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HomeMy WebLinkAboutSW8970303_HISTORICAL FILE_20080620STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW eq-1 DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE YYYYM M D D STATE OF NORTH CAROLINA Department of Environment and Natural Resources WIRO Regional Office FILE ACCESS RECORD SECTION SWP DATE/TIME �/i NAME �� REPRESENTING 71: 49 . Guidelines for Access: The staff of the Regional Office is dedicated to making public records in our custody readily available to the public for review and copying. We also have the responsibility to the public to safeguard these records and to carry out our day-to-day program obligations. Please read carefully the following before signing the form. 1. Due to the large public demand for file access, we request that you call at least a day in advance to schedule an appointment for file review so you can be accommodated. Appointments are scheduled between 9:00 a.m. and 3:00 p.m._Viewing _time ends at 4:45 p_m. Anyone arriving without an appointment may view the files to the extent that time and staff supervision are available. 2. You must specify files you want to review by facility name or incident number, as appropriate. The number of files that you may review at one appointment will be limited to five. 3. You may make copies of a file when the copier is not in use by the staff and if time permits. There is no charge fo-_r_25 or less copies„_cost-mr copy -after the initial 25 is 2.5 per copy. Payment is to be made by check, money order, or cash in the administrative offices. 4. Files must be kept in the order you received them. Files may not be taken from the office. No briefcases laMe totes, etc. are permitted in the, file review area. To remove, alter, deface, mutilate, or destroy material in public files is a misdemeanor for which you can be fined up to $500.00. 5. In accordance with GS 25-3-512, a $25.00 processing fee will be charged and collected for checks on which payment has been refused. 6. The customer must present a photo ID, sign -in, and receive a visitor sticker prior to reviewing files. FACILITY NAME �SIJ� rfD�D�j COUNTY 2. 3. r ..._ 4CicjNa1ture/1WW,6me-6f1$m` / #A or Business Date im In. XT_!imect (Please attach business card to form if available) # Copes: b� Amt. Pd: V `O o; /11 �1 OfNice vnsT. p,r4 s . ow a r�9pc, � r U -<1 March 24, 2008 Mr. James G. Rice, President Rice Construction & Development P.O. Box 6769 Myrtle Beach, SC 29577 Subject:: Stormwater Permit No. SW8970303 Mr. Store It -Phase 2 New Hanover County Dear Mr. Rice: Michael F. Easley, Governor William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources Coleen H. Sullins Director Division of Water Quality The Division of Water Quality issued a Coastal Stormwater Management Permit, Number SW8970303 to Rice Construction & Development, for a High Density stormwater pond to serve the Mr. Store It -Phase 2 on 5/23/1997. This permit expired on 5/23/2007. Section .1003(h) of 15 A NCAC 2H .1000 (the stormwater rules) requires that applications for permit renewals shall be submitted 180 days prior to the expiration of a permit and must be accompanied by a processing fee, which is currently set at $505.00. if this is still an active project please complete and submit the enclosed renewal application in a timely manner. If this project has not been constructed and a permit is no longer needed, please submit a request to have the permit rescinded. If you have sold the project, or are no longer the permittee, please provide the name, mailing address and phone number of the person or entity that is now responsible for this permit. Enclosed is a form for change of ownership, which should be completed and submitted if the property.has changed hands. Your permit requires that upon completion of construction and prior to operation of the permitted treatment units a certification of completion be submitted to the Division from an appropriate designer for the system installed. This is to certify that the permitted facility has been installed in accordance with the permit, the approved plans, specifications and supporting documentation. Please include a copy of the certification with your permit renewal request and processing fee. Enclosed is a copy of a sample certification. Also enclosed is a new Operation and Maintenance agreement that should be completed and submitted along with your renewal application. You should be aware that failure to provide the Designer's Certification and the operation of a stormwater treatment facility without a valid permit, are violations of NC General Statute 143- 215.1 and may result in appropriate enforcement action including the assessment of civil penalties of up to $10,000 per day. If you have any questions, please feel free to contact staff in the stormwater group at 910-796-7215. Si cerel , Ed Beck, Regional Supervisor Surface Water Protection Section Wilmington Regional Office Enclosures One cc: Wilmington Regional Office Alti ra!!ya North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone (910) 796-7215 Customer Service Wilmington Regional Office Internet: www•.ncwateiqu31ity.0rk Fax (910) 350-2004 1-877-623-6748 An Equal Opportunity/Affirmative Action Employer— 50% Recycled110% Post Consumer Paper Date: November 13, 2007 To: Pat Durrett From: Elizabeth D. Hickmon Re: Mr. Store It -Phase 2 SW8970303 Comments: This permit expired on May 23, 2007. You sent a letter on May 23, 2007, but we have received no response. For some reason this did not appear on your list of inspections. James G. Rice, President SW8970303 Unknown WIRO - Mr. Rice Construction & New Store It -Phase 2 Development Hanover 5/23/97 5/23/97 P.O. Box 6769 Myrtle Beach, SC 29577 - �¢ 3 49 7 