTIFICATION): (b) ARE ADDITIONAL PERMIT REQUESTS EXPECTED FOR THIS PROPERTY IN THE FUTURE? YES ? NO X IF YES, DESCRIBE ANTICIPATED WORK: 9. (a) ESTIMATED TOTAL NUMBERS OF ACRES IN TRACT OF LAND: 7_1 (b) ESTIMATED TOTAL NUMBER OF ACRES OF WETLANDS LOCATED ON PROJECT SITE: 0.0 10. (a) NUMBER OF ACRES OF WETLANDS IMPACTED BY THE PROPOSED PROJECT BY: FILLING: EXCAVATION: FLOODING: OTHER : DRAINAGE : TOTAL ACRES TO BE IMPACTED: 0.0 (b) (1) STREAM CHANNEL TO BE IMPACTED BY THE PROPOSED PROJECT (IF RELOCATED, PROVIDE DISTANCE BOTH BEFORE AND AFTER RELOCATION: LENGTH BEFORE: 50 FT AFTER: FT WIDTH BEFORE (based on normal high water contours): 1_3 FT AVERAGE DEPTH BEFORE: 0_3FT AFTER: FT (b) (2) STREAM CHANNEL IMPACTS WILL RESULT FROM: (CHECK ALL THAT APPLY) OPEN CHANNEL RELOCATION: PLACEMENT OF PIPE IN CHANNEL: X CHANNEL EXCAVATION: CONSTRUCTION OF A DAM/FLOODING: OTHER: 11. IF CONSTRUCTION OF A POND IS PROPOSED, WHAT IS THE SIZE OF THE WATERSHED DRAINING TO THE POND? N/A WHAT IS THE EXPECTED POND SURFACE AREA? 12. DESCRIPTION OF PROPOSED WORK INCLUDING DISCUSSION OF TYPE OF MECHANICAL EQUIPMENT TO BE USED? (ATTACH PLANS; 81/2 BY 11 DRAWINGS ONLY) We propose to grade drain base pave and install erosion control measures for SR 1406 (Silas Hensley Road) We propose to extend three existing culverts on Hensley Branch and unnamed tributaries (See attached culvert sheet) Total culvert extensions will be 50 linear feet. The culverts will be installed to insure aquatic life passage within the streams. Mechanical equipment will include backhoe, graders, trucks, and paving machinery. 13. PURPOSE OF PROPOSED WORK: To provide a safe paved road to the traveling public. 14. STATE REASONS WHY IT IS BELIEVED THAT THIS ACTIVITY MUST BE CARRIED OUT IN WETLANDS (INCLUDE ANY MEASURES TAKEN TO MINIMIZE WETLAND IMPACTS) N/A 15. YOU ARE REQUIRED TO CONTACT THE US FISH AND WILDLIFE SERVICE AND/OR NATIONAL MARINE FISHERIES SERVICE REGARDING THE PRESENCE OF ANY FEDERALLY LISTED OR PROPOSED FOR LISTING ENDANGERED OR THREATENED SPECIES OR CRITICAL HABITAT IN THE PERMIT AREA THAT MAY BE AFFECTED BY THE PROPOSED PROJECT. DATE CONTACTED: N/A 16. YOU ARE REQUIRED TO CONTACT THE STATE HISTORIC PRESERVATION OFFICER (SHPO) REGARDING THE PRESENCE OF HISTORIC PROPERTIES IN THE PERMIT AREA WHICH MAY BE AFFECTED BY THE PROPOSED PROJECT. DATE CONTACTED 3/9/01. 17. DOES THE PROJECT INVOLVE AN EXPENDITURE OF PUBLIC FUNDS OR THE USE OF PUBLIC (STATE) LAND? YES X NO ? (IF NO, GO TO 16) (a) IF YES, DOES THE PROJECT REQUIRE PREPARATION OF AN ENVIRONMENTAL DOCUMENT PURSUANT TO THE REQUIREMENTS OF THE NORTH CAROLINA ENVIRONMENTAL POLICY ACT? YES ? NO X (b) IF YES, HAS THE DOCUMENT BEEN REVIEWED THROUGH THE NORTH CAROLINA DEPARTMENT OF ADMINISTRATION STATE CLEARINGHOUSE YES ? NO ? IF ANSWER 17b IS YES, THEN SUBMIT APPROPRIATE DOCUMENTATION FROM THE STATE CLEARINGHOUSE WITH THE NORTH CAROLINA ENVIRONMENTAL POLICY ACT. QUESTIONS REGARDING THE STATE CLEARINGHOUSE REVIEW PROCESS SHOULD BE DIRECTED TO MS. CHRYS BAGGETT, DIRECTOR STATE CLEARINGHOUSE, NORTH CAROLINA DEPARTMENT OF ADMINISTRATION, 116 WEST JONES STREET, RALEIGH, NORTH CAROLINA 27603-8003, TELEPHONE (919) 733-6369. 