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SW8020928_COMPLIANCE_20030124
STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW DOC TYPE ❑CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE COMPLIANCE EVALUATION INSPECTION DOC DATE YYYYMMDD J - J L. N 00 D F D O �u m Q z O� rZ � � z 0 0 TROTT Rd. RECEIVED �A z 2003 C� HUFFk44N TO w N DWQ PROJ # swFaZO9ZS I � O Q o n STORMWATER CALCULATIONS FIRST CHRISTIAN CHURCH RICHLANDS, NC Onslow County, North Carolina Project #2022-001 (40) RECEIVED JAN 0 9 2003 DWQ PRO # 5 6 Prepared by: v MCI<IMF�=D V 243 North Front Street Wilmington, North Carolina 28401 (910) 343-1048 1��uurn1ga1h SN CARQ''•,�� SS 2� s FFlil : y �P `1 J c a ro Cl) M_ O 42 4" Ei Q O M � Q) a a U .c LO a � C Q a� O `O ~ CL m N �' c CD L L Uq �a.ro COUU o W a o 700 o w o U o m EQz a o cr w w cr- Q� o m o as 42 co LO co �.oQ)Q- Z— o0 W ❑ m p0 O w p p ti. o m co O ro ro E .Q 4 O q a o ro ro o p m U fi > +, O -ro p z Go a) O Q `� o o chi �a O a ro a� ro a a� fi m `D m ro ❑ o U .0 � fn Vl cox ro O > p ( F O O a CL 4 �' `� Q OL E E a� U CL 4 . C � N p Q) Q O p Q a U N as II o `'O p q p CL as � roQQ-c Q U U U U Q)�w-1 m a U) CO o "~ o a) W 9 r - F- � F-- f- ww w ww O o C) Cc) � 4 � �co ci o O � m N o a c d ° 0s CD �? 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O •O O � � •p O � m ; ) Q (D ; cow m UWUZO 4� yWUZ 0 o c c� �a U- LL U- U- � o a) QL c o o C) m M c cfl a� a co U � CD •C O_ .Q � O r O O c M m � a � c {j ai ro o o,CL U cn m > w O ❑ L c d c cii IL c r m a� c .o O co > a ❑ c aD LlJ aD v) ° o 2 o LL Li v o U o ElfW m NM 0 Z A �Nyw���u O a p(\j 110(�J1 00 y ^) Cal �o -v AGO z ry w r o Q � Q 0 N � y I� Z. 4 N., C, -1 0, -N, 7. ell C,w Fear Ir" co -q. P 241 41 ji. S 5 7 �7 6:--111 '7 - zi r ......... ------------ - -- E Dj' JAN 0 9 200/ 41 A DW4 Phoi # 7 .7 173 tAL V u" 01 - O:L i\ - ;7 — PUNTEEIMPILLN. PENDER CO 2, GAME I-- -N D Z A, 14 53 _J` _y -_ l —' +r f,.,..-I )K , -4, NN, �NICIQM&CREED January 7, 2003 Mrs. Linda Lewis NCDENR Division of Water Quality 127 Cardinal Drive Ext. Wilmington, NC 28405-3845 M & C 02022-001(10) JAN 0 -9 2003 4 U Re: First Christian Church Request for Additional Information Dear Mrs. Lewis: Enclosed is the additional information with regard to the stormwater package for the First Christian Church which is located at the intersection of US 258 and Trott Road in Richlands, NC. Regarding your comments, below is an explanation of the changes: l . The detail sheet and calculations have been sealed 2. Full size (24" x 36") plans have been submitted 3. Page three of the supplement is altered based on your comments 4. A vicinity map is added 5. The type of wetland species is placed in the detail If you have any further questions, please call at 910-343-1048. Sincerely, McKim & Creed, P. A. Tim Clinkscales, El Enclosures: Request for Additional Information Submittal package Pc: John Williams, PE, McKim & Creed Michelle Ginocchio, MAG File 243 N. FRONT ST., WILMINGTON, NORTH CAROLINA 28401 TEL 910.343.1048 FAX 910.251,8282 www.mckimcreed.com AA0002667 j! d'(,Qln LdLL ^^eY r RECEIVED (:�Jl/1fGLG9t/lI7.P/fb�lL� G"!}?i�C�L�liIZCS Ae Cl� j66 252-2 DEC 17 '2002 9Vdm,V&an, ✓ WA %"'.a 28402 910-45 mil• ,2-0009 DWG PROd # SGU �YO?Aq Z e D" ;r¢ 93-" AID 91-k 8805 %�ia(ovclla 'Z4' aue %D ion W 23403 July 24, 2001 Marie Arcuri McKim & Creed 234 N. Front Street Wilmington, NC 28401 Re: 404 Wetlands delineation for the First Christian Church in Richlands, Onslow County. Dear Marie, On July 23, 1999, Land Management Group, Inc made a site visit to the above mentioned property for the purposes of 404 wetlands delineation. Wetlands were flagged using the U.S. Army Corps of Engineers (C.O.E.) Wetlands Manual -1987 edition. Wetlands were Tiagged using a u"Yee parameter approach incorporating soils, vegetation, and hydrological indicators. Jurisdiction 404 Wetlands and Waters of the United States as regulated by the U.S. C.O.E. were observed on the