6 �Zfy CADocuments and SetlingslehickmonlMy DocumentsWemos to PatISW8970303.doc o�o� w A CIO � May 23, 2007 Mr. James G. Rice, President Rice Construction & Development P.O. Box 6769 Myrtle Beach, SC"29577 Subject:: Stormwater Permit NorSW8970.303 .J Mr. Store It -Phase 2 New Hanover County Dear Mr. Rice: Nlichael F. Easley, Govcmor William G. Doss Jr., Secretary North Carolina Department orI?m•ironnient and Natural Resources Alan W. Klimek, P.I:. DirecIOr Division of Water Quality The Division of Water Quality issued a Coastal Stormwater Management Permit, Number SW8970303 to Rice Construction & Development, for a High Density stormwater pond to serve the Mr. Store It - Phase 2 on 5/23/1997. This permit expired on 5/23/2007. Section A 003(h) of 15 A NCAC 2H .1000 (the stormwater rules) requires that applications for permit renewals shall be submitted 180 days prior to the expiration of a permit and must be accompanied by a processing fee, which is currently set at $420.00. If this is still an active project please complete and submit the enclosed renewal application in a timely manner. If this project has not been constructed and a permit is no longer needed, please submit a request to have the permit rescinded. If you have sold the project, or are no longer the permittee, please provide the name, mailing address and phone number of the person or entity that is now responsible for this permit. Enclosed is a form for change of ownership, which should be completed and submitted if the property has changed hands. Your permit requires that upon completion of construction and prior to operation of the permitted treatment units a certification of completion be submitted to the Division from an appropriate designer for the system installed. This is to certify that the permitted facility has been installed in accordance with the permit, the approved plans, specifications and supporting documentation. Please include a copy of the certification with your permit renewal request and processing fee. Enclosed is a copy of a sample certification. Also enclosed is a new Operation and Maintenance agreement that should be completed and submitted along with your renewal application. You should be aware that failure to provide the Designer's Certification and the operation of a stormwater treatment facility without a valid permit, are violations of NC General Statute 143-215.1 and may result in appropriate enforcement action including the assessment of civil penalties of up to $10,000 per day. If you have any questions, please feel free to contact staff in the stormwater group at 910-796-7215. Sincere-l'y', Ed Beck, Regional Supervisor Surface Water Protection Section Wilmington Regional Office Enclosures cc: CWilmingfon Regional Office North Carolina Division of Water Quahk' Internet: One 127 Cardinal drive 13xtcnsion Phone (910) 796-7215 North Carolina Wilininp um, NC 28403 Fax (910) 350-2004 Naturally An Equal OpportunitylAffirmative Action Employer— 50% Recycled110% Post Consumer Paper State of North Carolina Department of Environment and Natural Resources Wilmington Regional Office James B. Hunt, Jr., Governor Wayne McDevitt, Secretary Division of Water Quality August 12, 1998 Mr. James Rice, President Rice Construction and Development PO Box 6769 Myrtle Beach, SC 29577 Subject: Modification for Mr. Store -It Phase II Stormwater Project No. SW8 970303 New Hanover County Dear Mr. Rice: On August 6, 1998, McKim and Creed Engineers forwarded the Division of Water Quality a copy of a proposed plan for Sandridge Apartments, Phase III. The runoff from this project was permitted to be treated in the detendion pond constructed for Mr. Store -It, which was issued to you on May 23, 1997. The permit allotted 3.26 acres of impervious area for Sand Ridge Apartments. The modification proposes only 2.58 acres, a net reduction of 0.68 acres. The Mr. Store -It pond as permitted, has been designed to handle this runoff. All conditions of your current permit remain in force. The modified Sand Ridge Apartments plans will become part of the approved plans. If you have any questions, please do not hesitate to call me at (919) 395-3900. Sincerely, 1�� /1,16" Linda Lewis Environmental Engineer RSS/arl: S:IWQSISTORMWATILETTERS1970303.AUG cc: Linda Lewis Herb Fox, P.E., City of Wilmington Engineering Larry Sneeden, P.E. Tony Roberts, New Hanover County Inspections Central Files 127 Cardinal Dr. Ext., Wilmington, North Carolina 28405, ' Telephone 910-395-3900 FAX 910-350-2004 An Equal Opportunity Affirmative Action Employer 50% recycled110% post -consumer paper AUG 0 6 1998 John R. Andrew, P.E. Andrew & Kuske J.A. Kuske, P.E. — — — CONSULTING ENGINEERS, INC. '- J. Phillip Norris, RE, 902 Market St. * Wilmington, North Carolina 28401-4733 * Telephone 910/343-9653 * Fax 910/343-9604 August 5, 1998 Ms. Linda Lewis NCDENR/Div. of Environmental Mgmt. 127 Cardinal Drive Extension Wilmington, NC 28405-3845 RE: Mr. Store -It Detention Pond Permit No. SW8 970303 A & K Project No. 97205/96217 Dear Ms. Lewis: As a part of the approval of the referenced project, additional off -site area was included in the design and submittal documents to accommodate anticipated runoff from Sandridge Apartments, Phase 11 and III. Phase II is an existing development that presently does not drain to the pond. Phase Ili is proposed development. The off -site impervious area (0.36 acres) attributed to the Troy Drive extension was constructed as shown and discharges to the pond. In completing the plans for Sandridge Phase III, we modified the size and number of buildings and reduced the parking area. The net result, as detailed below, was a 21 % reduction of impervious surface. Permitted Proposed Area 5.00 3.65 Impervious Area 3.26 2.58 % Impervious 65 71 The difference in total area and percent impervious area is pervious site area that flows off -site. Per our conversation of August 4, we are attaching two copies of the proposed grading plan and one original plan with impervious coverage calculations. It is our understanding that a new permit or existing permit modification are not required. Sincerely, ANDREW & KUSKE CONSULTING GINEERS, INC. C. Lawrence Sneeden, Jr., P. E. CLS/tsm CC' Carroll Mason, Jim Snowa, Herb Fox M1 7-5 — Andrew & Kuske CONSULTING ENGINEERS, INC. John R. Andrew, P.E. J.A. Kuske, P.E. J. Phillip Norris, P.E. 902 Market St. • Wilmington, North Carolina 28401-4733 • Telephone 910/343-9653 • Fox 910/343-9604 May 6, 1997 Ms. Linda Lewis rsy NC DEHNR/Div. of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405-3845 Re: Mr. Store -It, Phase 2 Stormwater Project No. SW8 970303 A&K Project No. 96217 Dear Ms. Lewis: Page 1 of the calculations has been revised to indicate a design of 90% TSS removal for the pond. The pond design as submitted was adequate to meet this criteria without further discussion of that thing downstream of the pond outlet. Please contact us if you require further information. Sincerely, ANDREW & KUSKE CONSULTING ENGINEERS, INC. C Z_ /",// - C. Lawrence Sneeden, Jr., P.E. CLS/sbs enclosures cc: Jim Rice/Rice Construction & Development 96217-1 Date Design Andrew and Kuske f l2 9/� o L s ENGINEERS, INC. 2p2 N. FiFih Ave. Wilmington, N.C. 284p4of >SheetCONSULTING Check Job For Job No. c41-cs I SAh1r)rZtrD,, 4 p 7 JF I 9- Zz'j �'Ro J EST -pA ra �To<Ae AlzCA 4,30 uC�v f 1.21 C/1S-r = 5,s1 Iq Sur3I3•AVA 7; 1 N LCr To 7 e- pE I?- AaCA AR"4 Ac A� 2 .. L�J(iSr 0,40 /V6 V. 0,83 0. ► 8 -r074� l.l03 0, 48 EXIS7- - — NF-NV cam, IS. 0.04 -ro SAL NEw p.2S 0, 07 "TU TA C C) 'a o , o 7 NEw o•�� v,�6 To7AL 0,&7 0./(, G 6y"sr 0,41 C, I l��\✓ O •Sa �� o, l � ^TOTAL S�r3T47�9LI L�X15T f•21 O.¢1 iv6 IV -z 4- O, 66 707--7L S,SI 2.92 �- LDC, S 'f A W- \VA /A `'Sy o,07 0.33 0,10 O,SO 0'3 % o,2-7 0,31 0,07 0•&5- 783� o, 17 /.1S -7 -a 0.0s 0.0) © 0. )1 v.C?9 o,01 o,2z 7G 3° 0.11 0,09 0,02- 0.22 76'a p, 27 O 1`7 C�, OS O.S/ 7 5� 0127 O.SI 7(,se 0,o4- p,zl Q.pS 0.30 73s� cz) o,217 o,05 o,34- ('8g" 0,o4- p,5o a, �o C),&4 7a g° a. 1► a,s4 a, IS p, E? C) U,93 0,2o f 78 73yU o,7(o 1,47 0135 z, S£' 7 1 `'a — 0,01 - o, 01 015� o,�� 1, 4-8 0,35-,S5 4-7% Pipe Upstream Downstream Inlet Weighted Inlet Total System Discharge Length Constructed Section Roughness Capacity Upstream Downstream Upstream Downstream Upstream Upstream Downstream Downstream Node Node Area Roughness CA CA Intensity (cfs) (It) Slope Size (cfs) Invert Invert Ground Ground Cover HGL Cover HGL (acres) Coefficient (acres) (acres) (in/hr) (ftift) Elevation Elevation Elevation Elevation A (ft) M) 00 (ft) (ft) (ft) (ft) P-6 SDCI #6 SDCI #5 0.91 0.69 0.63 0,63 6.30 4.00 12.00 0.016667 12 inch 0.013 4.60 48.20 48.00 51.20 51.10 2.00 49.88 2.10 49.73 P-5 SDCI #5 SDCI #4 0.67 0.73 0.49 1,12 6.29 TV 69.00 0.013043 15 inch 0.013 7.38 48.00 47.10 51.10 51.60 1.85 49.47 3.25 48.64 Pit SDCI #4 SDCI #3 0.29 0.73 0.21 1.33 6.26 8.41 145.00 0.035172 15 inch 0.013 12.11 47.10 42.00 51.60 45.00 3,25 48.23 1.75 43.15 P-3 SDCI #3 SDMH #1 0.15 0.48 0.07 1A1 6.20 8.78 78.00 0.038462 15 inch 0.013 12.67 42.00 39.00 45.00 44.00 1.75 43.15 3.75 39.77 P-2 SDCI #2 SDMH #1 1.63 0.69 1.13 1.13 6.30 7.18 332.00 0.012048 15 inch 0.013 7.09 43.00 39.00 46.20 44.00 1.95 44,07 3.75 40.04 P-1 SDMH #1 Outlet N/A NIA N/A. 2.54 6.16 15.73 16.00 0.012500 18 inch 0.013 11.74 35.40 35.20 44.00 43,00 7.10 37,06 6.30 36,70 ProjectTTftte'SANDRIDGE'APARTMENTS'PKiASEr3 Project Engineer:;t7ARRY^SNEEDEH c:1?'lstiiic�piojecti97205sandridgetsandndgstm SIT'EWOR_ KS-DESiGN`GRt3U StormCADrv1`.0 ry,, CTi067MUSAm (203)755,1666 Pa9e;1 Of;1 01Y28l98�i2:21:37P,M ©;Haestad Method s'[:^37; ncBrookside'Road�Wateihu '�" Date Design Andrew and Kuske Sheet / 202 N. 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Figure 8.06a Design of outlet protection protection from a round pipe flowing full, minimum tailwater condition (Tw < 0.5 diameter). Rt v. 1193 8.06.3 Data for MR. STORE -IT, PHASE 2 Page 1 TEN YEAR 24-HOUR RAINFALL= 7.0 IN Prepared by ANDREW & KUSKE CONSULTING ENGINEERS,INC 25 Mar 97 HVdroCAD 4.523 000479 (c) 1986-1996 Applied Microcomputer Systems WATERSHED ROUTING i} �6 IB ❑E] E W y T T 0 O O a OSUBCATCHHENT , ❑ REACH A POND I I LINK Data for MR. STORE -IT, PHASE 2 Page 2 TEN YEAR 24-HOUR RAINFALL= 7.0 IN Prepared by ANDREW & KUSKE CONSULTING ENGINEERS,INC 25 Mar 97 HydroCAD 4.523 00D479 (c) 1986-1996 Applied Microcomputer Systems SUBCATCHMENT 1 AREA TO POND I PEAK= 2.73 CFS @ 12.05 HRS, VOLUME= .14 AF ACRES CN SCS TR-20 METHOD .42 30 OPEN TYPE III 24-HOUR .14 95 BLDG & PAVE RAINFALL= 7.0 IN .23 99 WATER SURFACE SPAN= 10-15 HRS, dt=.02 HRS .79 62 Method Comment Tc min CURVE NUMBER (LAG) METHOD Segment ID: 3.9 L=120' s=.06 '/' SUBCATCHMENT 3 . AREA TO CURB INLET 3 PEAK= .69 CFS @ 12.02 HRS, VOLUME= .03 AF ACRES CN SCS TR-20 METHOD .09 95 BLDG & PAVE TYPE III 24-HOUR RAINFALL= 7.0 IN SPAN= 10-15 HRS, dt=.02 HRS Method_ Comment Tc (min) CURVE NUMBER (LAG)^METHOD Segment ID: 2.4 L=80' S=.01 '/' SUBCATCHMENT 4 AREA TO DROP INLET 4 PEAK= 2.52 CFS @ 12.04 HRS, VOLUME= .13 AF ACRES CN SCS TR-20 METHOD .34 95 BLDG & PAVE TYPE III 24-HOUR RAINFALL= 7.0 IN SPAN= 10-15 HRS, dt=.02 HRS Method _ _Comment _ Tc (min) CURVE NUMBER (LAG) METHOD Segment ID: 3.3 L=120' S=.01 SUBCATCHMENT 5 AREA TO DROP INLET 5 PEAK= 1.71 CFS Q 12.04 HRS, VOLUME= .09 AF ACRES CN SCS TR-20 METHOD .23 95 BLDG & PAVE TYPE III 24-HOUR RAINFALL= 7.0 IN SPAN= 10-15 HRS, dt=.02 HRS Method Comment Tc min CURVE NUMBER (LAG) METHOD Segment ID: 3.3 L=120' s=.01 '/' Data for MR. STORE -IT, PHASE 2 Page 3 TEN YEAR 24-HOUR RAINFALL= 