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HomeMy WebLinkAboutSW8000220_Historical File_20130513ITI ��4AF HONOR North Carolina Department of Environment and Natural Resources Division of Water Quality Pat McCrory Charles Wakild, P. E. Governor Director May 13, 2013 Magnolia Greens Master Association, Inc. C/o Dennis Michaliga, President 2502 South 17".' Street Wilmington, NC 28401 Subject: Stormwater Permit No. SW8 000220 Name/Ownership Change and Permit Extension The Lakes at Magnolia Greens High Density Project Brunswick County Dear Mr. Michaliga: John E. Skvarla, III Secretary On August 5, 2009, the Governor signed Session Law 2009-406. This law impacts any development approval issued by the Division of Water Quality under Article 21 of Chapter 143 of the General Statutes, which is current and valid at any point between January 1, 2008, and December 31, 2010. The law extends the effective period of any stormwater permit that was set to expire during this time frame up to three (3) years from its current expiration date. On August 2, 2010, the Governor signed Session Law 2010-177, which granted an extra year for an extension of up to four (4) years. On March 22, 2013, the Division of Water Quality (DWQ) received a permit Name/Ownership Change Form from Landmark Developers, Inc. A file review and site inspection was performed on April 29, 2013 by DWQ and as noted in the enclosed inspection report, the site is currently in compliance with the terms and conditions of the current state stormwater permit. The Division is hereby notifying you that permit SW8 000220 has been transferred on May 13, 2013, and shall be effective until May 12, 2019, which includes the extensions. For your records, please find enclosed a copy of the updated page 2 of the previously issued permit, a copy of the inspection report, and a copy of the Name/Ownership Change form(s) submitted on March 22, 2013. Please attach this cover letter and updated page 2 to your permit originally issued on Mav 26, 2000 and as modified thereafter. This permit is subject to the conditions and limitations as specified in the previously issued permit. Please pay special attention to the conditions listed in this permit regarding the Operation and Maintenance of the BMP(s), recordation of deed restrictions, procedures for changes of ownership, transferring the permit, and renewing the permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system, to record deed restrictions, to transfer the permit, or to renew the permit, will result in future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing by filing.a written petition with the Office of Administrative Hearings (OAH). The written petition must conform to Chapter 150E of the North Carolina General Statutes, and must be filed with the OAH within thirty (30) days of receipt of this permit. You should contact the OAH with all questions regarding the filing fee (if a filing fee is required) and/or the details of the filing process at 6714 Mail Service Center, Raleigh, NC 27699-6714, or via telephone at 919-431-3000, or visit their website at www.NCOAH.com. Unless such demands are made this permit shall be final and binding. 1 i7 Cardin Regional Office N of x iCarolina 127 Cardinal Drive Extension, Wilmington, North Carolina 28405 / Phone: 910 796-72151 FAX: 910-350-20041 DENR Assistance:1-877-623-6748 l �atu�+a`` �/ Internet www.ncwaterqualky.org f� i/ An Equal Opportunity 1 AfArrnative Action Employer State Stormwater Management Permit # SW8 000220 If you have any questions, need additional copies of the permit or approved plans, please contact David Cox or Chris Baker with the Division of Water Quality in the Wilmington Regional Office at (910) 796-7215. Sincerely, r Charles Wakild, P.E., Director Division of Water Quality GDS/dwc: S:1WQS1Stormwater\Permits & Projects12000100022012013 05 permit 000220 cc: Chris Stephens Phil Norris Chris Baker Wilmington Regional Office Stormwater File Page 2of2 State Stormwater Management Systems Permit No. SW8 000220 Modification STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY DEVELOPMENT In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO Magnolia Greens Master Association, Inc. The Lakes @ Magnolia Greens Brunswick County FOR THE construction, operation and maintenance of a wet detention pond in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit. This permit shall be effective from the date of issuance until May 12, 2019 and shall be subject to the following specified conditions and limitations: 1. DESIGN STANDARDS 1. This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. 2. This stormwater system has been approved for the management of stormwater runoff as described in Section 1.6 on page 3 of this permit. The subdivision is permitted for 233 lots, each allowed a maximum amount of built -upon area. Lots 1A, 1 through 72 and 5-69 through 5-110 are limited to 5,000 square feet of built - upon area. Lots 5-1 through 5-68, 6-1 through 6-26 and 73 through 96 are limited to 4,000 square feet of built -upon area. 3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 4. All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans. 5. The detention pond is designed to store up to 8" of runoff without discharging. Offsite subdivisions permitted under SW8 020522, SW8 970104, and SW8 990628 are included in the drainange area of this pond. II. CURRENT PERMIT INFORMATION 1. Stormwater Management Permit Number: SW8 000220 2. Project Name: The Lakes at Magnolia Greens 3. Current Permitee's Company Name/Organization: Landmark Developers, Inc. 4. Signing Official's Name: W. Christopher Stephens Title: President 5. Mailing Address: 5022 Wrightsville Avenue, Suite 102 City: Wilmington State: NC 6. Phone: 9( 10 ) 392-7201 Fax: 9( 10 ) Zip: 28403 350-0610 III. PROPOSED PERMITTEE / OWNER / PROJECT / ADDRESS INFORMATION The proposed permittee identified in the condominium or planned community's declaration is the following (check one): ❑ Unit Owners Association © Owners Association ' G- L U 171 ❑ Other Management Entity Proposed Permittee's: 1. Company Name/Organization: Magnolia Greens Master Association, Inc. 2. Contact Name & Title (Please provide name of company/organization's authorized representative or agent and her/his official title such as President): Dennis Michaliga, President 3. Mailing Address: 2502 South 17th Street City: _ Wilmington State: NC Zip: 28401 4. Phone: (910 ) 395-15oo Fax: ( ) N/A ECEIVE IV. CURRENT PERMITTEE'S CERTIFICATION MAR 2 2 2013 I, W_ Christopher Stephens , the current permittee, am subting h��ct for a transfer of stormwater permit # mg oo022o . I hereby attest that I have met the requirements of N.C.G.S. 143-214.7(c2)/ Session Law 2011-256, and propose to transfer the permit to a unit owners association, owners association, or other management entity identified in the condominium or planned community's declaration. The common areas related to the operation and maintenance of the stormwater management system have been conveyed to the unit owners association or owners association in accordance with the declaration. I have provided a copy** of the most recent permit, the designer's certification for Pach BMP, any recorded deed restrictions, covenants, or easements, the DWQ approved plans and/or approved as -built plans, the approved operation and maintenance agreement, past maintenance records, and the DWQ stormwater inspection report evidencing compliance to the proposed permittee named in Section III of this form. I further attest that this request for a permit transfer is accurate and complete to the best of my knowledge. I understand that if all required parts of this request are not comDleted or if all required supporting information and attachments listed above are not included, this request package will be Page 2 of 3 I returned as incomplete. I assign all rights named in Section II of this form. I undersj DWQ unless and until the,fadilittis in c Signature: V '-/ obligations as permittee to the proposed permittee that this permit transfer cannot be approved by the .nce with the permit. Date: a Notary Public for the State of !j C , County of �r,,nswi�` , do hereby certify that V�1 • CIr v%40 piner ohe.,,s personally appeared before me this the 1 A- day of March , 20 13 , and acknowledge the due execution of the forgoing instrument. fitness y hand and official seal, pQeal) H. t ry Si ture •`�� a, La r1...( c,ornn�►, s sia►n �G AV BI.�G v ** it is recommended that all documents that are required for the transfer of this permit be sent by a traceable delivery method to the proposed permittee. Additional copies of the original permit and the approved Operation and Maintenance agreement can be obtained from the appropriate Regional Office of the Division of Water Quality. This completed form, including all supporting documents and the processing fee (if required), should be sent to the appropriate Regional Office of the North Carolina Department of Environment and Natural Resources, Division of Water Quality, as shown on the attached map. DWO Regional Office Contact Information: Asheville Office ...... (828) 296-4500 Fayetteville Office ... (910) 433-3300 Mooresville Office ... (704) 663-1699 Raleigh Office ........ (919) 791-4200 Washington Office... (252) 946-6481 Wilmington Office ... (910) 796-7215 Winston-Salem ...... (336) 771-5000 Central Office ......... (919) 807-6300 Page 3 of 3 Compliance Inspection Report Permit: SW8000220 Effective:05/12105 Expiration: 05/12/19 Project: The Lakes at Magnolia Greens Owner: Magnolia Greens Master Association Inc County: Brunswick Adress: NC Hwy 17 Region: Wilmington City/State/Zip: Belville NC 28451 Contact Person: George Steelberg Title: President Phone: Directions to Project: Located along the north right-of-way on Hwy 17 approx. 1000 ft. Northeast of the Hwy 17 and Lanvale Road interseciton. Type of Project: State Stormwater - HD - Detention Pond Drain Areas: 1 - (Jackeys Creek) (03-06-17) ( C;Sw) On -Site Representative(s): Related Permits: SW8970104 Magnolia Greens Master Association Inc - Magnolia Greens Golfcourse Master I SW8020522 Magnolia Greens Master Association Inc - Glendale at Magnolia Greens SW8990628 Magnolia Greens Master Association Inc - Fairway Village At Magnolia Greens Inspection Date: 04/2912013 Entry Time: 10:30AM Exit Time: 11:15AM Primary Inspector: Christopher Baker Secondary Inspector(s): Phone: Reason for Inspection: Routine Inspection Type: Transfer Renewal Permit Inspection Type: State Stormwater Facility Status: ® Compliant ❑ Not Curnpliant Question Areas: E State Stormwater (See attachment summary) page: 1 6 permit: SW8000220 Owner Project: Magnolia Greens Master Association Inc Inspection Date: 04/29/2013 Inspection Type Transfer Renewal Reason for Visit: Routine Inspection Summary: This stormwater system is in compliance with the terms and conditions of the permit. File Review Is the permit active? Signed copy of the Engineer's certification is in the file? Signed copy of the Operation & Maintenance Agreement is in the file? Copy of the recorded deed restrictions is in the file? Comment: Operation and Maintenance Are the SW measures being maintained and operated as per the permit requirements? Are the SW BMP inspection and maintenance records complete and available for review or provided to DWQ upon request? Comment: Yes No NA NE ❑ ❑ ❑ ❑ ❑ ❑ Yes No NA NE ❑ ❑ ❑ ❑ ❑ ❑ E page: 2 Norris & Tunstall 1127 Floral ParkwayConsulting Engineers, P.C. 1429 Ash -Little River Road Suite 400 Ash, NC 28420 Wilmington, NC 28403 (910) 287-5900 (910) 343-9653 (910) 287-5902 Fax (910) 343-9604 Fax John S. Tunstall, P.E. J. Phillip Norris, P.E. March 19, 2013 Ms. Jo Casmer NC DENR / Division of Water Quality \ Water Quality Section 127 Cardinal Drive Extension Wilmington, NC 28405-3845 l� Re: State Stormwater Permit Transfer of Ownership Magnolia Greens Brunswick County, NC N&T Project No. 12058 Dear Ms. Casmer: Enclosed are the permit transfer request forms for the following permits: SW8 970104 SW8 000131 SW8 981008 SW8 000220// SW8 990628 / SW8 020522 % SW8 990947A- SW8 020527 SW8 991136 Also enclosed are a copy of the master declaration of Protective Covenants for Magnolia Greens, a copy of Articles of Incorporation of Magnolia Greens Master Association, Inc., and the By Laws of Magnolia Greens Master Association, Inc. 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, NORRIS & TUNSTALL CONSULTING ENGINEERS, P.C. R 4 J Phillip rris, P 12058 03-19-13-s-sw-transfer-Itr Enclosures cc: W. Christopher Stephens / Landmark Developers, Inc. �G E. MAR 2 2 2013 BY: NCBELS License C-3641 Lewis,Linda From: Lewis,Linda Sent: Friday, September 28, 2012 12:37 PM To: 'Chris Stephens' Subject: The Lakes at Magnolia Greens SW8 000220 Chris I was going through my stack of unresolved inspections and found this one. Although I received Davis' pond evaluation, it was not sealed. It needs to be sealed. Also, it did not address all of the inspection points in my February 10, 2012 inspection report. I still need answers and written verification for the following: 1. An as -built survey of the pond's permanent pool (21.0) and temporary pool (23.5) surface areas. The pond configuration is different than permitted, so the as -built sheet will become a part of the approved plan set. Please make sure it is signed and sealed. 2. We discussed the repair/replacement of that rickety old flashboard riser outlet structure, but I have not received any proposed details for a new structure. 