18. THE FOLLOWING ITEMS SHOULD BE INCLUDED WITH THIS APPLICATION IF PROPOSED ACTIVITY INVOLVES THE DISCHARGE OF EXCAVATED OR FILL MATERIAL INTO WETLANDS: N/A (a) WETLAND DELINEATION MAP SHOWING ALL WETLANDS, STREAMS, LAKES, AND PONDS ON THE PROPERTY (FOR NATIONWIDE PERMIT NUMBERS 14, 18, 21, 26, 29, AND 38). ALL STREAM (INTERMITTENT AND PERMANENT) ON THE PROPERTY MUST BE SHOWN ON THE MAP. MAP SCALES SHOULD BE 1 INCH EQUALS 50 FEET OF 1 INCH EQUALS 100 FEET OF THEIR EQUIVALENT. (b) IF AVAILABLE, REPRESENTATIVE PHOTOGRAPH OF WETLANDS TO BE IMPACTED BY PRODUCT. (c) IF DELINEATION WAS PERFORMED BY A CONSULTANT, INCLUDE ALL DATA SHEETS RELEVANT TO THE PLACEMENT OF THE DELINEATION LINE. (d) ATTACH A COPY OF THE STORMWATER MANAGEMENT PLAN IF REQUIRED. (e) WHAT IS LAND USE OF SURROUNDING PROPERTY? (0 IF APPLICABLE, WHAT IS PROPOSED METHOD OF SEWAGE DISPOSAL? SIGNED AND DATED AGENT AUTHORIZATION LETTER, IF APPLICABLE. NOTE: WETLANDS OR WATERS OF THE US MAY NOT BE IMPACTED PRIOR TO: I. ISSUANCE OF A SECTION 404 CORPS OF ENGINEERS PERMIT, 2. EITHER THE ISSUANCE OR WAIVER OF A 401 DIVISION OF WATER QUALITY CERTIFICATION, AND 3. (IN THE TWENTY COASTAL COUNTIES ONLY), A LETTER FROM THE NORTH CAROLINA DIVISION OF COASTAL MANAGEMENT STATING THE PROPOSED ACTIVITY IS CONSISTENT WITH THE NORTH CAROLINA COASTAL MANAGEMENT OG11, Ale) OWNO?'S/AGENT', JSIGNATURE DATE , (AGENT'S SIGNATURE VALID ONLY IF AUTHORIZATION LETTER FROM THE OWNER IS PROVIDED). V l'?\ ? }? ? ? '?*`?? ? { .F7 ,? y..?k?,?_?(,'•r ? it l`..??„ ?,1 Cl.'?. ? :' ? i ;;e?:-%fj",)}S} ?r Lr' e ' b '' ?\ •, 0• ij. X800 '-- BEGIN PROJECT _ ?;?^ Z _ -? 11ao 0208- " i 1 8 318 16 09 r- Jtl ©( i hj ND PROJECT ?? CJ - it _ 400 O - S pson eak Thuntra? bJ - j 46 Ylo R G 21a 44 2 D° • Sampso 138e Gap - ~ R. O _ - - _ - / _ _ --- Mop Location Map: SR 1406, Silas Hensley Road, Yancey County, NC (Bald Creek Quadrangle, Scale 1:24000). Proposed Culvert Extensions on Surface Waters SR 1406, Silas Hensley Road Yancey County, NC Hensley Branch and UnT Survey Station Existing Culvert (ft) Proposed Culvert (ft) Extension ft) 21+20 0 30 30 38+10 25 30 5 78+65 25 40 15 Total Extensions 50 ft N.C. DEPARTMENT OF TRANSPORTATION DIVISION OF HIGHWAYS SECONDARY ROAD SURVEY SUBJECT: S R 4-0(o S I L A S N C N S L. E Y RD. LOCATION: FRoM S R 1395 To E.O.M. WORK TYPE: G RA DEr BAS , PAVE Are DRF. i N WORK ORDER: PRIORITY: COUNTY: YA N c E Y TOWNSHIP: DATE: 2-19-01 SCALE: so' NOTES: +5' R /W Co?CoS' = 1.3 miles PREPARED BY: w E I_ PIPE DATA CO. ?Ar,Ca SR# 140(0 51LAS ENSL?y oA? WORK ORDER STATION PRESENT SIZE PROPOSED SIZE NOTES lot Is"CA-, P I:?T2- rf• L F3 P ?+ ?- F P IS t 58 -15" CAI P 17 t 2 2 ' - ,(v I P q + 4-O 13'- 48" FFg P I t v ?D'- ''Gr;?G +20 40'-I "ci iP 22-t 2" Cm p -t Z8 70' - m p SrA. 2? -Z2 + o"- 18 GM p '- (R" CM P O'- 15" m p ss P s pl- 1;9s S GIPS sS }?I p? t20 l P ec) -15 P wV P 72vli Y PIPE r,? 5 P i P C I >,?1.' Co., r, C K T i?S I P CQO!5S LACe ? . cl; SPRIM D + +7 ?5S'- P-4 11 , 0 f) 2o,_ CMP ExT Cor T ss PI P PIP + 39+12- 47 +i 2-S'- 24'" CA IS'- I " CAI P 35'_ r- T. oc)T CeO s. P c Bp -w Pr-- PI 151t is S? LASTIC SO'- 2 M 24 `" IJ FT I ''C UT/_?T C•]E z+ S?. t 3 7 --bo-- 20'- 1 S' M w P ( P / t 60 2o'- z -*" Cm p v PIP (o+70 '- r" cnnP T-) PW IP 0+75 (015+4-S ' -I A-:1C, 3_ ' -t3"PLASTIC. ' ce ._5 1P ct? S IPF ? + 4-,n 0t'7 2./. - 30'-(5"Cnl EXTOU /01 m A`/ ?3?