subject property, see attached map. These wetlands were delineated in the field in pink/black striped ribbon. Because it was raining at the time of the delineation, the flags were not numbered. The flags along both the southern and eastern property line were placed along the top of the ditch bank. Access was gained to the eastern property line ditch from existing cut lines. The wetlands ribbons should be located on a boundary survey. When the completed survey is supplied to our office, we will submit the survey along with supporting documentation to the C.O.E. for approval and signature. After the survey is signed by the C.O.E., wetlands documentation on the above referenced property will be complete. Thank you for the opportunity to serve you in this matter. If you have further questions, please contact me. Respectfully, Tom Gulley I N O LU 3 � - � 95$ >.....ffa a 5k�°Zoabg$ 9 b �L-(V, "H I 4:0) Michael F. Easley, Governor William G. Ross, Jr., Secretary North Carolina Department of Environment and Natural Resources Alan W. Klimek, P.E., Director Division of Water Quality Wilmington Regional Office December 5, 2002 _ -- -- -- -- - Mr. Thomas H. Barbee, Trustee First Christian Church PO Box 425 Richlands, NC 28574 Subject: REQUEST FORADDITIONAL INFORMATION' Stormwater Project No. SW8 020928 First Christian Church On slow County Dear Mr. Barbee: The Wilmington Regional Office received a Stormwater Management Permit Application for First Christian Church on September 23, 2002. A preliminary review of that information has determined that the application is not complete. The following information is needed to continue the stormwater review: 1. Please either delineate all wetlands on site, disturbed or undisturbed, or note on the plans that none exist. 2. Please specify pond side slope vegetation and the wetland species to be planted on the 6:1 shelf. 3. Please add a vicinity map to the plans which includes the nearest intersection of two major roads. A major road is any 1, 2 or 3 digit NC, US or interstate highway. 4. Please provide the Stage -Storage calculations referred to in the calculations or provide a table of elevations, areas and volumes to support the conclusions that sufficient volume has been provided in the pond and forebay. 5. Please initial items e, i and m on page 2 of the supplement and provide the cleanout diagram on page 3 of the supplement. I"A RMENR N.C. Division of Water Quality 127 Cardinal Drive Extension Wilmington, N.C. 28405 (910) 395-3900 Fax (910) 350-2004 Customer Service 800-623-7748 Mr. Barbee - December 5, 2002 Stormwater Project No. SW8 020928 --------------------------------------------------- Please note that this request for additional information is in response to a preliminary - review. The.requested information should be -received -by this Office prior to January 5, 2003, or _ the application will be returned as incomplete. The return of a project will necessitate resubmittal of all required items, including the application fee. If you need additional time to submit the information, please mail or fax your request for a time extension to the Division at the address and fax number at the bottom of this letter. The request must indicate the date by which you expect to submit the required information. The Division is allowed 90 days from the receipt of a completed application to issue the permit. The construction of any impervious surfaces, other than a construction entrance under an - approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject to enforcement action pursuant to NCGS 143-215.6A. Please reference the State assigned project number on all correspondence. Any original documents that need to be revised have been sent to the engineer or agent. All original documents must be returned or new originals must be provided. Copies are not acceptable. If you have any questions concerning this matter please feel free to call me at (910) 