7.0 IN Prepared by ANDREW & KUSKE CONSULTING ENGINEERS,INC 25 Mar 97 HVdroCAD 4.523 000479 (c) 1986-1996 Applied Microcomputer Systems SUBCATCHMENT 7 AREA TO DROP INLET 7 PEAK= 1.07 CFS @ 12.05 HRS, VOLUME= .05 AF ACRES CN SCS TR-20 METHOD .03 30 OPEN TYPE III 24-HOUR .14 95 BLDG & PAVE RAINFALL= 7.0 IN .17 84 SPAN= 10-15 HRS, dt=.02 HRS Method Comment Tc (min) CURVE NUMBER (LAG) METHOD Segment ID: 4.1 L=90' s=.01 '/' SUBCATCHMENT 8 AREA TO DROP INLET 8 PEAK= 1.83 CFS @ 12.08 HRS, VOLUME= .10 AF ACRES CN' SCS TR-20 METHOD .06 30 OPEN TYPE III 24-HOUR .26 95 BLDG & PAVE RAINFALL= 7.0 IN .32 83 SPAN= 10-15 HRS, dt=.02 HRS Method Comment Tc (min) CURVE NUMBER (LAG) METHOD Segment ID: 6.3 L=150' s=.01 '/' SUBCATCHMENT 9 AREA TO CURB INLET 9 PEAK= 1.39 CFS @ 12.04 HRS, VOLUME= .07 AF ACRES CN SCS TR-20 METHOD .05 30 PLAZA TYPE III 24-HOUR .18 95 ROAD & SIDE_WALK RAINFALL= 7.0 IN .23 81 SPAN= 10-15 HRS, dt=.02 HRS Method _ _ Comment Tc (_min) TR-55 SHEET FLOW PLAZA 2.2 Grass: Dense n=.24 L=12' P2=4.5 in s=.02 RECT/VEE/TRAP CHANNEL GUTTER 1.4 D=.4' SS= 0 & .02 '/' a=4 sq-ft Pw=20.4' r=.196' s=.025 '/' n=.02 V=3.96 fps L=340' Capacity=15.9 cfs Total Length= 352 ft Total Tc= 3.6 Data for MR. STORE -IT, PHASE 2 Page 4 TEN YEAR 24-HOUR RAINFALL= 7.0 IN Prepared by ANDREW & KUSKE'CONSULTING ENGINEERS,INC 25 Mar 97 HydroCAD 4.523 000479 (c) 1986-1996 Applied Microcomputer Systems SUBCATCHMENT 10 AREA TO CURB INLET 10 PEAK= 1.39 CFS @ 12.04 HRS, VOLUME= .07 AF ACRES CN SCS TR-20 METHOD .05 30 PLAZA TYPE III 24-HOUR .18 95 ROAD & SIDEWALK RAINFALL= 7.0 IN .23 81 SPAN= 10-15 HRS, dt=.02 HRS Method Comment - _ Tc (min) TR-55 SHEET FLOW PLAZA 2.2 Grass: Dense n=.24 L=12' P2=4.5 in s=.02 RECT/VEE/TRAP CHANNEL GUTTER 1.4 D=.4' SS= 0 & .02 '/' a=4 sq-ft Pw=20.4' r=_196' s=.025 '/' n=.02 V=3.96 fps L=330' Capacity=15.9 cfs Total Length= 342 ft Total Tc= 3.6 SUBCATCHMENT 11 SANDRIDGE APTS, PHASE 2 & 3 PEAK= 16.63 CFS @ 12.21 HRS, VOLUME= 1.20 AF ACRES CN 1.74 30 OPEN 3.26 95 BLDG &PAVE 5.00 72 SCS TR-20 METHOD TYPE III 24-HOUR RAINFALL= 7.0 IN SPAN= 10-15 HRS, dt=.02 HRS Method Comment - Tc (min) CURVE NUMBER (LAG) METHOD 15.8 L=480' s=.02 '/' Data for MR. STORE -IT, PHASE 2 Page 5 TEN YEAR 24-HOUR RAINFALL= 7.0 IN Prepared by ANDREW & KUSKE CONSULTING ENGINEERS,INC 25 Mar 97 HydroCAD 4.523„ 000479 (c)„ 1966-1996 Applied Microcomputer Systems REACH 1 POND OUTLET PIPE Qin = 8.41 CFS @ 12.61 HRS, VOLUME= 1.35 AF Qout= 8.41 CFS @ 12.61 HRS, VOLUME= 1.34 AF, ATTEN= Or, LAG= .2 MIN DEPTH END AREA DISCH (FT) (SQ-FT) (CFS) 0.0 -0.0 0.00 .2 .1 .26 .3 .3 1.07 .5 .4 2.39 1.1 1.3 10.23 1.2 1.5 11.94 1.4 1.7 13.02 1.4 1.7 13.14 1.5 1.8 13.02 1.5 1.8 12.21 i8" PIPE n= .01 LENGTH= 25 FT SLOPE= .008 FT/FT STOR-IND+TRANS METHOD PEAK DEPTH= .91 FT PEAK VELOCITY= 7.5 FPS TRAVEL TIME = .1 MIN SPAN= 10-15 HRS, dt=.02 HRS REACH 3 PIPE FROM Cl #3 TO FES #1 Qin = 21.24 CFS @ 12.20 HRS, VOLUME= 1.74 AF Qout= 21.22 CFS @ 12.21 HRS, VOLUME= 1.74 AF, ATTEN= Q,, LAG= DEPTH END AREA DISCH (FT) (SQ-FT) (CFS) 0.0 -0.0 0.00 .2 .2 .51 .4 .4 2.15 .6 .8 4.80 1.4 2.3 20.52 1.6 2.7 23.96 1.8 3.0 26.12 1.9 3.1 26.36 1.9 3.1 26.12 2.0 3.1 24.51 24" PIPE n= .012 LENGTH= 126 FT SLOPE= .01 FT/FT 4 MIN STOR-IND+TRANS METHOD PEAK DEPTH= 1.44 FT PEAK VELOCITY= 8.8 FPS TRAVEL TIME = .2 MIN SPAN= 10-15 HRS, dt=.02 HRS REACH 4 PIPE FROM DI #4 TO Cl #3 Qin = 4.19 CFS @ 12.04 HRS, VOLUME= .22 AF Qout= 4.17 CFS @ 12.05 HRS, VOLUME= .22 AF, ATTEN= Oa, LAG= DEPTH END AREA DISCH (FT) (SO -FT) (CFS) 0.0 -0.0 0.00 .1 0.0 .19 .2 .1 .81 .3 .2 1.81 .7 .6 7.76 .8 .7 9.05 .9 .7 9.87 .9 .8 9.96 1.0 .8 9.87 1.0 .8 9.26 12"' PIPE n= .01 LENGTH= 65 FT SLOPE= .04 FT/FT 2 MIN STOR-IND+TRANS METHOD PEAK DEPTH= .46 FT PEAK VELOCITY= 11.8 FPS TRAVEL TIME = .1 MIN SPAN= 10-15 HRS, dt=.02 HRS Data for MR. STORE -IT, PHASE 2 Page 6 TEN YEAR 24-HOUR RAINFALL= 7.0 IN Prepared by ANDREW & KUSKE CONSULTING ENGINEERS,INC 25 Mar 97 H droCAD 4.523 000479 c 1986-1996 Applied Microcomputer Systems REACH 5 PIPE FROM DI 45 TO DI #4 Qin = 1.71 CFS Q 12.04 HRS, VOLUME= .09 AF Qout= 1.68 CFS @ 12.05 HRS, VOLUME= .09 AF, ATTEN= lt, LAG= .7 MIN DEPTH END AREA DISCH (FT) (SQ-FT) (CFS_ 0.0 -0.0 0.00 .1 0.0 .12 .2 .1 .50 .3 ..2 1.11 .7 .6 4.75 .8 .7 5.54 .9 .7 6.05 .9 .8 6.10 1.0 .8 6.05 1.0 .6 5.67 12" PIPE n= .01 LENGTH= 165 FT SLOPE= .015 FT/FT STOR-IND+TRANS METHOD PEAK DEPTH= .36 FT PEAK VELOCITY=. 6.5 FPS TRAVEL TIME = .4 MIN SPAN= 10-15 HRS, dt=.02 HRS REACH 6 PIPE FROM MH #6 TO CI #3 Qin = 19.31 CFS @ 12.20 HRS, VOLUME= 1.49 AF Qout= 19.29 CFS Q 12.21 HRS, VOLUME= 1.49 AF, ATTEN= 0%, LAG= DEPTH END AREA DISCH (FT) (SQ-FT) (CFS) 0.0 -0.0 0.00 .2 .2 .51 .4 .4 2.15 .6 .8 4.80 1.4 2.3 20.52 1.6 2.7 23.96 1.8 3.0 26.12 1.9 3.1 26.36 1.9 3.1 26.12 2.0 3.1 24.51 24" PIPE n= .012 LENGTH= 125 FT SLOPE= .01 FT/FT CIfu11`l STOR-IND+TRANS METHOD PEAK DEPTH= 1.34 FT PEAK VELOCITY= 8.7 FPS TRAVEL TIME = .2 MIN SPAN= 10-15 HRS, dt=.02 HRS REACH 7 PIPE FROM Cl #7 TO MH #6 Qin = 2.79 CFS Q 12.07 HRS, VOLUME= .16 AF Qout= 2.79 CFS Q 12.08 HRS, VOLUME= .16 AF, ATTEN= Oak, LAG= DEPTH END AREA DISCH (FT) (SO -FT) (CFS) 0.0 -0.0 0.00 .1 0.0 .14 .2 .1 .59 .3 .2 1.31 .7 .6 5.60 .8 .7 6.53 .9 .7 7.13 .9 B 7.19 1.0 .8 7.12 1.0 .8 6.69 12" PIPE n= .012 LENGTH= 30 FT SLOPE= .03 FT/FT I 0=014el STOR-IND+TRANS METHOD PEAK DEPTH= .44 FT PEAK VELOCITY= 8.4 FPS TRAVEL TIME = .1 MIN SPAN= 10-15 HRS, dt=.02 HRS Data for MR. STORE -IT, PHASE 2 Page 7 TEN YEAR 24-HOUR RAINFALL= 7.0 IN Prepared by ANDREW & KUSKE CONSULTING ENGINEERS,INC 25 Mar 97 HydroCAD 4.523 000479 (c) 1986-1996 Applied Microcomputer Systems REACH 8 PIPE FROM DI #8 TO Cl #7 Qin = 1.83 CFS @ 12.08 HRS, VOLUME= .10 AF Qout= 1.81 CFS @ 12.09 HRS, VOLUME= .10 AF, ATTEN= It, LAG= .6 MIN DEPTH END AREA DISCH (FT) (SQ-FT) (CFS) 0.0 -0.0 0.00 .1 0.0 .10 .2 .1 .41 .3 .2 .93 .7 .6 3.96 .8 .7 4.62 .9 .7 5.04 .9 .8 5.08 1.0 .8 5.04 1.0 .8 4.73 REACH 9 12" PIPE n= .012 LENGTH= 120 FT SLOPE= .015 FT/FT PIPE FROM CI #9 TO MH #6 STOR-IND+TRANS METHOD PEAK DEPTH= .42 FT PEAK VELOCITY= 5.8 FPS TRAVEL TIME _ .3 MIN SPAN= 10-15 HRS, dt=.02 HRS Qin = 17.80 CFS @ 12.21 HRS, VOLUME= 1.34 AF Qout= 17.78 CFS @ 12.21 HRS, VOLUME= 1.34 AF, ATTEN= Oo, LAG= .4 MIN DEPTH END AREA DISCH (FT) (SQ-FT) LCFS) 0.0 -0.0 0.00 .2 .1 .38 .3 .3 1.58 .5 .4 3.52 1.1 1.3 15.06 1.2 1.5 17.59 1.4 1.7 19.16 1.4 1.7 19.35 1.5 1.8 19.18 1.5 1.8 17.99 REACH 10 18" PIPE n= .012 LENGTH= 110 FT SLOPE= .025 FT/FT PIPE FROM Cl #10 TO Cl #9 STOR-IND+TRANS METHOD PEAK DEPTH= 1.22 FT PEAK VELOCITY= 11.6 FPS TRAVEL TIME _ .2 MIN SPAN= 10-15 HRS, dt=.02 HRS I Qin = 17.22 CFS @ 12.21 HRS, VOLUME= 1.27 AF Qout= 17.21 CFS @ 12.21 HRS, VOLUME= 1.27 AF, ATTEN= 0a, LAG= .1 MIN DEPTH END AREA DISCH (FT) (SQ-FT) (CFS) 0.0 -0.0 0.00 .2 .1 .38 .3 .3 1.58 5 .4 3.52 1.1 1.3 15.06 1.2 1.S 17.59 1.4 1.7 19.18 1.4 1.7 19.35 1.5 1.8 19.18 1.5 1.8 17.99 18" PIPE n= .012 LENGTH= 36 FT SLOPE= .025 FT/FT STOR-IND+TRANS METHOD PEAK DEPTH= 1.18 FT PEAK VELOCITY= 11.6 FPS TRAVEL TIME _ .1 MIN SPAN= 10-15 HRS, dt=.02 HRS Data for MR. STORE -IT, PHASE 2 Page 8 TEN YEAR 24-HOUR RAINFALL= 7.0 IN Prepared by ANDREW & KUSKE CONSULTING ENGINEERS,INC 25 Mar 97 H drOCAD 4.523 000479 c 1986-1996 Applied Microcomputer Systems POND 1 DETENTION POND #E1 Qin = 22.55 CFS @ 12.20 HRS, VOLUME= 1.88 AF Qout= 8.41 CFS @ 12.61 HRS, VOLUME= 1.35 AF, ATTEN= 63%, LAG= 24.5 MIN Qpri= 8.41 CFS @ 12.61 HRS, VOLUME= 1.35 AF Qsec= 0.00 CFS @ 0.00 HRS, VOLUME= 0.00 AF ELEVATION AREA INC.STOR CUM.STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 43725 CF 31.0 10700 0 0 PEAK ELEVATION= 34.3 FT 32.0 12200 11450 11450 FLOOD ELEVATION= 35.0 FT 32.6 13100 7590 19040 START ELEVATION= 31.0 FT 33.0 13700 5360 24400 SPAN= 10-15 HRS, dt=.02 HRS 34.0 15300 14500 38900 Tdet= 77.6 MIN (1.35 AF) 34.5 17900 8300 47200 # ROUTE INVERT OUTLET DEVICES 1 P 31.0' 2" ORIFICE/GRATE Q=.6 PI r-2 SQR(2g) SQR(H-r) 2 P 32.6' 3' x .2' ORIFICE/GRATE X 2 Q=.6 Width 2/3 SQR(2g) (H^1.5 - (H-Height]"1.5) 3 P 34.2' 10' SHARP -CRESTED RECTANGULAR WEIR Q=C L H-1.5 C=3.27+.4 H/3 L=Length-0(.1 H) 4 S 34.3' 20' BROAD -CRESTED RECTANGULAR WEIR X 1.81 Q=C L E-1.5 C=1.72, 1.88, 1,98, 0, 0, 0, 0, 0 Primary Discharge F--1=Orifice/Grate �-2=Orifice/Grate 13=Sharp-Crested Rectangular Weir Secondary Discharge L-4=Broad-Crested Rectangular W Data for MR. STORE -IT, PHASE 2 Page 9 FIFTY YEAR 24-HOUR RAINFALL= 9.0 IN Prepared by ANDREW & KUSKE CONSULTING ENGINEERS,INC 25 Mar 97 HydroCAD 4.523 000479 (c) 1986-1996 Applied Microcomputer Systems REACH 1 POND OUTLET PIPE Qin = 14.45 CFS @ 12.44 HRS, VOLUME= 1.85 AF QOut= 12.74 CFS @ 12.30 HRS, VOLUME= 1.85 AF, ATTEN= 12e, LAG= 0.0 MIN DEPTH END AREA DISCH FT S -FT CFS 0.0 -0.0 0.00 .2 .1 .26 .3 .3 1.07 .5 .4 2.39 1.1 1.3 10.23 1.2 1.5 11.94 1.4 1.7 13.02 1.4 1.7 13.14 1.5 1.8 13.02 1.5 1.8 12.21 REACH 3 18" PIPE n= .01 LENGTH= 25 FT SLOPE= .008 FT/FT PIPE FROM Cl #3 TO FES #1 STOR-IND+TRANS METHOD PEAK DEPTH= 1.50 FT PEAK VELOCITY= 7.9 FPS TRAVEL TIME = .1 MIN SPAN= 10-15 HRS, dt=.02 HRS Qin='27.26 CFS @ 12.07 HRS, VOLUME= 2.48 AF Qout= 25.86 CFS @ 12.22 HRS, VOLUME= 2.48 AF, ATTEN= 5%-, LAG= 8.7 MIN DEPTH END AREA DISCH (FT) (SQ-FT) (CFS) 0.0 -0.0 0.00 .2 .2 .51 .4 .4 2.15 .6 .8 4.80 1.4 2.3 20.52 1.6 2.7 23.96 1.8 3.0 26.12 1.9 3.1 26.36 1.9 3.1 26.12 2.0 3.1 24.51 24" PIPE n= .012 LENGTH= 126 FT SLOPE= .01 FT/FT STOR-IND+TRANS METHOD PEAK DEPTH= 2.00 FT PEAK VELOCITY= 8.9 ?PS TRAVEL TIME = .2 MIN SPAN= 10-15 HRS, dt=.02 HRS REACH 4 PIPE FROM DI #4 TO Cl #3 Qin = 5.42 CFS @ 12.04 HRS, VOLUME= .26 AF QOut= 5.41 CFS @ 12.04 HRS, VOLUME= .28 AF, ATTEN= 06, LAG= DEPTH END AREA DISCH (FT) (S -FT) CFS 0.0 -0.0 0.00 .1 0.0 .19 .2 .1 .81 .3 .2 1.81 .7 .6 7.76 .8 .7 9.05 .9 .7 9.87 .9 .8 9.96 1.0 .8 9.87 1.0 _8 9.26 12" PIPE n= .01 LENGTH= 65 FT SLOPE= .04 FT/FT i 1 MIN STOR-IND+TRANS METHOD PEAK DEPTH= .54 FT PEAK VELOCITY= 12.5 FPS TRAVEL TIME = .1 MIN SPAN= 10-15 HRS, dt=.02 HRS Data for MR. STORE -IT, PHASE 2 Page 10 FIFTY YEAR 24-HOUR RAINFALL= 9.0 IN Prepared by ANDREW & KUSKE CONSULTING ENGINEERS,INC 25 Mar 97 H droCAD 4.523 000479 c 1986-1996 Applied Microcom uter systems REACH 5 PIPE FROM DI #5 TO DI #4 Qin = 2.21 CFS @ 12.04 HRS, VOLUME= .11 AF Qout= 2.18 CFS @ 12.05 HRS, VOLUME= .11 AF, ATTEN= 1%, LAG= .7 MIN DEPTH END (FT)_ (SQ-FT) AREA DISCH (CFS) 0.0 -0.0 0.00 .1 0.0 .12 .2 .1 .50 .3 .2 1.11 .7 .6 4.75 .8 .7 5.54 .9 .7 6.05 .9 .8 6.10 1.0 .8 6.05 1.0 .8 5.67 REACH 6 12" PIPE n= .ol LENGTH= 165 FT SLOPE= .015 FT/FT PIPE FROM MH #6 TO CI #3 STOR-IND+TRANS METHOD PEAK DEPTH= .42 FT PEAK VELOCITY= 7.0 FPS TRAVEL TIME = .4 MIN SPAN= 10-15 HRS, dt=.02 HRS Qin = 21.78 CFS @ 12.08 HRS, VOLUME= 2.16 AF Qout= 21.83 CFS @ 12.09 HRS, VOLUME= 2.16 AF, ATTEN= 0%, LAG= .4 MIN DEPTH END AREA DISCH (FT) (SO„ -FT) (CFS) 24" PIPE STOR-IND+TRANS METHOD 0.0 -0.0 0.00 PEAK DEPTH= 1.48 FT .2 .2 .51 n= .012 PEAK VELOCITY= 8.8 FPS .4 .4 2.15 LENGTH= 125 FT TRAVEL TIME = .2 MIN .6 .8 4.60 SLOPE= .01 FT/FT SPAN= 10-15 HRS, dt=.02 HRS 1.4 2.3 20.52 1.6 2.7 23.96 1.8 3.0 26.12 1.9 3.1 26.36 1.9 3.1 26.12 2.0 3.1 24.51 REACH 7 PIPE FROM Cl #7 TO MH #6 Qin = 3.79 CFS @ 12.07 HRS, VOLUME= .21 AF Qout= 3.78 CFS @ 12.08 HRS, VOLUME= .21 AF, ATTEN= 0%, LAG= .1 MIN DEPTH END FT S AREA -FT DISCH CFS 0.0 -0.0 0.00 .1 0.0 .14 .2 .1 .59 .3 .2 1.31 .7 .6 5.60 .8 .7 6.53 .9 .7 7.13 .9 .8 7.19 1.0 .8 7.12 1.0 .8 6.69 12" PIPE n= .012 LENGTH= 30 FT SLOPE= .03 FT/FT STOR-IND+TRANS METHOD PEAK DEPTH= .53 FT PEAT{ VELOCITY= 9.0 FPS TRAVEL TIME = .1 MIN SPAN= 10-15 HRS, dt=.02 HRS Data For MR. STORE -IT, PHASE 2 Page 11 FIFTY YEAR 24-HOUR RAINFALL= 