-- To SMALL- Po 1 ,' 1 S P1P 15' rnP DRW P 74 + 60 27'-/5' M P ° ' E)(vT T to/ I?a I P e 7 - , m p 2 40'- 3 L" rr.,) P e-poss p I P E POLE DATA NPN 61-03447 PROJECT SR W-oGj SILAS HF-msLeY 1?d.i OWNER OF POLE LINE FlezvY--14 E) ROA I) DIST. FROM CENTER PRESENT ROAD STATION POLE NUMBER LT. RT. :OUNTY YA NCE V Sheet 1 of EL&-- T 21 C ?? I Zo /J DIST. FROM CENTER DIST. CENTER PROJECT PROJECT AFTER MOVING REMARKS LT. RT. LT. RT. G' t O ' Pow's p- 2- + 2 2l Tomsr,- EROSION _ CONTROL ..DETAILS AND SPECIFICATIONS Std, ,T a' ti v nl Page 245.03 Temporary Silt Ditch _ __ 245.05 Temporary Diversion ? ?? --- ? ? • ............................ --- VI - 4 893.01 Temporary Silt Fence TD 890.05 Temporary Slope Drain with .......... Earth Berm ??? 4-- vi s 245.01 Silt Basin Type A ----- 245.02 '"'"'""" y ' ' Silt Basin Type B --------'--- VI - 10 892.04 Temporary Rock Silt ------- -Check ---? --Types-----•-----A -•--. _ ........... ? --- VI 12 • 895.10 _._...... ----------- V1 -14 Temporary Rock Silt Check Type-B .....- -------- Temporary Rock Sediment Dam Type-A ..•..._.. 892.01 --- -18 -• 892.02 Temporary Rock Sediment Dam Type-13 .-- 897.01 ? ---------- VI - 20 Rock Pipe Inlet Protection .11 --------------------- ---- - VI'- 22 894.01 •,. ?,. --- Rock Silt Screen ......................................... VI - 24 245.04 Stilling Basin VI - 26 Rock Inlet Protection: -- -- - 806.01 _.TYPe A .. ................................ A 0-.:OR ' A ---- yz 30 ----- 896.02 Type B ............................... B - OR'-- B? ----- VI - 32 896.03 Type C .•---•--• ------------------• C • OR - C)) ---- VI 34 PIPE- OUTLET EQERG D(SW/MR .'.'. ERo S 10 t? cc)9Tc 0 L MArnj! G Scm t-(BEP\ GLAss RoVwG FGR- VI-1 March, 1993 CLEAN W-D d07 ?v yE?? ,S?,gL?- , E- 3 z? Z&-A,61X 0,- 3 J TSB 9) .. 3?? Z? L EiIGJ',4•' or= 1J?STU?BE? ????A ROADWAY DITCH AND MEDIAN LINING GUIDELINES Percent of Grade Type of Lirnin-- Recommended 0 S traNv and Tack 2 --E-rdsiori- Control Matting 3 A Synthetic Roving 5 greater Stone VIII- 2 Zvi-Irrlh 1001 EROSION CONTROL PLAN SHEET Silt fences and temporary silt ditches shall be installed after clearing and before grading. Temporary stone ditch checks shall be installed as soon as ditchline is established. Pipe outlet and inlet protection will be done as soon as the pipe is installed. _ Silt basins (Type B) will be constructed to the dimension of nine feet by three _ ---feet-by two-feef unless otherwise n-oted on the plans. (SB 9) See dmensiori?sheet: Seeding and other permanent erosion control measures are to be implemented as soon as practical. Temporary rock silt checks (Type B) will be spaced as required by percent of grade. PIPE INSTALLATION NOTES 1) Install erosion control devices. In streams, where necessary, rock silt screens will be used. 2) Remove material and existing pipe while limiting, as much as ------ possible;Znaterial and sediment-from entering the stream and/or - - escaping from project. 3) Prepare pipe foundation while again taking care to limit, as much as possible, material and sediment from entering the stream and/or escaping from project. Where possible, new grade will be below existing streambed. If needed, bedding material will be clean stone. 4) Place the new pipe and compact backfill. 5) Install slope protection on outlet and inlet ends of pipe. Also complete installation of erosion control measures and perform maintenance as needed on existing measures. 6) Establish permanent vegetation as soon as possible. i ? 1 20' GR.'PARKiNC? I I I I I I ?I I I W 4' CONC. W ALx LAWN I I 3 ? 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