395-3900. Sincerely, - Linda Lewis Environmental Engineer RSS/arl: S:1WQSISTORMWATIA.DDINFO120021020928.DEC cc: Linda Lewis Greg Hetzler, P.E. OZvy Zd' Footnotes: When using the Division SAIDA tables, the correct SA/DA ratio for pennanent pool sizing should be computed based upon the actual impervious % and permanent pool depth. Linear interpolation should be employed to deternune the correct value for non- standard table entries. In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide 90% TSS removal. The NCDENR $MP manual provides design tables for both 85% TSS removal and 90% TSS removal. II. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices Manual (N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If the applicant has designated an agent in the Stonnwater Management Permit Application Form, the -agent may initial below. If a requirement has not been met, attach justification. Applicants Initials -�� ✓ a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). c ✓ b. The forebay volume is approximately equal to 20% of the basin volume. .�� ✓ c. The temporary pool controls runoff from the design storm event. Tt,c ✓ d. The temporary pool draws down in 2 to 5 days. s_ �e3 If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow calculations) TLC' f. The basin length to width ratio is greater than 3:1. Gam` Pump 0m The basin side slopes above the permanent pool are no steeper than 3:1. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail). Vegetative cover above the permanent pool elevation is specified. A trash rack or similar device is provided for both the overflow and orifice. A recorded drainage easement is provided for each basin including access to nearest right- of-way. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified prior to use as a wet detention basin. A mechanism is specified which will drain the basin for maintenance or an emergency. III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. This system (check one) 0 does This system (check one) 0 does v0 does not v0 does not incorporate a vegetated filter at the outlet. incorporate pretreatment other than a forebay. Form SWU-102 Rev 3.99 Page 2 of 4 Maintenance activities shall be performed as follows: 1. After every significant runoff producing rainfall event and at least monthly: a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation, vegetated cover, and general condition. b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within 2 to 5 days as designed. 2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash as needed. 3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain proper functioning. 4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e. stockpiling near a wet detention basin or stream, etc.). The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the permanent pool depth reads feet in the main pond, the sediment shall be removed. When the permanent pool depth reads feet in the forebay, the sediment shall be removed. rPUT� SIN DIAGRAM ll in the blanks) GRAM HERE N r FOREBAY MAIN POND 5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These plants shall be encouraged to grow along the vegetated shelf and forebay berm. 6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain shall be minimized to the maximum extent practical. Form SWU-102 Rev 3.99 Page 3 of 4 DETENTION POND ANALYSIS FILENAME- G:IDATAIWPDATAIWQSIPOND1020928.WK1 PROJECT #: SW8 020928 REVIEWER: L. Lewis PROJECT NAME: First Christian Church DATE: 05-Dec-02 Receiving Strearn: New River Class: C NSW Drainage Basin: White Oak Index No. WOK02 19-(1) Site Area 9.47 acres Drainage Area - 41513,; square feet Area = 9.47 acres IMPERVIOUS AREAS Rational C Building 14400.00 square feet Parking 87900.00 square feet SW 2250.00 square feet square feet square feet square feet TOTAL 1ti450 Qb'': square feet Rational Cc= 0.15 SURFACE AREA CALCULATION IMPERVIOUS 25.34% SA/DA Ratio 2.28% Des. Depth 4 Req. SA 9410 sf TSS: 90 Prov. SA <<>:<t<:18<13' sf VOLUME CALCULATION Rational ?