9.0 IN Prepared by ANDREW & KUSKE CONSULTING ENGINEERS,INC 25 Mar 97 HydroCAD 4.523 000479 (c) _1.986-1996 Applied Microcomputer Systems REACH 8 PIPE FROM DI #8 TO Cl #7 Qin = 2.48 CFS @ 12.08 HRS, VOLUME= Qout= 2.47 CFS @ 12.09 HRS, VOLUME= DEPTH END AREA DISCH FT (SO -FT) CFS 12" PIPE 0.0 -0.0 0.00 .1 0.0 .l0 .2 .1 .41 .3 .2 .93 .7 .6 3.96 .8 .7 4.62 .9 .7 5.04 .9 .8 5.08 1.0 .8 5.04 1.0 .8 4.73 14 AF 14 AF, ATTEN= 1%, LAG= .6 MIN i n= .012 LENGTH= 120 FT SLOPE= .015 FT/FT STOR-IND*TRANS METHOD PEAK DEPTH= .50 FT PEAK VELOCITY= 6.2 FPS TRAVEL TIME = .3 MIN SPAN= 10-15 HRS, dt=.02 HRS REACH 9 PIPE FROM CI #9 TO MH #6 Qin = 19.78 CFS @ 12.09 HRS, VOLUME= 1.95 AF Qout= 18.00 CFS Q 12.08 HRS, VOLUME= 1.95 AF, ATTEN= 9%, LAG= 0.0 MIN DEPTH END (FT) (SO AREA -FT) DISCH (CFS) 0.0 -0.0 0.00 .2 .1 .38 .3 .3 1.58 .5 .4 3.52 1.1 1.3 15.06 1.2 1.5 17.59 1.4 1.7 19.18 1.4 1.7 19.35 1.5 1.8 19.18 1.5 1.8 17.99 REACH 10 01:�!2N»I n= .012 LENGTH= 110 FT SLOPE= .025 FT/FT PIPE FROM CI #10 TO Cl #9 STOR-IND+TRANS METHOD PEAK DEPTH= 1.50 FT PEAK VELOCITY= 11.6 FPS TRAVEL TIME = .2 MIN SPAN= 10-15 HRS, dt=.02 HRS Qin = 25.02 CFS @ 12.20 HRS, VOLUME= 1.85 AF Qout= 18.00 CFS @ 12.10 HRS, VOLUME= 1.85 AF, ATTEN= 28%, LAG= 0.0 MIN DEPTH END AREA DISCH (FT) (SO -FT) (CFS) 18" PIPE STOR-IND+TRANS METHOD 0.0 -0.0 0.00 PEAK DEPTH= 1.50 FT .2 .1 .38 n= .012 PEAK VELOCITY= 11.6 FPS .3 .3 1.58 LENGTH= 36 FT TRAVEL TIME = .1 MIN .5 .4 3.52 SLOPE= .025 FT/FT SPAN= 10-15 HRS, dt=.02 HRS 1.1 1.3 15.06 1.2 1.5 17.59 1.4 1.7 19.18 1.4 1.7 19.35 1.5 1.8 19.18 1.5 1.8 17.99 Data for MR. STORE -IT, PHASE 2 Page 12 FIFTY YEAR 24-HOUR RAINFALL= 9.0 IN ' Prepared by ANDREW & KUSKE CONSULTING ENGINEERS,INC 25 Mar 97 HvdroCAD 4.523 000479 c 1986-1996 Applied Microcom uter Systems POND 1 DETENTION POND #1 Qin = 28.90 CFS @ 12.05 HRS, VOLUME= 2.69 AF Qout= 21.43 CFS @ 12.44 HRS, VOLUME= 2.10 AF, ATTEN= 26%, LAG= 23.3 MIN Qpri= 14.45 CFS @ 12.44 HRS, VOLUME= 1.85 AF Qsec= 6.99 CFS @ 12.44 HRS, VOLUME= .25 AF ELEVATION AREA INC.STOR CUM.STOR (FT) (SF) (CF) (CF) 31.0 10700 0 0 32.0 12200 11450 11450 32.6 13100 7590 19040 33.0 13700 5360 24400 34.0 15300 14500 38900 34.5 17900 8300 47200 STOR-IND METHOD PEAK STORAGE = 47853 CF PEAK ELEVATION= 34.5 FT FLOOD ELEVATION= 35.0 FT START ELEVATION= 31.0 FT SPAN= 10-15 HRS, dt=,02 HRS Tdet= 62.2 MIN (2.09 AF) # ROUTE INVERT OUTLET DEVICES 1 P 31.0' 2" ORIFICE/GRATE Q=.6 PI r^2 SQR(2g) SQR(H-r) 2 P 32.6' 3' x .2' ORIFICE/GRATE X 2 Q=.6 Width 2/3 SQR(2g) (H-1.5 - [H-Height}'1.5) 3 P 34.2' 10' SHARP -CRESTED RECTANGULAR WEIR 'Q=C L H^1.5 C=3.27+.4 H/3 L=Length-0(.1 H) 4 S 34.3' 20' BROAD -CRESTED RECTANGULAR WEIR X 1.81 Q=C L H-1.5 C=1.72, 1.88, 1.98, 0, 0, 0, 0, 0 Primary Discharge f----1=Orifice/Grate F---2=Orifice/Grate L--3=Sharp-Crested Rectangular Weir Secondary Discharge I4=Broad-Crested Rectangu — — Andrew & Kuske CONSULTING ENGINEERS, INC. John R. Andrew, P.E. J.A. Kuske, P.E. J, Phillip Norris, P.E. 902 Market St.. Wilmington, North Carolina 28401-4733 • Telephone 910/343-9653 • Fax 910/343-9604 March 25, 1997 Ms. Linda Lewis NC DEHNR/Div. of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405-3845 Re: Mr. Store -It, Phase II New Hanover County DWQ Project No. SW8 970303 A&K Project No. 96217 Dear Ms. Lewis: MAR % 6 1997 BY Attached for your review are three copies each of revised plans and calculations. The revisions reflect your' comments of March 11 with the following similarly numbered comments or exceptions: 2. .dames Rice is President of Rice Development and Construction Co., Inc. 3. A plan is provided indicating off -site drainage. 4. A note was placed on the plans stating that the only wetlands are the creek channel along the west property line. 5. An easement will be recorded over the pond for access and drainage. 7. An energy dissipator detail has been added as the flow distribution device. 9. Pavement is shown on the off -site plan. 10. As these are two separate projects and owners, we cannot provide deed restrictions for off -site properties. However, the Sandridge project was approved and permitted prior to 1989. Any change would require Ms. Linda Lewis/NC DEHNR-DWQ March 25, 1997 Page 2 modification of the ' Grading Permit and therefore bring it under your review. 11. 1 have reviewed my calculation of impervious area and believe it to be correct. Sincerely, ANDREW & KUSKE CONSULTING ENGINEERS, INC. C. Lawrence Sneeden, Jr., P.E. CLSlsbs enclosures cc: Jim Rice/Rice Construction and Development Co. 96217-3 State of North Carolina Department of Environment, Health, and Natural Resources Wilmington Regional Office James B. Hunt, Jr. Division of Water Quality Jonathan B. Howes Governor Water Quality Section Secretary March 11, 1997 Mr. Larry Sneeden, P.E. Andrew and Kuske Engineers 902 Market Street Wilmington, NC 28401 Subject: ACKNOWLEDGEMENT OF RECEIPT AND REQUEST FOR ADDITIONAL INFORMATION Stormwater Project No. SW8 970303 Mr. Store -It, Phase II New Hanover County Dear Mr. Sneeden: The Wilmington Regional Office received a Stormwater Management Permit Application for Mr. Store -It, Phase II on March 3, 1997. A preliminary review of that information has determined that the application is not complete. The following information is needed to continue the stormwater review: 5. 6. 7. 