3. Vegetation — have the bare spots identified in the inspection report been beefed up? 4. Has the outlet ditch been cleaned out, resloped and stabilized? 5. Has the gravel check dam been removed? 6. Davis' report did not address the drawdown pump and irrigation system. I had requested that you provide calculations supporting the pump's ability to pump the full 8" volume to the irrigation system and spray irrigate it all within 2-5 days. As we discussed, although the pond is designed to store 8" of runoff (25 year storm back then), the street's piped collection system was only designed to convey a 10 year storm. I have already indicated to Melissa Juhan that as long as the runoff is staging within the drainage area and is not bypassing the pond, any flooding is not a permit violation and is not a "nuisance condition" under the alternative system rules since flooding is not regulated by the State nor is it covered by the rules. Furthermore, if the HOA wants to alleviate that flooding, they can do so after they take the permit. I have provided several suggestions to the HOA which include installing larger pipes, and adding a bypass line from the last catch basin to the larger pond on the other side of the road to alleviate the load on the smaller pond. The other issue raised by Greg Thompson, P.E., Southern Engineering, was about putting easements on the golf course fairways so that when the HOA becomes the permittee, they will have access to the fairway irrigation system, which is the permitted drawdown system for the approved pond. At one point I believe you indicated that Landmark would record these easements before turning the system over to the HOA. Is that still the plan? Do you have any idea when the turnover will take place? Thanks for any updates regarding these unresolved inspection issues that you can provide. I'd like to hear something back from you as soon as possible, but certainly by October 30, 2012. Linda Lewis NC Division of Water Quality 127 Cardinal Drive Ext. Wilmington, NC 28405 910-796-7215 E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. 0 COAST LINEt- E N G I N E E R I N Gn 2107 Laurel Oak Way office: (910) 338-5006 Memorm&jm To: Chris Stephens From: Davis Fennell CC: Leland, NC 28451 fay-• (910) 338-5202 Subject: The Lakes at Magnolia Greens — Pond Evaluation Date: 03/16/2012 Job No: 1230-100 As requested I have evaluated the storm pond within The Lakes at Magnolia Greens for compliance with permitted design criteria. The basis of this evaluation was the updated normal water surface provided by Michael Underwood and Associates. I assumed a minimum of at least 3:1 slopes above water for volume calculations. The permitted pond is actually made up of multiple, interconnected ponds treated as a single unit. There are 5 ponds that receive drainage and are connected linearly to a single discharge. No data was provided for the connecting pipes from the two uppermost ponds so they were ignored. For this reason the following results are conservative. The data for the three ponds was combined and analyzed as a single unit in the same fashion as presented in prior permitting documents. I found the surface area provided is more than 98% of what was -designed, or in substantial compliance with the permit. The associated volume is nearly 99% of what was designed, and is 109% of what is required, also in substantial compliance with the permit. A wet pond data sheet similar to what was originally submitted and approved is attached for your use. I also evaluated the interconnections between the ponds using the data developed above. In this case, each pond was modeled independently for drainage area, storage volume, and discharge. Hydraflow Hydrographs software was utilized to predict the reaction of these ponds to 8 inches of rainfall in 24 hours time. As the ponds are interconnected, and as these interconnections are the focus of this evaluation, the following parameters were assumed for the calculations: • The pond north of Pine Harvest Drive was modeled to discharge via a connector pipe to the pond between Pine Harvest Drive and Cornerstone Drive. • The pond south of Cornerstone Drive was modeled to discharge via connector pipes to the pond between Pine Harvest Drive and Cornerstone Drive. • The pond between Pine Harvest Drive and Cornerstone Drive was modeled with discharge via connector pipes to the ponds north of Pine Harvest Drive and south of Cornerstone Drive. • In all cases, it was assumed that the receiving ponds were full to the maximum stage from 8 inches of rainfall, calculated to be elevation 23.3 in the wet pond data sheet and represented as tail water in the storm model. The tail water elevation actually rises from 21 to 23.3 during the 24 hours of the storm event, so the results of the model are conservative. The results of the storm model are attached for your use. The model shows that even if the capacity of connector pipes is reduced by high water in the receiving pond(s), adequate storage volume is provided and the connector pipes provide ample discharge to regulate the maximum water volume to within 0.1 feet (1.2 inches), and still below the maximum elevation of 23.5. This model demonstrates that the pipes installed to interconnect the ponds, as installed, are adequate to move water as required between the ponds to maintain nearly identical water levels in each pond. Please note that the large pond between Pine Harvest Drive and Cornerstone Drive appears to have no discharge to the other ponds in this storm event. This is due only to the assumption that the other ponds are already full to the elevation 23.3 -- the large pond has enough storage that the water level would only rise to match this elevation, even from 8 inches of rain, so the model shows no flow. If the actual elevation of adjoining ponds were to be modeled at the various elevations experienced in an actual storm, the large middle pond would show discharge to the adjoining ponds. As only the worst case scenario is evaluated here, that additional analysis was not performed. In summary, the interconnected ponds that make up the permitted non -discharge pond have sufficient surface area and storage volume to be in substantial compliance with the original design and the permitted criteria. 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I HydrographReturn Period Recap....................................................................... 2 25 - Year SummaryReport................................................................................................................... 3 HydrographReports...............................'......................................................................... 4 Hydrograph No. 1, SCS Runoff, NORTH PHD ................................................................... 4 Hydrograph No. 3, SCS Runoff, PHD - CSD...................................................................... 5 Hydrograph No. 5, SCS Runoff, SOUTH CSD................................................................... 6 Hydrograph No. 7, Reservoir, S-CSD THRU POND.......................................................... 7 Pond Report - SOUTH CSD......................................................................................... 8 Hydrograph No. 9, Reservoir, PHD-CSD POND.............................................................. 10 PondReport - PHD - CSD........................................................................................... 11 Hydrograph No. 11, Reservoir, N. PHD POND................................................................ 13 PondReport - NORTH PHD........................................................................................ 14 OFReport............................................................................................................. is Watershed Model SchematicHydraflowHydrographsExtension for AutoCADOCivil 3D®2012byAutodesKInc, v9 1 Legend -H>f6- Orlain Description 1 SCS Runoff NORTH PHD I 3 SCS Runoff PHD - CSD I 5 SCS Runoff SOUTH CSD 7 Reservoir S-CSD THRU POND 9 Reservoir PHD-CSD POND 11 Reservoir N. PHD POND Project POND ROUTING.gpw Monday, 0019, 2012 2 Hydrograph Return Period a reIlaydrographs Extension for AutoCAD9 Civil 3DO 2012 by Autodesk, Inc. v9 Hyd. No. Hydrograph type (origin) Inflow hyd(s) Peak Outflow (cfs) Hydrograph Description 1-yr 2 yr 3-yr 5-yr 110-yr 2"r 50-yr 100-yr 1 SCS Runoff --- - ---- - - 56.73 --- — NORTH PHD 3 SCS Runoff --- - -- - - - 128.74 — --- I PHD - CSD 5 SCS Runoff i -- - --- -- - - 101.94 — — SOUTH CSD 7 Reservoir 5 — ---- — 14.73 --- S-CSD THRU POND 9 Reservoir 3 — — — — 0.000 - - - -- PHD-CSD POND 11 Reservoir 1 --- - - - I 17.36 — N. PHD POND Proj. file: POND ROUTING.gpw Monday, 0019, 2012 3 Hydrograph Summary Re po odraflow Hydrographs Extension forAutoCAD® Civil 3136 2012 by Autodesk, Inc. v9 Hyd. No. Hydrograph type (or)gin) Peak flow (cis) Time interval (min) Time to Peak (min) Hyd. volume (cuff) Inflow hyd(s) Maximum elevation (ft) Total strge used (cufo Hydrograph Description 1 SCS Runoff 56.73 2 760 III 458,381 --- - -- NORTH PHD I 3 SCS Runoff I 128.74 2 754 I 957,607 i — I — I PHD -CSD 5 SCS Runoff 101.94 2 722 270,348 ---- SOUTH CSD 7 Reservoir 14.73 2 750 146,652 5 23.35 126,798 S-CSD THRU POND 9 Reservoir 0.000 2 n/a 0 ;d.02 957,607 PHD-CSD POND 11 Reservoir 17.36 2 828 223.028 1 23.38 244,475 N. PHD POND POND ROUTING.gpw Return Period: 25 Year ! Monday, 0019, 2012 Hydrograph Report Hydraflow Hydrographs Extension forAutoCADD Civil 3139 2012 by Autodesk, Inc. v9 Hyd. No. 1 NORTH PHD Hydrograph type = SCS Runoff Peak discharge Storm frequency = 25 yrs Time to peak Time interval = 2 min Hyd. volume Drainage area = 45.100 ac Curve number Basin Slope = 1.0 % Hydraulic length Tc method = LAG Time of conc. (Tc) Total precip. = 8.00 in Distribution Storm duration = 24 hrs Shape factor Q (dsil 60.00 50.00 40.00 30.00 20.00 10.00 4 Monday, 00 19, 2012 = 56.73 cfs = 760 min = 458,381 cult = 55 = 1175 ft = 71.10 min = Type II = 484 Q (Cfs) 60.00 50.00 40.00 30.00 20.00 10.00 0.00 0.00 0 120 240 360 480 800 720 840 960 1080 1200 1320 1440 1560 ---- Hyd No. 1 Time (min) S Hydrograph Report Hydraflow Hydrographs Extension for AutoCADO Civil 3D® 2012 by Autodesk, Inc. v9 Monday, 00 19, 2012 Hyd. No. 3 PHD - CSD Hydrograph type = SCS Runoff Peak discharge = 128.74 cfs Storm frequency = 25 yrs Time to peak = 754 min Time interval = 2 min Hyd. volume = 957,607 cuft Drainage area = 95.350 ac Curve number = 55 Basin Slope = 1.0 % Hydraulic length = 1040 ft Tc method = LAG Time of conc. (Tc) = 64.50 min Total precip. = 8.00 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Q (cfs) 140.00 120.00 100.00 80.00 40.00 20.00 PHD - CSD Hyd. No. 3 -- 25 Year 0.00 ' 0 120 240 360 480 600 --•- Hyd No. 3 Q (cfs) 140.00 120.00 100.00 80.00 40.00 20.00 ' i ' ' ' ' 0.00 720 840 960 1080 1200 1320 1440 1560 Time (min) 6 Hydrograph Report Hydraflow Hydrographs Extension for AutoCAD® Civil 3D® 2012 by Autodesk, Inc. v9 Monday, 0019, 2012 Hyd. No. 5 SOUTH CSD Hydrograph type = SCS Runoff Peak discharge = 101.94 cfs Storm frequency = 25 yrs Time to peak = 722 min Time interval = 2 min Hyd. volume = 270,348 cuff Drainage area = 25.940 ac Curve number = 55 Basin Slope = 1.0 % Hydraulic length = 1190 ft Tc method = KIRPICH Time of conc. (Tc) = 10.72 min Total precip. = 8.00 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Q (cfs) 120.00 100.00 80.00 60.00 40.00 20.00 SOUTH CSD Hyd. No. 5 — 25 Year Q (Cfs) 120.00 100.00 40.00 20.00 0.00 1 1 1.. " 1 1 1 1- 0.00 0 120 240 360 460 600 720 840 960 1080 1200 1320 1440 1560 — Hyd No. 5 Time (min) Hydrograph Report 7 Hydraflow Hydrographs Extension for AutoCAD® Civil 3D® 2012 by Autodesk, Inc. v9 Monday, 0019, 2012 Hyd. No. 7 S-CSD THRU POND Hydrograph type = Reservoir Peak discharge = 14.73 cfs Storm frequency = 25 yrs Time to peak = 750 min Time interval = 2 min Hyd. volume = 146,652 cuft Inflow hyd. No. = 5 -SOUTH CSD Max. Elevation = 23.35 ft Reservoir name = SOUTH CSD Max. Storage = 126,798 cuft Storage Indication method used. Q (cfs) i 20.00 - 100.00 80.00 60.00 40.00 20.00 S-CSD THRU POND Hyd. No. 7 — 25 Year Q (cfs) 120.00 100.00 80.00 60.00 40.00 20.00 0.00 ' I 0.00 0 120 240 360 480 800 720 840 960 1080 1200 1320 1440 1560 Time (min) — Hyd No. 7 — Hyd No. 5 Total storage used=126,798 cult Pond Report $ Hydraflow Hydrographs Extension for AutoCAD® Civil 3D® 2012 by Autodesk, Inc. v9 Monday, 00 19, 2012 Pond No. 5 - SOUTH CSD Pond Data Contours JAer-defined contour areas. Conic method used for volume calculation. Begining Elevation = 21.00 ft Stage I Storage Table stage (ft) Elevation (ft) Contour area (sgft) Inor. Storage (cult) Total storage (tuft) 0.00 21.00 47,794 0 0 1.00 22.00 52,941 50,341 50,341 2.00 23.00 58,150 55,520 105,860 2.50 23.50 80,779 29,727 135,587 3.00 24.00 63,423 31,045 186,632 Culvert I Orifice Structures Weir Structures [A] [B] [C] [Pd [A] [B] [C] [D] Rise (in) = 24.00 36.00 0.00 0.00 Crest Len (ft) = 20.00 0.00 0.00 0.00 Span (in) = 24.00 36.00 0.00 0.00 Crest El. (ft) = 23.50 0.00 0.00 0.00 No. Barrels = 1 1 0 0 Weir Coeff. = 2.60 3.33 3.33 3.33 Invert El. (ft) = 20.21 22.06 0.00 0.00 Weir Type = Broad - - - Length (ft) = 100.00 100.00 0.00 0.00 Multi -Stage = No No No No Slope (%) = 0.00 0.00 0.00 n/a N-Value = .013 .013 .013 n/a Orifice Coaff. = 0.60 0.60 0.60 0.60 Exfll.