* Des. Storm :....:...::...:..:...: f.:C>, inches Rv= 0.28 Bottom 58 msl Perm. Pool 62.04< msl _.. Design Pool 63 msl Design SA 15781 sf Req. Volume 96'° cf Prov. Volume »>:137.9:7i cf ORIFICE CALCULATION Avg. Head = Flow Q2, cfs Flow Q5, cfs No. of Orifices Diameter, inches Drawdown = * place a "1" in the box if Rational is used FOREBAY Perm. Pool Volume= 25744 Req. Forebay Volume= 5148.8 Provided Volume= 4788.00 Percent= $6° SA @ _ Elevation= COMMENTS Surface Area , Volume and Orifice are within Design Guideline: in 2.42 sq. in. 0.97 sq. in. 1.77 sq. in. 0.040 cfs x FTM n DESIGN NARRATIVE AND EROSION CONTROL SPECIFICATION FIRST CHRISTIAN CHURCH RICHLANDS, NC Onslow County, North Carolina Project #2022-001 (40) Prepared for: First Christian Church September 2002 Project ##2022-0001 (40) Prepared by: RECEIVED SEP 2 3 2002 DWQ PROD # ��6Zo92S v MCKIM&=D 243 North Front Street Wilmington, North Carolina 28401 (910) 343-1048 7v FIRST CHRISTIAN CHURCH RICHLANDS, NC Onslow County, North Carolina Project #2022-001 (40) Table of Contents Page DesignNarrative.................................................................................................. ..................... Proposed Improvements 1 Erosion Control............................................................................... 1 Maintenance................................................................................ .... 2 ......................................... Erosion & Sedimentation Control Specification......................................................................... 3 Wet Detention Pond Calculations — NC DENR Erosion Control Requirements .........................7 DrainageBasin Map.................................................................................................................. 9 Storm Water Piping and Swale Calculations...........................................................................11 BMP Treatment Calculations............................................................ ....... 13 ............................... Wet Detention Pond Calculations — NC DENR SAIDA Ratio for TSS Removal ....................... 17 Onslow County SCS Soils Information....................................................................................19 Engineering Site Plans - Survey, C102................................................................................... 21 S:1202210001120 Tech1EROSJON DESIGN NARRATIVE.doc Page i FIRST CHRISTIAN CHURCH RICHLANDS, NC Onslow County, North Carolina Project #2022-001 (40) Design Narrative First Christian Church is proposing the construction of a new sanctuary and parking area. The site contains approximately 9.47 acres of open property with woods and a creek along three of its property lines. The site is located at the intersection of US 2581NC 24 and Trott Road (SR 1383). Areas to the south and east are woods and open space with a creek or waterway separating the properties. To the north, are residential homes with open and wooded lots. The area to the north is sloped toward the site. An existing Swale is located on the site to collect runoff from adjacent properties. The soil survey of Onslow County indicated the soils are Craven. The proposed stormwater pond is located in Craven Soil (Soil Type C). Wetlands are not located in the disturbed area including the outfall of the detention pond. The project is within the drainage basin that drains to the White Oak River Basin Land Management Group (LMG) of Wilmington NC conducted a site investigation for the purpose of reviewing any potential impact to wetland areas. LMG's has reported wetlands were not evidenced. The site was generally determined to have well-defined plow zone strata, indicative of recent agricultural activities, overlying well drained light tan Sandy Loam soils. Proposed Improvements I Erosion Control The proposed site clearing and grading