8. A vicinity map on the plans. Title of James Rice. A map delineating the 5 acres of off -site drainage area, including contours. Delineate all wetlands on site, or note on the plans that none exist. Locate the pond in a recorded access/drainage easement. Seal the plans and calculations. be he "Vegetated Filter" detail. Detail the flow di ' .ution device. �64 25 0er1 � b Report the surface area provided at the storage pool. Indicate the extent of the`proposed Troy Drive pavement that will drain into this pond. 127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 0 Telephone 910-395-3900 0 Fax 910-350-2004 An Equal Opportunity Affirmative Action Employer Mr. Sneeden March 11, 1997 Stormwater Project No. SW8 970303 ON,10. D�h orh 11. Please note that this request for additional information is in response to a relimin review. The sp A ary requested information should be received by this Office prior to April 11, 1997, or the application will be returned as incomplete. The return of a project will necessitate resubmittal of all required items, including the application fee. Provide deed restrictions limiting Sandridge Phase 2 and 3 to 3.26 acres of impervious area. My calculation of the impervious area within Troy Drive as shown is over 6,000 ft2 mare than yours. If you have any questions concerning this matter please feel free to call me at (910) 395-3900. Sincerely, /-"�& A� - Ms. Linda Lewis Environmental Engineer RSSlarl: S:IWQSISTORMWATIADDINFO1970303.MAR cc: Linda Lewis Central Files 17 _= M 197�� John R. Andrew, P.E. Andrew & Kuske tJ J.A. Kuske, P.E. CONSULTING ENGINEERS, INC. ��+ J. Phillip Norris, P.E. 902 Market St. • Wilmington, North Carolina 28401-4733 • Telephone 910/343-9653 • Fax 910/343-9604 February 27, 1997 STORMWATER NC DEHNR Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405-3845 Attn: Ms. Linda Lewis Re: Mr. Store -It, Phase 2 New Hanover County A&K Project No. 96217 Dear Linda: Enclosed are three sets of plans for the subject project, calculations, the Division of Water Quality stormwater management permit application, and a $385.00 check for the processing fee. Please review this information for approval and contact us with any questions or comments you may have. Thank you for your assistance on this project. Sincerely, ANDREW & KUSKE CONSULTING ENGINEERS, INC. c z J-2,// C. Lawrence Sneeden, Jr., P.E. CLS/sbs enclosures cc: Jim Rice/Rice Construction and Development 962175W A&K Project No. 96217 POND MAINTENANCE REQUIREMENTS CONTINUED PAGE 2 IV. General A. Mow the side slopes, not including normally submerged vegetated shelf, according to the season. Maximum grass height will be 6" Q. Cattails, and other indigenous wetland plants, are encouraged along the pond perimeter; however, they must be removed when they cover the entire surface area of the pond. C. The orifice is designed to draw down the pond in 2-5 days. If drawdown is not accomplished in that time, the system may be clogged. The source of the clogging must be found and eliminated. D. All components of the detention pond system must be kept in good working order. V. Special Requirements. i, James Rice, Rice Const[Ltction and Development Co.Anc. , hereby acknowledge that I am the financially responsible party for maintenance of this detention pond. I will perform the maintenance as outlined above, as part of the Certification of Com nce with Storm ater Regulations received for this project: Signature: Date: a� ) A4—Cj 1 1, Ji,-r; oL `'j'}1 . _C O(ema ,r. , a Notary Public for the State of County of -A*Lk) Ha no J er _ , do hereby certify that personally appeared before me this 144 t' day of T'�_bv t&o - _ , 19 q and acknowledge the due execution of the foregoing instrument. Witness my hand and o My Commission Expires: 7 -.)-U -q-7 Epdf� !�P 9 ! QIARy. SEAL14 R Gw_.•er State of North Carolina Department of Environment, Health, and Natural Resources Wilmington Regional Office James B. Hunt, Jr. Division of Water Quality Jonathan B. Howes Governor Water Quality Section Secretary May 1, 1997 Mr. Larry Sneeden, P.E. Andrew and Kuske Engineers 902 Market Street Wilmington, NC 28401 Subject: ACKNOWLEDGEMENT OF RECEIPT AND REQUEST FOR ADDITIONAL INFORMATION Stormwater Project No. SW8 970303 Mr. Store -It Phase II New Hanover County Dear Mr. Sneeden: The Wilmington Regional Office received previously requested information for the Stormwater Management Permit Application for Mr. Store -It Phase II on April 14, 1997. 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. The vegetated filter is not a ditch section that is hydraulically connected such that the grassed area is underwater. The filter is supposed to act as a final polisher prior to the runoff being released to the stream. By drawing the contours as you have, and with the invert you show, a ditch section rather than a true vegetated filter has been created. Enclosed is a detail of the correct way to design a -vegetated filter. If this vegetated filter detail cannot be followed as shown, including the Ievel spreader, then the pond must be designed for 90% TSS removal. The flat topography around here does not lend itself to using a vegetated filter very often. 127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 • Telephone 910-395-3900 • Fax 910-350-2004 An Equal Opportunity Affirmative Action Employer N Mr. Sneeden May 1, 1997 Stormwater Project No. SW8 970303 . "A 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 June 1, 1997, 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 have any questions concerning this matter please feel free to call me at (910) 395-3900. Sincerely, Ms. Linda Lewis Environmental Engineer RSSlarl: S:IWQSISTORMWATIADDINFO1970303.MAY cc: Linda Lewis Central Files 4 VEGETATIVE FILTER rinw Spreader a -m N ttirni or M.m nil JAI- 41P 30 car SO Foot AD- - I I ter 41� AL 0- -Ar OUTLE I- TURIE 'R c-cr_- I \j I f-j -x so, m('O.-Fbr -aA w.