(irt/hr) = 0.000 (by Contour) Multi -Stage a n1c No No No TW Etay. ft = 23.30 Notes CutverVOrittce outflows are enelyzed under Inlet (tc) end outlet (cc) Control. Weir deers dieckad for odes Condition (le) and submergence (s). Stage I Storage I Discharge Table Stage Storage Elevation Clv A CIV B Civ C PriRsr Wr A Wr B Wr C Wr D Exfll User Total ft tuft ft cis cfs cfs cfs Cfs cis cis Clio cfe cfs cis 0.00 0 21.00 0.00 0.00 - - 0.00 - - 0.10 5,034 21.10 0.00 0.00 - - 0.00 - - 0.20 10,068 21.20 0.00 0.00 --- - 0.00 - -- 0.30 15,102 21.30 0.00 0.00 - - 0.00 - - 0.40 20,136 21.40 0.00 0.00 - -- 0.00 - - 0.50 25,170 21.60 0.00 0.00 - --- 0.00 0.60 30,204 21.60 0.00 0.00 -- - 0.00 - 0.70 35,238 21.70 0.00 0.00 -- -- 0.00 - - 0.80 40,272 21.80 0.00 0.00 - - 0.00 -- 0.90 45,308 21.90 0.00 0.00 - - 0.00 - -- 1.00 50,341 22.00 0.00 0.00 -- -- 0.00 - - 1.10 55,893 22.10 0.00 0.00 -- - 0.00 - 1.20 61,444 22.20 0.00 0.00 --- - 0.00 -- 1.30 66,996 22.30 0.00 0.00 - - 0.00 - -- 1.40 72,548 22AO 0.00 0.00 - - 0.00 - 1.50 78,10a 22.50 0.00 0.00 - - 0.00 - - 1.60 83,652 22.60 0.00 0.00 - -- 0.00 -- -- 1.70 89,204 22.70 0.00 0.00 - -- 0.00 - - 1.80 94,756 22.80 0.00 0.00 - - 0.00 - - 1.90 100,308 22.90 0.00 0.00 - - 0.00 -- 2.00 105,860 23.00 0.00 0.00 - - 0.00 - - 2.05 108,833 23.05 0.00 0.00 --- - 0.00 - - 2.1.0 111,808 23.10 0.00 0.00 - - 0.00 - - 2.15 114,778 23.15 0.00 0.00 - - 0.00 - 2.20 117,751 23,20 0.00 0.00 - - 0.00 -- -- 2.25 120,724 23.25 0.00 0.00 - - 0.00 - -- 2.30 123,696 23.30 0.00 0.00 - - 0.00 - 2.35 126,669 23.35 3.38 is 11.25 is - - 0.00 - - 2.40 129,642 23.40 4.78 (c 12.04 is - - 0.00 - - 2.45 132,614 23.45 5.86 Ic 12.88 is - - 0.00 -- - 2.50 135,587 23.50 6.76 is 13.72 (c - - 0.00 - - 2.55 138,692 23.55 7.56 is 14.57 is - 0.58 - - 2.60 141,796 23.60 8.28 is 15.44 is - - 1.64 - - 2.65 144,901 23.65 8.95 is 16.36 Ic - - 3.02 - - 2.70 148,005 23.70 9.57 is W.25 io - - 4.66 - - 2.75 151,110 23.75 10.151c 18.161c - - 6.50 - - - - 0.000 - 0.000 - - -- 0.000 -- - 0.000 -- - 0.000 0.000 -- - - 0.000 - 0.000 0.000 - 0.000 -- 0.000 - - -- 0.000 - - 0.000 -- - - 0.000 - -- 0.000 - 0.000 - - -- 0.000 -- --- - 0.000 -- - - 0.000 - - - 0.000 - - - 0.000 - 0.000 0.000 0.000 - - 0.000 - -- 0.000 0.000 14.63 -- - 16.82 - - 18.74 20.48 - - - 22.71 25.37 28.32 - - 31.47 34.81 Continues on next page... SOUTH CSD Stage / Storage / Discharge Table Stage Storage Elevation ClvA ft cuft ft cfs 2.80 154.214 23.80 10.69 1s 2.85 157,319 23.85 11.22 is 2.90 160,423 23.90 11.721c 2.95 163,528 23.95 12.19 is 3.00 166,632 24.00 12.65 is ...ErW Clv B Clv C PrfRsr Wr A Wr B Wr C Wr D Exfil User Total cfs cis cis cis cis cis cfs efs efs cfs 19.11 is — — 8.54 — — — — -- 38.35 20.04 is — — 10.77 — — — — — 42.03 21.01 is — -- 13.16 -- — -- -- 45.88 21.97 is — — .15.70 -- — -- -- — 49.86 22.94 is — — 18.38 -- -- — -- — 53.98 10 Hydrograph Report Hydraflow Hydrographs Extension for AutoCAD® Civil 3138 2012 by Autodesk, Inc. v9 Monday, 0019, 2012 Hyd. No. 9 PHD-CSD POND Hydrograph type = Reservoir Peak discharge = 0.000 cfs Storm frequency = 25 yrs Time to peak = n1a Time interval = 2 min Hyd. volume = 0 cuft Inflow hyd. No. = 3 - PHD - CSD Max. Elevation = 23.02 ft Reservoir name = PHD - CSD Max. Storage = 957,607 cuff Storage Indication method used. Q (cfs) 140.00 120.00 iIIIIIIII7 80.00 60.00 40.00 20.00 PHD-CSD POND Hyd. No. 9 -- 25 Year Q (cfs) 140.00 120.00 100.00 80.00 40.00 20.00 0.00 0.00 0 120 240 360 480 600 720 •840 960 1080 1200 1320 1440 1560 Time (min) — Hyd No. 9 — Hyd No. 3 FFFI l n Total storage used = 957,607 cult Pond Report 11 Hydraflow Hydrographs Extension forAutoCAD® Civil 3D® 2012 by Autodesk, Inc. v9 Monday, 00 19,2012 Pond No. 3 - PHD - CSD Pond Data Contours -User-defined contour areas. Conic method used for volume calculation. Begining Elevation = 21,00 ft Stage / Storage Table Stage (ft) Elevation (ft) Contour area (sqft) Incr. Storage (cult) Total storage (cuff) ! 0.00 21.00 445,514 0 0 j 1.00 22.00 474,902 460,084 460,084 2.00 23.00 504,357 489,507 949,591 2.50 23.50 519,092 255,828 1,205,418 3.00 24.00 533,833 263,197 1.468,616 Culvert I Orifice Structures Weir Structures [A] [B] [C] IPrfRsri [A] [B] [C] IDl Rise (in) = 48.00 24.00 36.00 0.00 Crest Len (ft) = 0.00 0.00 0.00 0.00 Span (In) = 48.00 24.00 36.00 0.00 Crest El. (ft) = 0.00 0.00 0.00 0.00 No. Barrels = 1 1 1 0 WeirCoeff. = 3.33 3.33 3.33 3.33 Invert El. (ft) = 17.39 20.21 22.06 0.00 Weir Type = - - - --- Length (ft) = 100.00 100.00 100.00 0.00 Multi -Stage No No No No Slope (%) = 0.00 0.00 0.00 n/a N Value = .013 .013 .013 n/a Orifice Coeff. 0.60 0.60 0.60 0.60 Exfil.(iNhr) - 0.000 (by Contour) Muitl dam We KID Iva KID 'J'W Elan. (ft) - 23.30 Mote: CulveRlQAf ce "w a are analyzed under inlet pc) and oudot (ac) *antral. weir rivers ducked fororiflce conditions (ic) and sutxnsrpanoa (a). Stage I Storage / Discharge Table Stage Storage Elevation Civ A Civ B Civ C PrMsr Wr A Wr B Wr C Wr D Exfll User Total ft cuff ft cis cis efa afs cfs cfs cis efs efs efa efe 0.00 0 21.00 0.00 0.00 0.00 - - - -- - -- - 0.000 0.10 46,008 21.10 0.00 0.00 0.00 - - - - - - 0.000 0.20 92,017 21.20 0.00 0.00 0.00 -- - - -- - 0.000 0.30 138,025 21.30 0.00 0.00 0.00 --- - --- --- -- - 0.000 0.40 184,034 21.40 0.00 0.00 0.00 - -- -- -- - -- 0.000 0.50 230,042 21.50 0.00 0.00 0.00 -- - - 0.000 0.60 276,050 21.60 0.00 0.00 0.00 - - 0.000 0.70 322,059 21.70 0.00 0.00 0.00 - - - -- - - 0.000 0.80 368,067 21.80 0.00 0.00 0.00 - - - 0.000 0.90 414,075 21.90 0.00 0.00 0.00 - - - - 0.000 1.00 460,084 22.00 0.00 0.00 0.00 - - - - - 0.000 1.10 509,034 22.10 0.00 0:00 0.00 - - - -- 0.000 1.20 567,986 22.20 0.00 0.00 0.00 - - - - 0.000 1.30 606,936 22.30 0.00 0.00 0.00 - -- - -- 0.000 1.40 655,887 22.40 0.00 0.00 0.00 - - - -- - - -- 0.000 1.50 704,837 22.50 0.00 0.00 0.00 - - - - - - - 0.000 1.60 763,788 22.60 0.00 0.00 0.00 - - - 0.000 1.70 802,739 22.70 0.00 0.00 0.00 - - - - - - - 0.000 1.80 851,689 22.80 0.00 0.00 0.00 - - - -- - -- 0.000 1.90 900,640 22.90 0.00 0.00 0.00 -- - - - - 0.000 2.00 949,591 23.00 0.00 0.00 0.00 - --- - M_ - 0.000 2.06 975,173 23.05 0.00 0.00 0.00 --- - - -- -- - - 0.000 2.10 1,000,756 23.10 0.00 0.00 0.00 - - - - - - - 0.000 2.15 1,026,339 23.15 0.00 0.00 0.00 - - - - - - 0.000 2.20 1,051,922 23.20 0.00 0.00 0.00 - - - - - - - 0.000 2.25 1,077,505 23.25 0.00 0.00 0.00 - -- -- - - - 0.000 2.30 1,103.087 23.30 0.00 0.00 0.00 - - - - - 0.000 2.36 1,128,670 23.36 13.53 is 3.3B is 11.25 is - - - - - - 28.16 2.40 1,164,253 23.40 19.13 is 4.781c 12.04Ic - - - - - -- 35.96 2.45 1,179.836 23.45 23.431c 5.861c 12.88 is - - - - - - - 42.17 2.60 1,205,418 23.50 27.06 is 6.76 ie 13.72 ie - - - - - - - 47.54 2.55 1,231,738 23.55 30.25 is 7.56 is 14.57 is - -- - - - - 52.38 2.60 1,258,058 23.60 33.14 le 8.28 is 15.441c - - - - - - 56.86 2.65 1,284,377 23.65 35.79 is 8.95-1c 16.36 is - - -- - - - - 61.10 2.70 1,310,697 23.70 38.26 is 9.67 is 17.25 )c - - - - - - - 65.08 2.76 1,337,017 23.75 40.58 is 10.1510 18.1610 - - - - - - - 68.89 Continues on nextpage... PHD-CSD Stage / Storage 1 Discharge Table Stage Storage Elevation Civ A ft cuft ft Cfs 2.80 1,363,336 23.80 42.78Ic 2.85 1,389,656 23.85 44.87Ic 2.90 1,415,975 23.90 46.86 !c 2.95 1,442,295 23.95 48.78 lc 3.00 1,468,615 24.W 50.62 is ...End 12 Clv B Clv C PrfRsr Wr A Wr B Wr C Wr D Exfil User Total Cfs cfs efs cis Cfs Cfe cfs Cfs Cis efs 10.69 !c 19.11 !c -- — — - -- — --- 72.59 11.22 is 20.04 is — — — — — — 76.13 11.72 is 21.01 is -- -- - --- - - 79.58 12.19 is 21.97 Ic — -- — — --- --- — 82.94 12.65 is 22.94 !c - - — -- — — 86.22 13 Hydrograph Report Hydraffow Hydrographs Extension forAutoCAD® Civil 31302012 by Autodesk, Inc. v9 Monday, 0019, 2012 Hyd. No. 11 N. PHD POND Hydrograph type = Reservoir Peak discharge = 17.36 cfs Storm frequency = 25 yrs Time to peak = 828 min Time interval = 2 min Hyd. volume = 223,028 cuft Inflow hyd. No. = 1 -NORTH PHD Max. Elevation = 23.38 ft Reservoir name = NORTH PHD Max. Storage = 244,475 cuft Storage Indication method used. 61111101 40.00 30.00 20.00 10.00 0.00 0 120 240 -- Hyd No. 11 N. PHD POND Hyd. No. 11 — 25 Year 360 480 600 720 Hyd No. 1 Q Oft) ISOM E flxlIf, 40.00 30.00 20.00 10.00 0.00 840 960 1080 1200 1320 1440 1560 Total storage used = 244,475 cult Time (min) Pond Report 14 Hydraflow Hydrographs Extension for AutoCADS Civil 3DO 2012 by Autodesk, Inc. v9 Monday, 0019, 2012 Pond No. 7 - NORTH PHD Pond Data Contours -User-defined contour areas. Conic method used for volume calculation. Regifti; Elevation = 21.00 ft Stage / Storage Table Stage (ft) Elevation (ft) Contour area (sgft) Incr. Storage (cult) Total storage (tuft) 0.uu 21.00 95,982 0 0 1.00 22.00 101,436 98,687 98,687 2.00 23.00 106,948 104,169 202,856 2.50 23.50 109,723 54,181 257,017 3.00 24.00 112,510 65,551 312.568 Culvert / Orifice Structures Weir Structures [A] [BI [C] [PrfRsr] [A] [B] [C] [D] Rise (in) = 48.00 0.00 0.00 0.00 Crest Len (ft) - 0.00 0.00 0.00 0.00 Span (in) = 48.00 0.00 0.00 0.00 Coast El. (ft) = 0.00 0.00 0.00 0.00 No. Barrels = 1 0 0 0 Weir Coeff. = 3.33 3.33 3.33 3.33 Invert El. (ft) 17.39 0.00 0.00 0.00 Weir Type = - - - - Length (ft) 100.00 0.00 0.00 0.00 Multi -Stage = No No No No Slope (%) = 0.00 0.00 0.00 n/a N Value = .013 .013 .013 n/a Orifice Coeff. = 0.60 0.60 0.60 0.60 Exfll.(Inlhr) = 0.000 (by Contour) Multi -Stage = n/a No No No TW Elev. (ft) = 23.30 Note: CulvertfOrIDce wffi s are analyzed under inlet pc) and outlet (oc) control. weir dun ducMd for arlffce condrdons (Ic) and submargenoe (a). Stage / Storage / Discharge Table Stage Storage Elevation Clv A Clv B CIv C PrfRar Wr A Wr B Wr C Wr D Exfll laser Total ft curt ft cfs cis cis eft Cfs eft cfs efs cfs C% efs 0.00 0 21.00 0,00 -- - -- - -- - - - 0.000 0.10 9,869 21.10 0.00 - - - - - - -- -- 0.000 0.20 19,737 21.20 0.00 - - - --- --- 0.000 0.30 2906 21.30 0.00 - - - - - -- - 0.000 0.40 39,475 21.40 0.00 - - - - - -- -- -- 0.000 0.50 49,343 21.50 0.00 - - 0.000 0.60 59,212 21.60 0.00 - - - -- - - --- 0.000 0.70 69,081 21.70 0.00 - - - - -- - - - - 0.000 0.80 78,949 21.80 0.00 - - --- - -- 0.000 0.90 88,818 21.90 0.00 - - -- - 0.000 1.00 98,687 22.00 0.00 - - -- - - - - - - --- 0.000 1.10 109,104 22.10 0.00 - - -- - - - - - -- -- 0.000 1.20 119,521 22.20 0.00 - -- - - - - - - - 0.000 1.30 129,937 22.30 0.00 - -- - - - - - - - 0.000 1.40 140,354 22.40 0.00 - - - - - - - 0.000 1.50 150,771 22.60 0.00 -- - - - - - -- - - 0.000 1.60 161,188 22.60 0.00 --- - - -- -- - - - 0.000 1.70 171,605 22.70 0.00 - - - _ - _ _ _ _ 0.000 1.80 182,022 22.80 0.00 - -- - -- - - - - - 0.000 1.90 192,439 22.90 0.00 --- - - - - - - - -- 0.000 2.00 202,856 23.00 0.00 - - - - - - -- --- - 0.000 2.05 208,272 23.06 0.00 - - - --- - - - -- - 0.000 2.10 213,688 23.10 0.00 - - - - - - - - -- 0.000 2.15 219,104 23.15 0.00 - - -- -- -- - --- -- 0.000 2.20 224,520 23.20 0.00 - -- - - --- - -- 0.000 2.2E 229,937 23.25 0.00 - - - - - - - - - - 0.000 2.30 235,353 23.30 0.00 - - -- - - - - - -- 0.000 2.36 240,769 23.35 13.53 is - - - - - - - - - 13.53 2.40 246,185 23.40 19.13 [o - 19.13 2.45 251,601 23.45 23.43 is ---- - -.. _ - - - - 23.43 2.50 257,017 23.50 27.06 is - - - - - - - - 27.06 2.55 262,572 23.55 30.26Ic - - - - - - - - - 30.25 2.60 268,127 23.60 33.14 is - - - - - - - - 33.14 2.65 273,682 23.65 35.79 [c - - -- - - - - - - 35.79 2.70 279,237 23.70 38.26 is - - - - - - - - - 38.26 2.75 284,793 23.75 40.58 is -- - - - - - - - - 40.58 Con0hues on next page... w NORTH PHD Stage / Storage / Discharge Table Stage Storage Elevation Civ A Civ B Civ C PrFRsr Wr A Wr B Wr C Wr D Exfil User Total it cult ft Cfs oft Cfs Cfs Cfs Cfs Cfa CfS Cfs Cfs CfS 2.80 290,348 23.80 42.781c -- -- - - --- --- --- --- --- 42.78 2.85 295,903 23.85 44.87 IC - --- --- - -- - 44.87 2.90 301,458 23.90 46.86 is -- --- --- --- - - - - 46.86 2.95 307,013 23.95 48.78 iC - --- --- - - - 48.78 3.00 312,568 24.00 50.62 is — — — -- — -- - — - 50.62 ...End Hydraflow Rainfall Report 16 Hydraflow Hydrographs Extension for AutoCAD® Civil 3DO 2012 by Autodesk, Inc. v9 Monday, 00 19, 2012 Return Period (Yrs) Intensitv-Duratlon-Frequency Equation Coefficients (FHA) IS D E (NIA) 1 0.0000 0.0000 0.0000 --- 2 52.4381 10.7000 0.8910 -- - 3 0.0000 0.0000 0.0000 5 50.7701 9.3000 0.8202 10 52.1525 8.8000 0.7917 - ------ 25 48.0406 7.5000 0.7364 50 43.3749 6.3000 0.6891 -------- 100 42.7260 5.8000 0.6641 File name: Tsays Valley.IDF Intensity = B ! (Tc + D)AE Return Period Intensity Values (In/hr) (Yrs) 5 min 10 15 20 26 30 35 40 46 50 55 60 1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2 4.51 3.53 2.91 2.48 2.17 1.93 1.74 1.59 1.46 1.35 1.26 1.18 3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5 5.73 4.48 3.71 3.18 2.80 2.50 2.27 2.08 1.92 1.78 1.67 1.57 10 6.53 5.11 4.24 3.65 3.21 2.88 2.62 2.40 2.22 2.07 1.94 1.83 25 7.48 5.84 4.85 4.18 3.70 3.33 3.04 ' 2.80 2.80 2.43 2.29 2.16 50 8.18 6.34 5.27 4.56 4.04 3.65 3.34 3.09 2.88 2.70 2.54 2A1 100 8.80 6.83 5.69 4.93 4.39 3.97 3.64 3.37 3.15 2.96 2.79 2.65 Tc = time in minutes. Values may exceed 60. Pnw-ln No nemo• C-Welf mnvo Ama nnlio 9M ownnFKiR-nwn a wnu 9SVR ...... Storm Rainfall Precipitation Table (in) Distribution 1-yr 2-yr 3 yr 6 yr 10-yr 26-yr 50-yr 100-yr SCS 24-hour 0.00 0.00 0.00 0.00 0.00 8.00 0.00 0.00 SCS o-Hr ` 0.00 10.00 10.00 0.00 0.00 0.00 0.00 0.00 I I Huff -1st 10.00 0.00 0.00 0.00 0.00 0.00 ! 