limits will be 3.3 acres, Silt fence will be placed along the north and east side of the parking area, and around all proposed storm inlets in order to combat soil migration during construction. The maximum graded slope will not exceed three to one (3:1) and vegetative establishment will be a priority. Also a Swale is to be placed along the northern end to convey runoff from the adjacent properties. Storm water runoff from the proposed site will be conveyed to a detention pond, via overland flow, grassed swaies and storm water piping. The storm drain piping system has been designed to accommodate runoff from a 10-year storm event. During construction the detention pond will be used as a sediment basin, the required 8000 cubic feet of sediment storage (1800 cf per disturbed acre) is provided at elevation 60.0 of the pond. The pond is to be cleaned of all accumulated sediment once the site has been stabilized. The treatment pond has designed in accordance with NCDENR Best Management Practices (BMP). The pond's designed length to width ratio is approximately 3:1, and includes a fore -bay volume of 20% of the basin's overall volume. Pond side slopes are 3H to IV, with 6H to 1V planted littoral shelf. The littoral shelf is provided just below the control water surface elevation. The permanent pool depth is 4 feet. The pond will detain the 1" rainfall volume from the projects S:1202210001= Tech1EROSION DESIGN NARRATIVE.doc Page 1 drainage basins. The V rainfall volume will draw down through a 2" orifice in 3.3 days. Storm water in excess of the 1" rainfall volume will overflow the pond's riser structure and discharge to the outfall waterway. Supporting drainage calculations, drainage basin and pond information are provided within the following pages of this report. Maintenance Contractors shall be responsible for periodic inspection and maintenance of all indicated erosion control devices. In addition, inspection and any necessary maintenance will be required immediately following any significant storm event. Any measure that fails to function as intended shall be repaired immediately. Upon completion of construction and the establishment of stabilizing ground cover, the property owner shall be responsible for site maintenance. SA202210001120 TecMEROSION DESIGN NARRATIVE.doc Page 2 EROSION & SEDIMENTATION CONTROL SPECIFICATION PART 1 - GENERAL 1.1 RELATED DOCUMENT I A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section. ( 1.2 WORK INCLUDED A. Contractor shall take every reasonable precaution throughout construction to prevent the erosion of soil and the sedimentation of streams, lakes, reservoirs, other water impoundments, ground surfaces, or other property as required by State and Local regulations. Contractor shall, upon suspension or completion of land -disturbing activities, provide protection covering for disturbed areas. Permanent vegetation shall be established at the earliest practicable time. Temporary and permanent erosion control measures shall be coordinated to assure economical, effective, and continuous erosion and siltation control throughout the construction and post construction period. 1.3 RELATEDSECTIONS I A. Related 'Sections - The following Sections contain requirements that relate to this Section: i . 01011 - Existing Underground Utilities 2. 01 b 15 - Special Conditions for this Contract 3. 01070 -Shop Drawings, Project Data & Samples 4. 02200 - Earthwork, Excavation Trenching, and Backfilling 5. 02230 - Site Clearing 6. 02240 - Dewatering 7. 