-Jers. SECTIOK) /A -A DETE I,)To� D State of North Carolina Department of Environment, Health, and Natural Resources Wilmington Regional Office James B. Hunt, Jr. Division of Water Quality Jonathan B. Howes Governor Water Quality Section Secretary April 4, 1997 Mr. Larry Sneeden, P.E. Andrew and Kuske Engineers 902 Market Street Wilmington, NC 28401 Subject: ACKNOWLEDGEiVIENT OF RECEIPT AND REQUEST FOR ADDITIONAL INFORMATION Stormwater Project No. SW8 970303 Mr. Store -It Phase II New Hanover County Dear Mr. Sneeden: The Wilmington Regional Office received a Stormwater Management Permit Application for Mr. Store -It Phase II on March 26, 1997. A preliminary review of that information has determined that the application is not complete. The following- information is needed to continue the stormwater review: I. I find myself guessing as to how the map of off -site drainage correlates to the proposed plans. Does CI-2 on the map correspond to CI-9 on the proposed plans? Does the dark line across the pavement at that point signify the extent of the Troy Drive pavement that is collected into the new pond? 2. The energy dissipator device does not qualify as a flow distribution device. Please see the enclosed vegetated filter detail for information. The idea of the flow distribution device is to evenly disperse the runoff over the width of the filter to provide a non -erosive flow. 3. Please show the calculations for the velocity in the vegatated filter. I found Reach 1 out of the pond, but nothing else beyond that. 4. Will Mr. Rice accept the Sand Ridge runoff after they develop? Technically, they can propose up to 3.26 acres of impervious, new and existing, to be treated in the pond without additional ponds needed, and I can permit Sand Ridge as an off -sits system. 127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 • Telephone 910-395-3900 • Fax 910-350-2004 An Equal Opportunity Affirmative Action Employer Mr. Sneeden April 4, 1997 Stormwater Project No. SW8 970303 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 May 4, 1997, 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 have any questions concerning this matter please feel free to call me at (910) 395-3900. Sincerely, Ms. Linda Lewis Environmental Engineer RSS/arl: S:IWQSISTORMWAnADDINF01970303:APR cc: Linda Lewis Central Files 01 RECEIVED APR 14 1997 John R, Andrew, P.E. Andrew & Kuske BY: 1A. Kuske, P.E. CONSULTING ENGINEERS, INC. 1 Phillip Norris, P.E. 902 Market St.. Wilmington, North Carolina 28401-4733 • Telephone 910/343-9653 • Fax 910/343-9604 April 10, 1997 Ms. Linda Lewis NC DEHNR/Div. of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405-3845 Re: Mr. Store -It, Phase 2 Project # SW8 970303 A&K Project No. 96217 Dear Linda: We have reviewed your comments of April 5 and have the following responses: 1. Attached is a marked -up map of Sandridge showing upland drainage areas. If there is still some confusion, please call me so that we can meet and come to an understanding. 2 1 do not understand why the energy dissipator does not "qualify" as a flow distribution device. The 18" flared end section is 3 feet wide at its mouth (detail attached). Discharge from the flared end section flows across a riprap bed that is 8' wide by 10' long, which transitions the channel from 3' wide with 3.1 slopes at the flared end section to 2' wide with 5:1 slopes at the vegetated filter. It would be highly unlikely that the channel could transition from 3' wide down to 2' wide and the flow not be evenly distributed. It is my professional opinion that the design proposed will function far better than the device in the detail provided to us. We would like to see some justification for changing our design to an inferior system. 3. Calculations are attached for the vegetative swale, indicating a 1.6 fps velocity for a 10-year storm. 4. The plans, calculations, and applications for this project all clearly indicate the intention of Sandridge Apartments to discharge into the Mr. Store -it pond and for Mr. Store -It to accept it into the system. Mr. Rice is aware of Ms. Linda Lewis/Div. Of Water Quality April 10, 1997 Page 2 this discharge and included that in his negotiation to purchase this property form the Sandridge owners. Please contact us if further information is required. Sincerely, ANDREW & KUSKE CONSULTING ENGINEERS, INC. C. Lawrence Sneeden, Jr., P.E. CLSlsbs enclosures cc: Jim Rice/Rice Construction and Development 96217 Data for MR. STORE -IT, PHASE 2 Page 1 Prepared by ANDREW & KUSKE CONSULTING ENGINEERS,INC 10 Apr 97 Hy_droCAD 4.52.3 000479 (c)1986-1996 Applied Microcomputer Systems REACH 2 VEGETATED SWALE Qin = 8.41 CFS G 12.61 HRS, VOLUME= 1.34 AF Qout= 6.41 CFS 0 12.62 HRS, VOLUME= 1.34 AF, ATTEN= 0%, LAG= .5 MIN DEPTH END AREA DISCH _1FT)_ (SQ-FT) (CFS) 0.0 0.0 0.00 .2 .6 .41 .4 1.6 1.62 .6 3.0 3.80 .9 5.4 8.43 1.2 9.6 18.17 1.6 16.0 35.99 2.0 24.0 61.86 2' x 2' CHANNEL SIDE SLOPE= .2 n= .027 LENGTH= 30 FT SLOPE= .002 FT/FT STOR-IND+TRANS METHOD PEAK DEPTH= .86 FT PEAK VELOCITY= 1.6 FPS TRAVEL TIME = .3 MIN SPAN= 10-15 HRS, dt=.02 HRS Precast Concrete Flared End Sections i —rr. Q Oldcastle I.F7NCP REINFORCED :.1a�L.l,.:,:4 ..iha ',1' i"r,. 1 k. h1,. >.Y;fi• �r..�H "e. 'im 'r. ��!'.' e�Yk"!; i"r't�J?., -� Flexible Piastic Type Joints Specifications: N.C. Department of Transportation OD F I G L JE ID WALL 00 I L A B C E F G H J K M Wi 12 2 16 i 75 4 23 2 51 2 23 2 ' 14 4 13 4 13 e 13 4 1 1 a 722 15 24 19 a 7* 7 274 472 30 17a 164 17 162 2 2 1438 18 2 z 23 z 74 4 9 27 47 4 36 20 s 20 4 20 4 192 2 8 2 1425 24 3 30 e l EO 9 43 37 47 4 27 z 27 e 26 4 26 2 z 2 z 2137 30 3 � z 37 4 � 7 12 54 z 22 2 60 34 33 33 z 32 z 3 3 2990 36 4 44 97 i 16 60 37 z 71 40 s 40 39 39 3 z 3 z 3960 42 7 4 z 7 52 2 S 98 e 7 22 , ] 61 a 37 I 77 T 7 47 z 3 46 1 1 46 a t 45 s 4 4 3 Z 5160 48 5 59 z g- { 2S z 70 4 29 83 z 53 52 ; 52 z 51 4 i 3 s 6480 54 5 z 65 ; `i 1 C� 26 65 39 z 89 2 59 + 58 a 58 1 57 z 4 5 4 4 '- 4 9370 60 6 72 i { 1G3 z 28 z 57 2 46 96 65 85 64 4 64 4 4 4 4 11650 N.C. PRODUCTS P.O. BOX 27077 RALEIGH, NC 27611 (919) 772-6301 1-800-662-1983