0.00 0.00 1 Huff-2nd 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Muff-3rd 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Huff-4th 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Huff-lndy 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Custom 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Lewis,Unda From: Lewis,Linda Sent: Wednesday, February 15, 2012 5:15 PM To: 'Chris Stephens' Cc: Scott, Georgette Subject: RE: The Lakes... Magnolia Greens Thanks for the flashboard riser plans, Chris. I was really hoping to get a copy of the approved one and a copy of an approval letter from Rhonda. The detail is not something that I would have approved as there is nothing to support the flashboard structure — it is set into "backfill" only. I am glad to hear that you and Carver are looking at alternatives to make that outlet device more permanent while being able to keep the emergency drain function in preparation for large rain events. Just so you know, Melissa Juhan and her husband Chuck have asked Greg Thompson, P.E., Southern Engineering, to look into the flooding issue. I spoke with Greg today and he had a few questions that, when answered, might have a bearing on this project. I'll be speaking to my supervisor about his questions this week. He reminded me that the permit is an "alternative" design which doesn't allow for the creation of nuisance conditions. He is pushing me to consider the occasional flooding at the intersection at Trail Pines Court and Morning View Way as a "nuisance condition". He also asked me why this was not a permit violation. Technically, this pond should be able to accommodate any rain event up to and including 8" under normal antecedent wetness conditions without any part of it staging beyond the 23.5 temporary pool elevation. The flooding may also be due to the size of and/or the condition of the equalization pipes. This non -discharge system was presented to us for permitting with the understanding that the water levels would rise and fall as one. If the equalization pipes are not sized to allow that, I believe Greg might have a point. Greg is pushing for us to require the engineer to prove that the equalization pipes are adequately sized to keep the water level in the three upper pond areas equal with the lower pond areas. He proposed that the engineer perform a hydraulic grade line analysis to see where the highest stage is occurring. Greg also thought a possible temporary fix could be to add another pump in those 3 upper pond areas to keep them from staging up too high. This pump would pump into the lower pond areas and not into the irrigation system. Greg also expressed some concern about the ability of the HOA to access the irrigation system lines in the fairways to maintain them in the event that the golf course is abandoned or defunct. You know that the permitted BMP "system" has to be in a recorded easement or common area. Greg wants us to consider the golf course irrigation lines as part of the "system" because it is a vital part of the permitted drawdown mechanism for the pond. The HOA needs to be able to access the irrigation system for maintenance should that become necessary. Alternatively, if the golf course is abandoned or defunct, the HOA could just propose to convert the pond to a normal discharging pond, which would require the addition of a vegetated shelf, forebays, orifice, etc. Greg was also concerned about the ability of the pump to draw down the pond's volume in 2-5 days. For whatever reason, we don't have any pump design calculations or pump curves in our files to judge whether the pump is adequate or not to provide the necessary drawdown time. Can you oblige me with a copy of those calculations? Thanks, Linda Lewis NC Division of Water Quality 127 Cardinal Drive Ext. Wilmington, NC 28405 910-796-7215 E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. From: Chris Stephens [mailto:wcstephens@landmco.com] Sent: Wednesday, February 15, 2012 3:40 PM To: Lewis,Linda Subject: The Lakes... Magnolia Greens Linda: Great to talk with you yesterday regarding Magnolia Greens and the overall transition we are beginning this year with permits and the official HOA stuff. You had mentioned that the pond outlet repairs/maintenance was the most important matter of the inspection items you listed in your 2/10/2012 letter. Also you were unable to locate the plan that went with the weir or flashboard riser outlet system. I have discussed with Carver Wilson, our field supervisor, to quickly look at the outlet and repair the existing design so that it is functioning properly so that the pond retains the proper level. We may further redesign this outlet pending the ongoing debate of the need to have an un-required pond draining mechanism to react to threatening flood level rains. Apparently the Public Works department at Leland removed the flash -boards pre -Irene last fall and they have not been replaced. Like you and I discussed, a more permanent structure may be the answer. I have just leaned that the Golf Course has suggested that since they can pump this lake down for a storm event by transferring the water to other ponds on the course that are not storm treatment ponds thereby eliminating the need to lose the water completely. We will try to make "the most" happy with this. 1 did find my copy of the plan revision sheet that details the flash -board riser... not much to it. The cover letter states that this outlet structure was approved as a plan revision and that a permit revision was not necessary. See attachments .... I can get you a full page copy of this if this scan is inadequate. We have advised the property manager, CEPCO, to ask the maintenance crews to identify any bare spots of vegetation and re -grass those as necessary. While we are there with the outlet repair we will review the pond depths at the cross over pipes under Cornerstone drive. I actually looked at this yesterday myself but there was too much algae in that particular area to see the real bottom. The gravel check dam is the previous location of the outlet dam for the pond system. It was left in place to keep the main lake from completely draining during the flash -board riser construction. It remains at lower than the 23.5 outlet design. No problem to remove it... but it doesn't impede water flow above the 23.5 mark .... my guess it's at 21 or 22. I am working on the deed restrictions list of recorded book and page numbers for you .... a number of amendments! Thank you, Chris W. Chris Stephens Landmark Companies 910-392-7201 office 910-350-0610 fax 910-540-9714 cell PO Box 4127 Wilmington. NC 28406 i e 2114,A6 z Is Apt oil ,,Qaa22e��iit Q E %I I as r,w I 1 I I I I I •.,, I IK, I I I I I I � I I I I 11 II I I I I I I I npy I I I I I I I I I I 3V 1 LL to J 0 V) 4 4 } Vf Q w Of }L 1L1 Cl V iJv} Q (ti�lloi 1 Fs i W W C') V U 00 lz {� - A N to - u wow 'ZI ! AN lei North Carolina Secretary of State Page 1 of 2 North Carolina Elaine F !Marshall DEPARTMENT OF THE Secretary SECRETARY OF STATE PO Box 29622 Raleigh, NC 27626-0622 (919)607-2000 Date: 2/10/2012 Click here to: View Document Filings 1 Sign Up for E-Notifications j J Print apre-populated Annual Report Form I File an Annual Report Corporation Names Name Name Type NC LANDMARK DEVELOPERS, INC. LEGAL NC GPS, INC. PREV LEGAL Business Corporation Information SOSID: 0297295 Status: Current -Active Effective Date: 12/6/1991 Annual Report Due Date: Citizenship: DOMESTIC State of Inc.: NC Duration: PERPETUAL Annual Report Status: CURRENT Registered Agent Agent Name: STEPHENS, B REX Office Address: Mailing Address: PO BOX 4127 WILMINGTON NC 28406 Principal Office Office Address: 5022 WRIGHTSVILLE AVE WILMINGTON NC 28403-7044 Mailing Address: P O BOX 4127 WILMINGTON NC 28406 Officers PRESIDENT Name: W CHRISTOPHER STEPHENS Business Address: P O BOX 4127 WILMINGTON NC 28406 Title: SECRETARY Name: B REX STEPHENS Business Address: P O BOX 4127 WILMINGTON NC 28406 Title: VICE PRESIDENT Name: KEVIN MCCARTHY Business Address: P O BOX 4127 WILMINGTON NC 28406 http://www.secretary.state.nc.us/corporations/Corp.aspx?Pitemld=4951848 2/10/2012 North Carolina Secretary of State Page 2 of 2 Class Shares No Par Value Par Value COMMON 1000000 1 This website is provided to the public as a part of the Secretary of State Knowledge Base (SOSKB) system. Version: 2139 http://www.secretary.state.nc.us/corporations/Corp.aspx?PitemId=4951848 2/10/2012 CD-479 (42) Business Corporation North Carolina An 11-22-10 This report may be filed online at the Secretary of State website: www.1 SOSED: 0297295 Date Filed: 4125/20112:59:00 PM Elaine F. Marshall North Carolina Secretary of State z CA201119200146 Name of Bus. Corporation: LANDMARK DEVELOPERS, INC. Fiscal Year Ending: 12 31 10 3tate oif incorporation: NC Month / Day ! Year Secretary of State ID Number: 0297295 n I hereby certify that an annual report completed in its entirety has been submitted and the information requested below (required by L I NCGS 55-16-22) has not changed and is therefore complete. Nature of Business: REAL ESTATE DEVELOPMENT Registered Agent: B REX STEPHENS Registered Office Mailing Address: 5022. WRIGHTSVILLE AVENUE County; NEW HANOVER City: WILMINGTON State: NC zip Code: 2 8 4 0 3 Registered Office street Address: PO BOX 4127 County: NEW HANOVER City: WILMINGTON State: NC zip Code; 28406 Signature of New Registered Agent: (Signature constitutes consent to the appointment) Principal Office Telephone Number. 910 - 3 9 2 W 7 2 01 Principal Office Mailing Address; PO BOX 4127 City- WILMINGTON state: NC zip Code: 2 8 4 0 6 Principal Office Street Address: 5022 WRIGHTSVILLE AVENUE City: WILMINGTON State: NC zipCode:28403 Name, Tide, and Business Address of Principal Officers; Name: W CHRISTOPHER STEPHENS Title: PRESIDENT Address: PO BOX 4127 City: WILMINGTON State: NC Tip: 2 8 4 0 6 Name: B REX STEPHENS Title: SECRETARY Address: PO BOX 4127 City: WILMINGTON State: NC zfp: 28406 Name: KEVIN L MCCARTHY Title: TREASURER Address: PO BOX 4127 City: WILMINGTON State: NC zip: 28406 --• •ter ^• %---• - -ap-au uy all ousmeas Wrporations). a4 M-41 Z. t9 Signature (Form must be s' ned by an officer of corporation) B REX STEPHENS_ Type or Print Name 5F-CRl 1-Al2y Title Lewis,Linda From: Lewis,Linda Sent: Friday, February 10, 2012 11:27 AM To: 'Melissa Juhan' Cc: hepnerr@bellsouth.net Subject: The Lakes at Magnola Greens SW8 000220 Melissa: You'll be glad to know that the compliance inspection of this project was conducted yesterday. You'll be even more glad to know that the compliance situation is not nearly as dire as you thought it might be. I inspected 7 aspects of the project, as I gleaned from our conversations and meetings: The emergency outlet is in a state of disrepair and appears to be allowing runoff to escape through the riprap, around and under the existing flashboard riser structure. Additionally, the elevation of the top board does not appear to be at the correct elevation of 23.5. 1 say this based on the fact that due to the dry weather, the water level was down about a foot, so that means there should have been about 3.5' of clearance between the water surface and the top board elevation. There was maybe 2 feet at the most. 2. 1 think most of what you've been seeing as "erosion" on the slopes is actually just the exposed pond slope below the normal water line. The dry weather has caused the water elevation to drop about a foot, exposing the slopes below. This can lead to undercutting and erosion, which has occurred in 2 places. The slopes below the normal water level (21.0 fmsl) are not regulated by the permit. I found the slopes above the normal water level to be close enough to 3:1 in most areas, and only two or three isolated areas with steeper slopes. I also found the vegetation on the slopes for the most part, to be more than adequate. There were some bare spots and sparse vegetation on the fairway side of the pond between Pine Harvest Drive and Cornerstone Drive that could be beefed up somewhat. 3. The fairway area between Davis Court and Morning View Way was apparently extended across a portion of the pond, filling it in. This created a smaller pond area which has been connected to the larger ponds on either side of it via equalization pipes under the fairway. However, another area of the pond next to Cornerstone Drive was expanded beyond the limits shown on the plans, so the two areas probably cancel each other out. What was taken away in one area may have been provided for in another. 4. The pond's depth may be in question. I observed lots of shallow vegetation on the bottom near the banks, so it could be that the silt has accumulated to the point that it needs to be removed. Only a canoe trip into the middle of the pond with a measuring device will provide confirmation of the actual depths. 5. 1 was able to visually observe all equalization pipes. Because the water level was low and it was clear, I could see the pipes. The tops were not covered over with sediment, but that doesn't mean sediment hasn't accumulated in them. It is possible that even if the sediment is removed from the pipes, the water levels during a rain event and for a few hours afterward might not be exactly the same, but I believe that they do eventually equalize. It depends of course, on the size of the individual pond, and on how much runoff each individual area receives. If a relatively smaller pond, like the pond off of Morning View Way, receives a disproportionately large share of runoff, it is possible that the water level in the smaller pond might jump up higher than the other adjacent larger ponds for a time. Unless the water level gets so high that it starts bypassing the pond completely, I can't consider this a permit violation or a compliance issue at this time. The term bypassing means that the runoff that should be entering the pond goes somewhere else. It's not an ideal situation, but it's not a permit violation for it to stand in the yards or in the streets within the drainage area for a while until the water level in the smaller pond reaches equilibrium with the larger pond. There's really no other place for it to go, as this pond is the only drainage outlet available. When the HOA becomes the permittee, they would be free to add more equalization pipes between the ponds at different elevations, or upsize the existing ones. A more expensive option would be to remove the road fill and bridge the span of open water or replace the pipes with large box culverts. Both options would allow full and unrestricted free flow of water between the ponds, and possibly eliminate or reduce the flooding. 