02485 - Seeding General Areas 1.4 REGULATORY REQUIREMENTS A. Contractor shall be responsible for prevention of damage to properties outside the construction limits from siltation due to construction of the project. The Contractor will assume all responsibilities to the affected property owners for correction of damages that mays occur. Erosion control measures shall be performed by the Contractor, conforming to the requirements of, and in accordance with plans approved by applicable state and local agencies and as per the erosion control portion of the construction drawings and these specifications. The Contractor shall not allow mud and debris to accumulate in the streets. Should the Contractor pump water from trenches during construction, appropriate siltation preventative measures shall be taken prior to discharge of pumped water into any storm drain or stream. PART 2 - PRODUCTS 2.1 Open mesh biodegradable mulching cloth. 2.2 Fertilizer shall be 10-10-10 grade or equivalent. S:1202210001120 Tech1EROSION DESIGN NARRATIVE.doc Page 3 2.3 Lime shall be dolomitic agricultural ground 1 limestone containing not less than 10 percent magnesium oxide. 2.4 Phosphate shall be 20 percent super phosphate or equivalent. 2.5 Provide grass seed mixture as shown on the plans. 2.6 Silt fence shall consist of non -biodegradable filter fabric (Trevira, Mirafi, etc.) wired to galvanized wire mesh fencing and supported by wood or metal posts. 2.7 NCDOT Class B stone for erosion control. PART 3 - EXECUTION 3.1 CLEARING A. Clearing and grubbing shall be scheduled and performed in such a manner that subsequent grading operation and erosion control practices can follow immediately thereafter. Excavation, burrow, and embankment operations will be conducted such that continuous operation. All construction areas not otherwise protected shall be planted with permanent vegetative cover within 15 working days after completion of active construction. 3.2 STABILIZING A. The angle for graded slopes and fills shall be no greater than the angle that can be retained by vegetative cover or other adequate erosion control devices or structures. All disturbed areas not to be paved and left exposed will, within 15 working days of completion of any phase of grading, be planted or otherwise provided with either temporary or permanent ground cover, devices, or structures sufficient to restrain erosion. 3.3 REGULATORY REQUIREMENTS A. Whenever land disturbing activity is undertaken on a tract, a ground cover sufficient to restrain erosion must be planted or other wise provided within 15 working days on that portion of the tract upon which further active construction is to being undertaken. B. If any earthwork is to be suspended for any reason whatsoever for longer than 15 calendar days, the areas involved shall be seeded with vegetative cover or otherwise protected against excessive erosion during the suspension period. Suspension of work in any area of operation does not relieve the Contractor of the responsibility for the control of erosion in that area. PART 4 - CONSTRUCTION PHASE 4.1 PRACTICES A. Avoid dumping soil or sediment into any streambed or watercourse. Backfili for stream crossings shall be placed dry and compacted to minimize siltation of the watercourse, where applicable. S:Q022100M20 Tech1EROSION DESIGN NARRATIVE.doc Page 4 Maintain an undisturbed vegetative buffer where possible between a natural watercourse and trenching and grading operations. C. Avoid equipment crossings of streams, creeks, and ditches where practicable. PART 5 - SEDIMENT CONTROL FEATURES 5.1 GENERAL A. All devices (silt fences, retention areas, etc.), for sediment control shall be constructed at the locations indicated prior to beginning excavation on the site. All devices shall be properly maintained in place until a structure or paving makes the device unnecessary or until directed to permanently remove the device. 5.2 DESIGN APPLICATIONS A. Mulch shall be used For temporary stabilization of areas subject to excessive erosion, and for protection of seed beds after planting where required. 