6. The small pond off of Trail Pines Court, in the power line right-of-way, does not appear to be connected to the permitted pond system in any way. I walked the perimeter of the pond and could not find any evidence of a piped connection anywhere. My best guess is that if this pond were to overflow, there are 2 possible directions it could go. One would be into the nearest golf course pond between Fairways 11 and 14, or into the adjacent street (Trail Pines Court). If it were to get into the street, then the catch basins and piping in Trail Pines Court would convey it to the permitted pond, which would be a permit violation. However, the grade in that area suggests that the overflow will most likely go into the closest golf course pond first. We may need to revisit the site during a flooding event to verify the direction of overflow. It appears that it would have to overcome a lot of grade difference to get into the permitted pond or into the street. Although I find the situation of an impoundment of water with no outlet to be a potential flooding nuisance, it is not a permit violation until some proof is offered that it overflows into the permitted pond or into the street. I cannot base permit violations on allegations. 7. The pond levels appeared to be pretty equal to me. Sometimes the eye can be fooled in this regard because the top elevation of the pond slope in one pond on one side of the road may be higher than the top elevation of the pond slope in the pond on the other side of the road, giving the illusion that the water level is lower in the pond with the higher slope elevation. Of course, only an as -built survey can confirm that, but to my experienced eye, I saw no problem with the current water levels. Please refer to item #5 for a more detailed discussion of this issue. I think that should address your seven major concerns. The inspection report will be mailed to Landmark today and should be available to the public by the end of next week. Linda Lewis NC Division of Water Quality 127 Cardinal Drive Ext. Wilmington, NC 28405 910-796-7215 E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. ��* NCDE North Carolina Department of Environment and Natural Resources Division of Water Quality Beverly Eaves Perdue Charles Wakild, P. E. Dee Freeman Governor Director Secretary February 10, 2012 Chris Stephens, President Landmark Developers, Inc. PO Box 4127 Wilmington, NC 28406 Subject: NOTICE OF INSPECTION The Lakes at Magnolia Greens Stormwater Permit No. SW8 000220 CI'Ir15 Brunswick County Dear Mrr., hens: On February 9, 2012, Linda Lewis of the Wilmington Regional Office of the Division of Water Quality (DWQ) inspected The Lakes at Magnolia Greens off of Highway 17, Belville/Leland, in Brunswick County to determine compliance with Stormwater Management Permit Number SW8 000220 issued on May 12, 2005. DWQ file review and site inspection revealed that the site is not in compliance with the terms and conditions of this permit. Please find a copy of the completed form entitled "Compliance Inspection Report" attached to this letter, which summarizes the findings of the recent inspection. As indicated in the attached inspection report, the following deficiencies must be resolved: 1. Provide a copy of the recorded deed restrictions specific to this area of Magnolia Greens. 2. Due to changes in the pond's surface area, provide an as -built survey of the pond and revised calculations to demonstrate that the minimum required surface area and volume have been provided. 3. Check the pond's depth for sediment accumulation and remove any accumulated silt such that the four (4) foot design depth is provided and such that the equalization pipes can function more effectively to maintain equal water levels between the connected ponds. 4. Repair the flashboard riser outlet structure to keep runoff in the pond. The top board must be set at the temporary pool elevation of 23.5. 5. The August 2007 plan revision is not in our files. Please provide a copy of the proposed plans that were submitted for approval. This is not a compliance issue, but rather an issue of lost records on our part. 6. Overall, the vegetation was very good. A few bare spots and sparsely vegetated areas of the pond slopes need attention. 7. Restore the outlet ditch leading from the outlet structure. It is partially blocked off due to sediment accumulation, and the slopes are in extremely poor condition. 8. A gravel check dam has been added across the narrow arm of the pond just before the outlet structure. What is the purpose of this check dam? Wilmington Regional Office 127 Cardinal Drive Extension, Wilmington, North Carolina 28405 One Phone: 910-796-72151 FAX 910-350-20041 DENR Assistance:1-877-623-6748 NO Carolina Internet: www.nciMerqualky.org dura!!r� An Equal Opportunity 1 Affirmative Acton Employer Mr. Stephens February 10, 2012 SW8 000220 Please inform this Office in writing before March 10, 2012, of the specific actions that will be undertaken and the time frame that will be required to correct the deficiencies. Failure to provide the requested information, or to respond to this letter by the due date, may initiate enforcement action including the assessment of civil penalties of up to $25,000 per day. If a written plan of action is not submitted to this office by March 10, 2012, then DWQ staff will re -inspect the site and issue a Notice of Violation if the listed deficiencies have not been addressed. Please be reminded that if you are planning to turn over the pond to the HOA, it is your responsibility to submit a completed and signed Name/Ownership Change form to the Division prior to the turnover. After these deficient items are addressed, the Division will conduct a follow- up inspection to determine the status of compliance. The project must be in compliance before the permit is transferred to the HOA. If you have any questions, please contact me at the Wilmington Regional Office, telephone number (910) 796-7301, via email at linda.lewisCcD-ncdenr.gov. ti i4z;�4u ncerely, Linda Lewis Environmental Engineer III Enc: Compliance Inspection Report GDS/arl: S:1WQS1Stormwater\Permits & Projects120001000220 HD12012 02 CEI_deficient 000220 cc: Karen Higgins, WBS-CPU Davis Fennell, P.E., Coastline Engineering WiRO Stormwater File DWQ Central Files Page 2 of 2 Compliance Inspection Report Permit: SW8000220 Effective: 05/12/05 Expiration: 05/12/15 Owner: Landmark Developers Inc Project: Magnolia Greens Patio Homes II County: Brunswick NC Hwy L7 Region: Wilmington Belville NC 28451 Contact Person: Bert Exum Title: President Phone: 910-392-7201 Directions to Project: Located along the north right-of-way on Hwy 17 approx. 1000 ft. Northeast of the Hwy 17 and Lanvale Road interseciton. Type of Project: State Stormwater - HD - Detention Pond Drain Areas: 1 - (lackeys Creek) (03-06-17 ) ( C;Sw) On -Site Representative(s): Related Permits: SW8970104 Landmark Developers Inc - Magnolia Greens Golfcourse Master Plan SW8020522 Landmark Developers Inc - Glendale at Magnolia Greens SW8990628 Landmark Developers Inc - Fairway Village At Magnolia Greens Inspection Date: 02/09/2012 Entry Time: 12:45 PM Primary Inspector: Alida R Lewis Secondary Inspector(s): Reason for Inspection: Complaint Permit Inspection Type: State Stormwater Facility Status: Q Compliant ■ Not Compliant Question Areas: 0 State Stormwater (See attachment summary) Exit Time: 02:15 PM Phone: 910-796-7215 Inspection Type: Compliance Evaluation Page: 1 Permit: SW8000220 Owner - Project: Landmark Developers Inc Inspection Date: 02/09/2012 Inspection Type: Compliance Evaluation Reason for Visit: Complaint Inspection Summary: The following deficiencies were noted: 1. A copy of the recorded deed restrictions for this section of Magnolia Greens has not been submitted. 2. The pond surface area has changed due to a reduction in area in one part and an increase in surface area in another part. 3. The pond's depth needs to be checked to make sure accumulated ailt has not reduced the pond's depth below 4 feet. 4. The condition of the outlet structure and the elevation of the flashboard riser appears to allow runoff to escape the pond prior to reaching its storage elevation of 23.5. 5. The plan revision that was submitted in August 2007 is not in the file. 6. Vegetation on the slopes is good in most places, but there are some bare spots and some sparsely vegetated places that need attention. 7. The outlet ditch leading from the pond is in extremely poor condition. 8. A gravel check dam has been added across the arm of the pond that leads to the outlet structure. 9. The equalization pipes may need to be cleaned out and the accumulated silt removed to facilitate equal water levels. To bring this system into compliance, please address the following: 1. Submit a copy of the recorded deed restrictions. 2. Submit an as -built survey of the pond and revised calculations demonstrating that the minimum required surface area and volume have been provided. 3. Check the pond for any sediment accumulation and remove as required to maintain a 4 foot depth. 4. Repair the outlet structure to design condition and keep the top board in the riser at the correct elevation. It is suggested that a more functional, stable and accessible outlet structure be provided. 5. Submit a copy of the approved August 2007 plans and a copy of the plan revision approval letter. 6. Provide permanent vegetation on the bare spots and sparsely vegetated areas. 7. Restore the outlet ditch - remove sediment, provide 3:1 side slopes, and vegetate the slopes. 8. Provide the purpose of the gravel check dam. 9. Clean out the sediment from the equalization pipes. Page: 2 Permit: SW8000220 Owner - Project: Landmark Developers Inc Inspection Date: 02/09/2012 Inspection Type: Compliance Evaluation File Review Is the permit active? Signed copy of the Engineer's certification is In the file? Signed copy of the Operation & Maintenance Agreement is in the file? Copy of the recorded deed restrictions is in the file? Comment: 1. A copy of the recorded deed restrictions for this area of Magmolia Greens has not been submitted. SW Measures Are the SW measures constructed as per the approved plans? Are the inlets located per the approved plans? Are the outlet structures located per the approved plans? Reason for Visit: Complaint Comment: 2. The surface area of the pond appears to differ from the approved plan. In one area, adjacent Morning View Way, a portion of the pond has been filled to accommodate the golf course fairway and a cart path, resulting in the loss of surface area and volume. Further southeast, adjacent Cornerstone Drive, it appears that pond area has been added behind the fairway. Operation and Maintenance Are the SW measures being maintained and operated as per the permit requirements? Yes No NA HE Yes No NA NE 0000 Yes No NA NE ❑ ■ ❑ ❑ Are the SW BMP inspection and maintenance records complete and available for review or provided to DWQ ❑ ❑ ❑ ■ upon request? Comment: 3. The pond's depth may be in question. A lot of shallow vegetation could be seen. 4. The outlet stucture is not faring well. This structure is allowing the runoff in the pond to drain through, around and under the flashboard riser. The structure must hold back the runoff in the pond up to elevation 23.5. The top board did not appear to be set at the proper elevation. The water level was down 1 foot, so at the time of this inspection there should have been at least 3.5 feet from the water surface to the top board elevation. There was only 1.5-2 feet. 5. A plan revision was delivered to DWQ on August 3, 2007 with details of the modified outlet structure. However, neither these plans nor an approval letter can be located. I need to get a copy of that 2007 approved plan and a copy of the approval letter. 6. The vegetation on the slopes is very good in most places. There are a few areas where the grass is sparse and bare spots are evident. Other WQ Issues Yes No NA NE Page: 3 Permit: SW8000220 Owner - Project: Landmark Developers Inc Inspection Date: 02/09/2012 Inspection Type: Compliance Evaluation Is the site compliant with other water quality issues as noted during the inspection? Reason for Visit: Complaint Comment: 7. The outlet ditch after the flashboard riser is in extremely poor condition. The slopes are nearly vertical and extremely eroded, there's no vegetation on the slopes and there's a lot of silt accumulated in the ditch, which has partially blocked it off. 8. A gravel check dam has been added across the narrrow channel that leads to the outlet structure. 9. The tops of most of the equalization pipes were visually located. These pipes may need to be cleaned out of any accumulated sediment to facilitate "equalization" of the water levels in the various connected ponds. ❑ ■ O ❑ Page: 4 Compliance Inspection Report Permit: SW8000220 Effective: 05/12/05 Expiration: 05/12/15 Owner: Landmark Developers Inc Project: Magnolia Greens Patio Homes II County: Brunswick NC Hwy L7 Region: Wilmington Belville NC 28451 Contact Person: Bert Exum Title: President Phone: 910-392-7201 Directions to Project: Located along the north right-of-way on Hwy 17 approx. 1000 ft. Northeast of the Hwy 17 and Lanvale Road interseciton. Type of Project: State Stormwater - HD - Detention Pond Drain Areas: 1 - (Jackeys Creek) (03-06-17 ) ( C;Sw) On -Site Representative(s): Related Permits: SW8970104 Landmark Developers Inc - Magnolia Greens Golfcourse Master Plan SW8020522 Landmark Developers Inc - Glendale at Magnolia Greens SW8990628 Landmark Developers Inc - Fairway Village At Magnolia Greens Inspection Date: 02/09/2012 Entry Time: 12:45 PM Exit Time: 02:15 PM Primary Inspector: Alicia R Lewis Phone: 910-796-7215 Secondary Inspector(s): Reason for Inspection: Complaint Inspection Type: Compliance Evaluation Permit Inspection Type: State Stormwater Facility Status: ❑ Compliant IN Not Compliant Question Areas: 0 State Stormwater (See attachment summary) Page: 1 Permit: SW8000220 Owner - Project: Landmark Developers Inc Inspection Date: 02/0912012 Inspection Type: Compliance Evaluation Reason for Visit: Complaint Inspection Summary: The following deficiencies were noted: 1. A copy of the recorded deed restrictions for this section of Magnolia Greens has not been submitted. 2. The pond surface area has changed due to a reduction in area in one part and an increase in surface area in another part. 3. The pond's depth needs to be checked to make sure accumulated ailt has not reduced the pond's depth below 4 feet. 4. The condition of the outlet structure and the elevation of the flashboard riser appears to allow runoff to escape the pond prior to reaching its storage elevation of 23.5. 5. The plan revision that was submitted in August 2007 is not in the file. 6. Vegetation on the slopes is good in most places, but there are some bare spots and some sparsely vegetated places that need attention. 7. The outlet ditch leading from the pond is in extremely poor condition. 8. A gravel check dam has been added across the arm of the pond that leads to the outlet structure. 9. The equalization pipes may need to be cleaned out and the accumulated silt removed to facilitate equal water levels. To bring this system into compliance, please address the following: 1. Submit a copy of the recorded deed restrictions. 2. Submit an as -built survey of the pond and revised calculations demonstrating that the minimum required surface area and volume have been provided. 3. Check the pond for any sediment accumulation and remove as required to maintain a 4 foot depth. 4. Repair the outlet structure to design condition and keep the top board in the riser at the correct elevation. It is suggested that a more functional, stable and accessible outlet structure be provided. 5. Submit a copy of the approved August 2007 plans and a copy of the plan revision approval letter. 6. Provide permanent vegetation on the bare spots and sparsely vegetated areas. 7. Restore the outlet ditch - remove sediment, provide 3A side slopes, and vegetate the slopes. 8. Provide the purpose of the gravel check dam. 9. Clean out the sediment from the equalization pipes. Page: 2 Permit: SW8000220 Owner - Project: Landmark Developers Inc Inspection Date: 02/09/2012 Inspection Type: Compliance Evaluation File Review Is the permit active? Signed copy of the Engineer's certification is in the file? Signed copy of the Operation & Maintenance Agreement is in the file? Copy of the recorded deed restrictions is in the file? Comment: 1. A copy of the recorded deed restrictions for this area of Magmolia Greens has not been submitted. SW Measures Are the SW measures constructed as per the approved plans? Are the inlets located per the approved plans? Are the outlet structures located per the approved plans? Reason for Visit: Complaint Comment: 2. The surface area of the pond appears to differ from the approved plan. In one area, adjacent Morning View Way, a portion of the pond has been filled to accommodate the golf course fairway and a cart path, resulting in the loss of surface area and volume. Further southeast, adjacent Cornerstone Drive, it appears that pond area has been added behind the fairway. Operation and Maintenance Are the SW measures being maintained and operated as per the permit requirements? Vac Mn Ale MF Yes No NA NE D■DD ■D00 Yae Mn MA MF D■DD Are the SW BMP inspection and maintenance records complete and available for review or provided to DWQ ❑ ❑ D ■ upon request? Comment: 3. The pond's depth may be in question. A lot of shallow vegetation could be seen. 4. The outlet stucture is not faring well. This structure is allowing the runoff in the pond to drain through, around and under the flashboard riser. The structure must hold back the runoff in the pond up to elevation 23.5. The top board did not appear to be set at the proper elevation. The water level was down 1 foot, so at the time of this inspection there should have been at least 3.5 feet from the water surface to the top board elevation. There was only 1.5-2 feet. 5. A plan revision was delivered to DWQ on August 3, 2007 with details of the modified outlet structure. However, neither these plans nor an approval letter can be located. I need to get a copy of that 2007 approved plan and a copy of the approval letter. 6. The vegetation on the slopes is very good in most places. There are a few areas where the grass is sparse and bare spots are evident. Other WQ Issues Yes No NA NE Page: 3 Permit: SW8000220 Owner - Project: Landmark Developers Inc Inspection Date: 02109/2012 Inspection Type: Compliance Evaluation Is the site compliant with other water quality issues as noted during the inspection? Reason for Visit: Complaint Comment: 7. The outlet ditch after the flashboard riser is in extremely poor condition. The slopes are nearly vertical and extremely eroded, there's no vegetation on the slopes and there's a lot of silt accumulated in the ditch, which has partially blocked it off. 8. A gravel check dam has been added across the narrrow channel that leads to the outlet structure. 9. The tops of most of the equalization pipes were visually located. These pipes may need to be cleaned out of any accumulated sediment to facilitate "equalization" of the water levels in the various connected ponds. Page: 4 Lewis,Linda From: Michael Manna [mmanna@ec.rr.com] Sent: Thursday, February 09, 2012 10:19 PM To: Lewis,Linda Subject: Magnolia Greens Storm Water Ponds Linda, I was very glad to meet you today. It was an amazing coincidence that put you out there at the same time and place as our Magnolia Greens HOA Storm Water Pond Sub -Committee. We had a long day taking elevation measurements of specific features (water level, connecting pipes, storm water grates, etc) from the "weir" all the way down along Winding Trail, Parkmore, Pine Harvest, Morning View Way and Willow Pond. We concentrated on those areas that during past heavy rain events have experienced "ponding". It will take a few days, but when complete we hope we will have an accurate picture of the area topography which will allow us to make some sense of what and how this happens. The long term goals of our committee are: ■ Set a level of expectation for homeowners as to what to expect from the storm water system (ponds, streets, property) during extensive rain events ■ Get the HOA ready to accept the permits when turned over by Landmark ■ Determine the future cash reserves that will be necessary for any long term storm water pond remediation As I indicated to you we have met with the new owners of the Magnolia Greens Golf Course to discuss the permitted ponds that are now on their property. We believe that the necessary easements are in place that would allow the HOA access to those ponds should future remediation be necessary. We have also discussed with the golf course that they need to be a partner with the HOA in keeping the "Lakes" at a maximum elevation of 21 feet above sea level before a "significant" rain event, by pumping it down as necessary to get to that level or lower. They assured us that during the summer they really depend upon that system of ponds to irrigate the golf course. It is their "life line". Their pumping system, when in operation, can remove 900 GPM from that pond. During the summer they are pumping between 500,000 to 1,000,000 gallons a day up to the pond behind the clubhouse for irrigation. I feel we are on the "same page" with them. I have also met with Landmark, Chris Stephens, and he is in the process of preparing a package of all the permits and drawings to hand over to the HOA. I believe that he wants to help us understand the operation of the entire storm water pond system as well as prepare us to take over the permits and any associated reporting when turnover occurs. I am aware that in 2011 Landmark did some significant remediation to the ponds behind holes #5 and #6 off Willow Pond Land as well as the pond behind hole #21 off West Cove Loop. My only area of concern is the design and operation of the "weir" and it's removable boards. At present the Town of Leland feels it is their responsibility to remove the "boards" as necessary before a significant rain event. We have met with the Town of Leland and have a good relationship with Steve Spruill, the Public Work Director. As you may know, in Magnolia Greens all of the streets belong to the Town rather than the HOA so they also are our partner. Again, it was good to meet you today. I can assure you that the Magnolia Greens HOA wants to be a partner with NC DWQ when the permit turnover occurs. My e-mail address is mmanna@ec.rr.com. If during your review, you found something that would help us in our efforts, I would love to know about it. Regards, Mike Marna Magnolia Greens HOA — Member at Large Storm Water Pond Sub -Committee Chaiman 1159 Willow Pond Lane Magnolia Greens Golf Plantation Leland, NC 28451 Home: (910) 371-6860 Mike's iPhone: (910) 233-5256 CAPE FEAR Engineering, Inc. August 3, 2007 Rhonda Hall NC OfNR-DWQ 127 Cardinal Drive Extension Wilmington, NC 26405-3845 Re: Rhonda: Notice of Violation The Lakes at Magnolia Greens 5W8 000220 RECEIVED JAN 2 5 2012 BY: 2=717,77;AIngV1n a We are in receipt of Ed Beck's letter dated June 25, 2007 regarding the above described Notice of Violation and offer the following response: r I . A written plan of action is included with the narrative response attached to this letter. 2. In speaking with Rhonda Hall about the modified spillway, it was concluded that a permit modification is not necessary, only a plan revision. The detail sheet previously approved for this project has been revised to show the modified spillway, and is attached to this response as a plan revision. 3. The designer certification for this project is attached to this response. 4. Operation and maintenance issues are addressed in the narrative plan of action. 5. The permittee has assured me that the deed restrictions for this project have been legally recorded and submitted as required. Additional copies of the recorded deed restrictions are available if needed. I trust this information is sufficient to satisfy the requirements of the Notice of Violation, and upon completion of required maintenance to the ponds, settle the violation completely. 5hould you have any questions, c mments, or require additional information regarding this matter, please contact this office. Respectf 9' K. Davis F nell, PE cc : File (230-45) Chris Stephens 151 f°bofs R md, Suite 100 - Bai 1;g MC 20451 - TEL• (910)383-1044 - FAX. (910)383-1045 wwwcapmwrwlghAmf ng.com Narrative Plan of Action For Phase VI / The Lakes at Magnolia Greens Plantation SW8 000220 Prepared for: Landmark Developers 5022 Wrightsville Ave. Suite 102 Wilmington, North Carolina 28403 (910) 392-3828 Date: August 3, 2007 Prepared by: ape k'ear Engineering, Inc. 151 Poole Road, Suite 100 Belville, North Carolina 28451 (910) 383-i044 The storm ponds for The Lakes were constructed and stabilized seven years ago in 2000 for golf course use, and were later permitted for utilization in stormwater treatment. They have performed quite well and maintenance has been fairly uneventful with the most significant issues being construction debris, algae control during dry spells and minor erosion. Since the construction of the ponds, and with increased home construction, additional specialty subcontractors have been employed to manage the ponds through the property manager for the association. Specifically, a water quality subcontractor, Estate Management Company, is employed to monitor the actual water conditions of the ponds and provide maintenance and preventive measures to include vegetation, algae control, debris, and fish stocking. A landscape maintenance subcontractor, who performs additional maintenance operations within the community, has been contracted to mow the banks and to provide general repairs and debris removal. The community association operates under a property management company, CEPCO, whose offices are located within the community. Finally, an association grounds committee, made up of residents, reviews and monitors all common grounds activities and maintenance, reviews subcontractor performance, addresses landscape issues, modifications and enhancements. i The conditions that exist, as referred to the June 5, 2007 inspection, are a direct result of two unique and coincidental weather extremes. The storms and record rainfall events of July, August, and September 2006 caused major flooding to the Leland area roads and subdivisions. In total, nearly 27 inches of rain fell in about 36 days — far exceeding design standards and expected storm frequency. Streets became flooded, the ponds and lakes swelled to bank tops and outfall tributaries were significantly backed up. Fortunately, the flooding subsided over several hours except where blockages occurred. Many residents, not completely understanding the magnitude of rainfall over the design pleaded with the developer and the Town of Leland to review any possible relief in those situations. After several meetings with the Public Works department and Town Manager for the Town of Leland and at Public meetings, it was decided that expansion of the outfall ditch and a conversion of the outlet to the pond to a weir structure. The weir allows the pond to be lowered prior to a known tropical storm or hurricane event thereby creating storage buffer. The weir was installed at the ponds designed storage elevation and the outfall ditch was widened. The major storm of 2006 was hurricane Ernesto that dumped a record rainfall on the immediate area along with very high winds on August 31, 2006.. With much of the land still saturated from the previous flooding rains, Ernesto pushed pond levels to nearly the top of banks. With the soils being of a very course sand type the saturation was apparently intense. As water levels receded, the sands eroded from underneath the established sod, leaving sinkholes and rills in the bank. This is further evidenced by the horizontal breaks in the grass. This is the more common damage except for a few areas of the pond that face the southeast and were apparently whipped by wave action from the very high winds of the Ernesto storm. As the significant wet weather ended in late 2006 as the pond bank was dormant, the drought of 2007 materialized and it wasn't until June of 2007 that ever. 5" of rain had been recorded in eastern Brunswick I.