1. Jute, mesh, etc. should be installed as per manufacturer's instructions. B. Silt fences shall be used at the base of slopes and in drainage swales to restrict movement of sediment from the site. Straw bales may be required for reinforcement. C. Riprap shall be used at the proposed outfall pipes as indicated on plans. D. Establish vegetative cover on all unpaved areas disturbed by the work. 1. Preparation of Seedbed. Areas to be seeded shall be scarified a depth of 6 inches until a firm, well -pulverized, uniform seedbed is prepared. Lime, phosphorous, and fertilizer shall be applied during the scarification process in accordance with the following rates. a. Lime - 1 ton per acre b. Phosphorous - 500 pounds per acre C. Fertilizer - 500 pounds per acre 2. Seeding. Disturbed areas along roads and ditches shall be permanently seeded with 500 pounds per acre of Wilmington Bahia during the period from March through September. Seeding performed during the period from October to February shall be temporarily seeded with 45 pounds per acre of Annual Rye. The permanent vegetative cover will be over seeded at the earliest possible time as specified above. 3. Mulch all areas immediately after seeding. Mulch shall be applied and anchored as specified hereinbefore. 5.3 MAINTENANCE A. The Contractor shall be responsible for maintaining all temporary and permanent erosion control measures in functioning order. Temporary structures shall be maintained until such time as vegetation is firmly established and grassed areas shall be maintained until completion of the project. Areas which fail to show a suitable stand of grass or which are damaged by erosion shall be immediately repaired. S:r202210001120 Tech1EROSION DESIGN NARRATIVE.doc Page 5 5.4 REMOVAL OF SEDIMENT CONTROL DEVICES A. Near completion of the project, when directed by the Owner's agent, the Contractor shall dismantle and remove the temporary devices used for sediment control during construction. All erosion control devices in seeded areas shall be left in place until the grass is established. Seed areas around devices and mulch after removing or filling temporary control devices. END OF SECTION 02410 S:Q022\0001\20 Tech1EROSION DESIGN NARRATIVE.doc Page 6 WET DETENTION POND CALCULATIONS W NC DENR EROSION CONTROL REQUIREMENTS S:Q022\0001\20 Tech1EROSION DESIGN NARRATIVE.doc Page" $ � .0 � 7S L) ci U � c 0 CL r- 0 C � � � � L 0 Ll c C 2 $ � 0 2 � g w k 0 0 CL \ i ® k � � 0 CL k 9 \ k d � w v § mom$ o � � Cf) © � i i A ) 0 0 « @ 2 � ■ 10 ■ ■ u § 2 � ■ � » 0 IL If DRAINAGE BASIN MAP S:1202210001120 Tech1EROSION DESIGN NARRATIVE.doc Page V 9 S:12022\0001\80 dwg\CG101-20220001.dwg, 07/02/2002 11:54:39 AM, TClinkscales jl 3 '$ �� ��� �-� ■g�ggpaq g�g� o�p �y �y,qP $6V 9pa a �aaaa a �F � �q iti RG 4 Y.i �g� ❑ � I E�� fi${�� � l3 8 R& 99gy 3 g I C pg y9 t yp p I!p 1 \ '� ���I o •f' L o% C I " 258 NC H1�Y 2 ES i! s 4 ml a i S a S �...n yvts ps STORM WATER PIPING AND SWALE CALCULATIONS S:1202210001120 Tech1ERQSION DESIGN NARRATIVE.doc Paget' it Z z o a p p O O N j=V A CDo& V A A �00 a o- a M- o v o v v U > > v U > > M U~ ono N m O N N - � y- d CJ Q d N G 00 LO 'cT to 117 O nj nj N N N N a a O O aIs CD O ; 00 o0 m c � c c v o Ui U U� IR ao `m N w N cq U aCL _oo U nNLn M ccoom CD 4N�NO CcN7 03 CV 1- n Q, cn N N co co .r ll (i. 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E 192 ONSLOW COUNTY SCS SOILS INFORMATION SA202210001120 Tech1EROSION DESIGN NARRATIVE.doc Page It 17 91 B. 1 1 1 1 1 1 1 1 I 1 1 1017T'1*0 �Wj w1 11 1 i pd71' I i i I RT'i*0; G i wl i I i l R71 iq -94" IW i l i l P77°13P' 4g9i Wi I I I I i i1 z „� ,� '�°• �`� � rr � as .� � t, n .;° �aa -� I i��- 77 19 BMA 22. 24 20 t . f � �' � '•7a6"� � ' ui iilt:Jv'Vi1 ` -I -'�/ , � i !f sow •.'" �. `�;� '4 � . � ! � /• xo lot i tit =1�` :� •'�.� `� " � i ' • ?O� I � '•y -. � . • � � 1.0 �� `'\ .a am 17.7 17 t\ Mal 77 i � i' ■ �J y ' ., 'Jr �` o � c� i ./ • .: • ~\ � 1. s l l 1 l l f l l l l l IOhf°13b'16AC�iVI I t I 1 076�4'0.66"W I I l l loVt-1 16ob4,vl I I I I Wi b60.66,W l I-i l 10Vf'133'16&4Wl I I I I I I Name: RICHLANDS Date: 2/15/2002 Scale: 1 inch equals 2000 feet Location: 034° 54' 34.4" N 077' 34' 05.8" W (C) 1997, NMptech, Inc.