-bi niy. By that time, a multitude of efforts ivere in motion analyzing the conditions, understanding the circumstances, scheduling repairs and coordinating the phases of needed repairs. The developer along with the property manager, association committee members and residents walked the pond to assemble repair "punch -lists". Algae, erosion, plant/tree outcrops, silt occur►iuiatioi;, pipe outlet stabilization and aeration needs were noted and inventoried. The pond, even at March, was quite low and by May was nearly 3 feet low with algae becoming uncontrollable by the pond contractors. It was decided to begin with the silt removal which had accumulated at various pipe inlets to the pond. Long -reach excavators were employed to remove these sandy -silt areas while the ponds were excessively low. Additional measures were taken to stabilize the areas around pipe inlets with geo-textile fabric and rip -rap aggregate material. The silt and pipe inlet protection work, not limited by the drought or pond level conditions, began immediately as was completed in about a week's time. The algae was manually removed by the pond contractor with large rakes after tvnical chemical treatments failed to provide a timely reduction of the algae. The repair of erosion areas was further reviewed by several landscape contractors who looked at the various kinds of conditions. The prevalent concern was the drought and the effectiveness of repairs without adequate irrigation. Upon further review it was found that while there is an abundance of irrigation systems contiguous to the pond, not many of them were adjusted or designed to adequately water the bank areas. The committee and residents moved to request irrigation cooperation from those contiguous residents. Residents were asked to provide hose type of irrigation, if necessary, for a repair area that might exist behind there home. There appears to be a general cooperation but everyone agreed that it would be better if the repairs could commence with the eventual return of normal rainfall. Many of the irrigation systems were adjusted and residents began a greater effort of watering the banks. Since May, and before repairs, the general grass conditions have improved measurably with a little more rainfall and additional irrigation efforts. It was concluded that without rain the erosion was not getting worse and wetter conditions would improve the success of sod repairs. Since that time, it appears that the drought is finally ending and those involved feel that conditions are now adequate to initiate those erosion repairs. Pond levels are near the typical normal level again. The landscape contractors should begin within the next week with the erosion repairs as irrigation is coordinated for each repair area. i— Lewis,Linda From: Lewis, Linda Sent: Wednesday, November 30, 2011 1:14 PM To: 'Melissa Juhan' Subject: The Lakes at Magnolia Greens SW8 000220 Melissa: I've always believed in miracles and today one has occurred. After almost 2 months, I have found the missing SW8 000220 file!!! Please let me know when you would like to come in and review it. If memory serves me, I believe we were trying to find out what we permitted as the outlet structure. As it turns out, the pond is "non -discharging" meaning that it was approved to store up to 8" of rain without discharging. The 2005 approved plans show a permanent pool at elevation 21.0 and a gravel emergency spillway set into the bank of the pond at elevation 23.5, which is the temporary pool elevation. A Notice of Violation was issued in 2007 and says, in part, that the approved spillway structure was replaced by a new weir and a new dam without benefit of an approved permit modification. That is the current status of this project — we are still waiting for the permittee to submit an application to modify the permitted outlet structure. There is currently no approval for any type of flashboard riser for this pond. The NOV also indicates that neither the recorded deed restrictions nor the required Designer's Certification were submitted. I will be following up on this as soon as possible. Thanks for your patience. Linda Lewis NC Division of Water Quality 127 Cardinal Drive Ext. Wilmington, NC 28405 910-796-7215 E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third part N P41 21/ tJ 'i O- n) 2r,0/ 3I13/2009 - etr David; I pulled this file from storage as a gentlemen by the name of Tige Brubacker requested a file review. He came in today to review it and requested to speak with me. In looking at the file with him, it looks like the ball was dropped back in 2007 with the NOV that Rhonda sent out. I gave Mr. Brubacker your name/phone — you will most likely hear from him. I told him that you would probably want to go inspect the location again as it sounds as though there is a lot of activity going on our there. PIM Tige Brubaker; 216-470-6970 �t&..-A j1 _ � �• �- �,_ r�,.�t, �'�! ��-� -i /dU0 � /Ili t RE: File Review Request Sw0ject: RE: File Review Request From: Tige Brubaker <Tige.Brubaker@dpua.org> Date: Tue, 24 Feb 200914:00:06 -0500 To: Jo Casmer <Jo.Casmer@nemail.net> MY Phone is 216-470-6970. ----- Orig inal ..message ----- From: Jo Casmer [mailto:Jo.Casmer@ncmail.net] Sent-: Tuesday, February 24., 2009 1:58 PM To: Tige Brubaker Subject: Re: File Review Request In further examination, I have discovered that "The Lakes at Magnolia Greens Phase IV" was a duplicate project of Magnolia Greens Patio Homes. There is no permit for the Phase IV project - it was issued under the Patio Homes project. It is an older file and is stored offsite in our storage facility. I am adding the file number to our running list we keep. As soon as someone goes over to storage, the file will be brought back. Once I have it in hand, I will call you and schedule a day/time for you to come look at it. Please provide a contact number for me - you will hear from me as soon as I have the file. Tige Brubaker wrote: Yes, Can I see the permit, design and calcs. for the pond and the outfall structure. Thanks Tige -----Original Message ----- From: Jo Casmer (mailto:Jo.Casmer@ncmail.net] Sent: Tuesday, February 24, 2009 12:22 PM To: Tige Brubaker Subject: File Review Request Linda Lewis forwarded your request to me to review a file called "The Lakes at Magnolia Green Phase VI." I have searched our system and we have no project by that name. As close as I can come is The Lakes at Magnolia Greens Phase IV. I have searched our system a variety of ways and I have nothing for any version of "Magnolia" that has a Phase VI. I will wait to hear back from you. Jo Casmer Administrative Assistant IV NC Dept. of Environment & Natural Resources Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone: (910) 796-7336 Fax: (910) 350-2004 Email correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. 1 of 2 3/2/2009 2:19 PM RE: File Review Request Jo Casmer Administrative Assistant IV NC Dept. of Environment & Natural Resources Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone: (910) 796-7336 Fax: (910) 350-2004 Email correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. 2 of 2 3r M009 2:19 PM < �0 IN TF9Q �O G r J Mr. Mike Toht 1714 Dawnridge Court Leland, NC 28451 1,6�'-',C July 3, 2007 Subject: Stormwater Permit No. SW8 000220 The Lakes at Magnolia Greens High Density Subdivision Project Brunswick County Dear Mr. Toht: 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 Wilmington Regional Office received a letter from you dated May 29, 2007 requesting that our office investigate a number of possible permit violations. Wilmington Regional Office staff performed a site visit of this facility on June 5, 2007. The possible violations along with our finding are as follows: Possible Violation: The original permitted weir was removed without a permit modification. Findings: The site visit revealed that the emergency spillway, which I believe is what you refer to as the weir, associated with this facility has been modified. Our office has requested that the permittee submit an application for this modification (scc attached Notice of Violation dated July 3, 2007). Possible Violation: A newly designed weir and new dam were constructed without a permit. Findings: The site visit revealed that the emergency spillway, which I believe is what you refer to as the weir, associated with this facility has been modified. Our office has requested that the permittee submit an application for this modification (see attached Notice of Violation dated July 3, 2007). III. Possible Violation: Many of the basin side slopes are steeper than 3:1 as specified in the approved permit to build "The Lakes" Findings: Based on a review of the file associated with this facility, it appears that this office has not received a certification from an appropriate designer for this project. This office has None Carolina )VIaMmily North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone (910) 796-7215 Customer Service Wilmington Regional Office Internet: www.ncwaterouality.ora Fax (910) 350-2004 1-877-623-6748 An Equal Opportunity/Affirmative Action Employer— 50% Recycled110% Post Consumer Paper The Lakes at Magnolia Greens Stormwater Permit No. SW8 000220 Page 2 of 4 requested that the permittee provide a certification, from an appropriate designer for the system installed, certifying that the permitted facility has been installed in accordance with the permit, approved plans and specifications, and other supporting documentation (see attached Notice of Violation dated July 3, 2007) The site visit revealed that the basin side slopes between the temporary pool elevation, 23.5 FMSL (Feet Mean Sea Level ) and the maximum permanent pool elevation, 21 FMSL appeared to be approximately 3:1 (horizontal to vertical). North Carolina Administrative Code 15A NCAC 02H .1008 (e)(7) requires that the basin side slopes for the storage volume above the permanent pool shall be stabilized with vegetation down to the permanent pool level and that the side slopes shall be no steeper than 3:1 (horizontal to vertical). IV. Possible Violation: The operation and maintenance plan specified in the permit has not been followed by the permittee and significant maintenance has not occurred. Findings: The site visit revealed that the side slopes in several areas throughout the pond, had eroded areas with very little vegetation. The sediment in the pond did not appear to have reached the required sediment removal elevation of 18.0 FMSL. This office has requested that the permittee provide the necessary operation and maintenance to assure that the permitted stormwater system functions at optimum efficiency. The permittee shall also ensure that the operation and maintenance agreement associated with this facility is followed in its entirety and that maintenance occurs at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. c. Mowing and re -vegetation of side slopes. d. Immediate repair of eroded areas. e. Maintenance of side slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of structures, orifice, catch basins and piping. g. Access to all components of the system must be available at all times. V. Possible Violation: No system seems to be in place to ensure that no water is removed from the system facility when the permanent pool elevation of 21.0 FMSL is reached. The Lakes at Magnolia Greens Stormwater Permit No. SW8 000220 Page 3 of 4 Findings: A review of the approved plans, specifications, calculations and other supporting documentation indicates'that the key control strategy for this stormwater management system is to provide, as a minimum, enough volume in the pond to hold a 25-year rainfall event (8" design storm) without discharging. This minimum required volume is to be provided between an established maximum water elevation (maximum permanent pool elevation — 21 FMSL) and the elevation of the pond outlet (temporary pool elevation — 23.5 FMSL). Based on this control strategy, the permanent pool elevation of 21 FMSL listed in the permit is the maximum elevation at which the water level can be maintained without compromising the pond's ability to provide enough volume, between the maintained water level elevation and the temporary pool elevation, to hold a 25-year rainfall event. Maintaining a water level below the maximum permanent pool elevation of 21 FMSL would provide additional storage volume in the pond beyond the 25-year rain event. This condition would not be considered to be a violation of the conditions of the permit. This particular stormwater system is designed such that the volume between elevations 21 FMSL (maximum permitted permanent pool elevation) and 23.5 FMSL (permitted temporary pool elevation) holds the 25-year rainfall event (8 inch design storm). There should be no outlet below elevation 23.5 FMSL. The permitee proposes to assure that this volume is reserved for future storms by maintaining the elevation of the water in the pond at 21 FMSL or less. The permittee currently maintains an elevation of 21 FMSL or less by withdrawing water from this pond and using it to irrigate the golf course associated with this facility. The permittee must maintain a permanent pool elevation of no more than 21 FMSL. Maintaining a permanent pool elevation of no more that 21 FMSL will ensure that the key control strategy of providing enough storage volume to hold the 25-year rainfall event (8" design storm) with no discharge is being complied with. VI. Possible Violation: Public Health Concerns about stagnant water and excessive pond scum covering significant pond surfaces. Findings: The Division of Water Quality currently allows decorative fountains to be used in state stormwater ponds. Certain benefits can de derived from The Lakes at Magnolia Greens Stormwater Permit No. SW8 000220 Page 4 of 4 correctly sized and placed fountains, namely, increased dissolved oxygen levels, increased flocculation of certain pollutants, denitrification, and the discouragement of mosquito breeding. For your convenience, I have attached a copy of the Fountains in Stormwater Extended Wet Detention Pond Guidance dated September 24, 2003. In addition; it is my understanding that certain species of plants and fish will assist in the discouragement of mosquito breeding. As a reference, you might want to consider North Carolina State University's Stormwater Website (httr)://www.bae.ncsu.edu/stormwater/). This website indicates some measures that can be used to assist in the discouragement of mosquito breeding. While the current State Stormwater Regulations allow for the use of measures, such as fountains, plants, fish, etc. to aid in the discouragement of mosquito breeding, these regulations do not give jurisdictional authority to require that these measures be installed. If you have any questions, or need additional information concerning this matter, please contact Rhonda Hall or me at (910) 796-7215. Sincerely, Edward Beck Regional Supervisor Surface Water Protection Section ENBlrbh: S\WQS\STORMWATER\LETTERS\2007\000220.ju107 cc: Dennis Deasy Rhonda Hall Wilmington Regional Office ■ Complete items 1, 2, and 3. Also complete item 4 if Restricted Delivery is desired. ■ Print your name and address on the reverse so that w Gan return the card to you. ■ Attach thi card to the back of the mailpieoe, or on the f nt if space permits. 1. Article Addressed to: Al id &Ri'sroP.4et' S A. Signature X O%,, ���,� A Agent ❑ Addressee B. Received by (Prints C. Date of Delivery 7 '6 -66 D. Is delivery address different from item 1? ❑ Yes If YES, enter delivery address below: ❑ No L a 17 d1na1 r,�' Lope,-s `�L�✓c 502- Z Ville AW ' 3. Se Ice Type Certified Mail ❑ Express Mail Registered ❑ Return Receipt for Merchandise 4)i'L Mi n❑Insured r' Mail ❑ C.O.D. 4. Restricted Delivery? (Extra Fee) ❑ Yes 2. (rhansfer cle Rol; - 7006 2760 0003 3529 1809 (Transfromservice fabe� PS Form 3811, February 2004 Domestic Return Receipt 102595-02-M-1540 ; a WA rFi9QG Michael F. Easley, Governor William G. Ross Jr., Secretary r North Carolina Department of Environment and Natural Resources 0 'C Coleen H. Sullins Director Division of Water Quality June 25, 2007 CERTIFIED MAIL #7006 2760 0003 3529 1809 RETURN RECEIPT REQUESTED Mr. W. Christopher Stephens, President Landmark Developers, Inc. 5022 Wrightsville Avenue, Suite 102 Wilmington, NC 28403 Subject: NOTICE OF VIOLATION The Lakes @ Magnolia Greens Stormwater Permit No. SW8 000220 Brunswick County Dear Mr. Stephens: On June 5, 2007, Wilmington Regional Office personnel performed a Compliance Inspection of the subject project, located approximately 1000 feet Northeast of the Highway 17 and Lanvale Road intersection in Leland, Brunswick County, North Carolina. The inspection was performed to determine the status of compliance with Stormwater Permit Number SW8 000220, issued to you on May 12, 2005. Based on the June 5, 2007 compliance inspection and a review of your files, the project has been found in violation of Stormwater Permit Number SW8 000220, issued pursuant to the requirements of 15A NCAC 2H.1000. The violations found are: 1. Failure to submit and receive approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans. It appears that the emergency spillway associated with this facility has been modified. 2. Failure to submit a certification from an appropriate designer for the system installed. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed in accordance with this permit, the approved plans and specifications and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. 3. Failure to perform the required operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency. Based on an inspection performed on June 5, 2007, it appears that the approved operation and maintenance agreement is not being followed in its entirety. In several areas throughout the pond, the side slopes had eroded areas with very little vegetation. 4. Failure to submit a copy of the recorded deed restrictions for this property. 1N Caro ' a %wrak � Noi ui'Carolila Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone (910) 796-7215 Customer Service Wilmington Regional Office Internet: www.ncwaterqualitv.ore Fax (910) 350-2004 1-877-623-6748 An Equal Opportunity/Affirmative Action Employer— 50% Recycledl10% Post Consumer Paper July 3, 2007 The Lakes @ Magnolia Greens Stormwater Permit No. SW8 000220 To correct these violations you must: 1. Provide a written "Plan of Action" which outlines the actions you will take to correct the violation(s) and a time frame for completion of those actions, on or before August 3, 2007. 2. Provide one complete application package for the modification. A complete application package includes all of the items listed below.: a. One original of the Stormwater Management Permit Application Form b. One original of the applicable Supplement Form(s) for each BMP C. Permit application processing fee of $420 (payable to NCDENR) d. Detail narrative description of stormwater treatment/management e. Two copies of plans and specifications ■ Development/Project name ■ Engineer and firm ■ Legend ■ North arrow • Scale • Revision number & date • Mean high water line ■ Dimensioned property/project boundary Location map with named streets or NCSR numbers • Original contours, proposed contours, spot elevations, finished floor elevations ■ Details of roads, drainage features, collection systems, and stormwater control measures ■ Wetlands delineated, or a note on plans that none exist ■ Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations ■ Drainage areas delineated ■ Vegetated buffers (where required) a copy of the recorded deed restrictions for this property, including all lots associated with this subdivision that have been subdivide or sold. 3. Provide a certification, from an appropriate designer for the system installed, certifying that the permitted facility has been installed in accordance with the permit, approved plans and specifications, and other supporting documentation. 4. Provide the necessary operation and maintenance to assure that the permitted stormwater system functions at optimum efficiency. Ensure that the operation and maintenance agreement associated with this facility is followed in its entirety and that maintenance occurs at the scheduled intervals including, but not limited to: Page 2 of 5 July 3, 2007 The Lakes @ Magnolia Greens Stormwater Permit No. SW8 000220 a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. c. Mowing and re -vegetation of side slopes. d. Immediate repair of eroded areas. e. Maintenance of side slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of structures, orifice, catch basins and piping. g. Access to all components of the system must be available at all times. 5. Submit a copy the recorded deed restrictions for this property. Failure to provide the 'Plan of Action" by August 3, 2007, or to correct the violations by the date designated in the "Plan of Action", are considered violations of 15A NCAC 2H.1000, and may result in the initiation of enforcement action which may include recommendations for the assessment of civil penalties, pursuant to NCGS 143-215.6A. By copy of this letter to the Onslow County Building Inspector, this Office is requesting that the Building Inspector consider withholding building permits and Certificates of Occupancy for this project until this matter is satisfactorily resolved. If you have any questions concerning this matter, please call Rhonda Hall at (910) 796- 7335. Sinc ly, Ed Beck Regional Supervisor Surface Water Protection Section ENB1rbh: S:IWQSISTORMWATINOTICE1000220MOD.ju107 cc: Comer Lyons, Cape Fear Engineering Inc. Brunswick County Building Inspections Michael Toht Rhonda Hall Wilmington Regional Office Central Files Page 3 of 5 PERMIT VIOLATIONS NOTIFICATION THE LAKES — STORM WATER MANAGEMENT PERMIT Permit No SW8000220 Wet Detention Pond Stormwater Facility Mr. Ed Beck North Carolina Division of Water Resources 7MAY CF,7VE�I I,Wilmington Regional Office 2 9 2007 May 29, 2007 Dear Mr. Beck, A review of the above permit (which allowed for the building of "The Lakes" section of Magnolia Greens) by a number of residents evidences a number of possible permit violations that we would like investigated. The possible violations are as follows: THE ORIGINAL PERMITTED WEIR WAS REMOVED WITHOUT A PERMIT MODIFICATION. The permit says that alteration of the drainages as shown on the approved plans should not take place without concurrence of the Division of Water Quality. The removal of the weir caused significant water runoff and allowed for no water retention. A NEWLY DESIGNED WEIR AND NEW DAM WERE CONSTRUCTED WITHOUT A PERMIT. Again, alteration of the drainages as shown on the approved plans should not take place without concurrence of the Division of Water Quality. The permittee has refused, at a Home Owners Association committee meeting, to apply for a permit to comply with State permit requirements. MANY OF THE BASIN SIDE SLOPES ARE STEEPER THAN 3:1 AS SPECIFIED IN THE APPROVED PERMIT TO BUILD "THE LAKES". Basin side slopes above the permanent pool are specified to be no steeper than 3:1(33.3% slope) in the permit. A majority of the system's slopes are in excess of 3:1, some are in excess of a 45% slope. The permittee certified in the permit to the Division of Water Quality that the slopes were no steeper than 3:1 but they are not in compliance. Corrective actions are needed to be taken by the permittee to remediate the excessive water runoff and erosion caused by the non -compliant slopes. THE OPERATION AND MAINTENANCE PLAN SPECIFIED IN THE PERMIT HAS NOT BEEN FOLLOWED BY THE PERMITTEE AND SIGNIFICANT MAINTENANCE HAS NOT OCCURRED. Significant erosion, sediment, and lack of slope maintenance are evident. Resident requests for erosion remediation have been ignored in the past by the permittee. Sediment removal has not occurred. The permittee has said erosion and sediment removal would be done. There have been several delays. No results are evident at this writing. NO SYSTEM SEEMS TO BE IN PLACE TO INSURE THAT NO WATER IS REMOVED FROM THE SYSTEM FACILITY WHEN THE PERMANENT POOL ELEVATION OF FMSL 21.0 IS REACHED. The permanent pool level of 21 FMSL is the level below which water, by permit, cannot be drawn from the ponds for any purpose including watering the golf course. The permittee insists that the permit allows water drawdown to zero level destroying the pond ecosystem. The permittee is taking water to irrigate the golf course at this time. There appears to be no measuring system in place such as a staff gauge to ensure water levels are not drawn down lower than permit allowable levels endangering the pond ecosystem. PUBLIC HEALTH CONCERNS ABOUT STAGNANT WATER AND EXCESSIVE POND SCUM COVERING SIGNIFICANT POND SURFACES. There are algal blooms and noxious plants evident potentially leading to breeding grounds for mosquitoes and other disease carrying insects. Please have the Regional Office staff person responsible for investigating this permit violation notice inform The Lakes residents of progress toward resolution of these violations and any fines that may be levied The Lakes residents' group contact person: Dennis Deasy 1915 Bridlewood Court Leland NC 28451 910-3 71-1117 Sincerely, Michael Toht 1714 Dawnridge Court Leland, NC 28451 910=5324905